EP1213486B1 - machine de fendage de bois avec circuit de régéneration d'un vérin hydraulique à simple effet - Google Patents

machine de fendage de bois avec circuit de régéneration d'un vérin hydraulique à simple effet Download PDF

Info

Publication number
EP1213486B1
EP1213486B1 EP01204395A EP01204395A EP1213486B1 EP 1213486 B1 EP1213486 B1 EP 1213486B1 EP 01204395 A EP01204395 A EP 01204395A EP 01204395 A EP01204395 A EP 01204395A EP 1213486 B1 EP1213486 B1 EP 1213486B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
chamber
conduit
log splitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01204395A
Other languages
German (de)
English (en)
Other versions
EP1213486A3 (fr
EP1213486A2 (fr
Inventor
Elio Magnani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bell Srl
Original Assignee
Bell Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bell Srl filed Critical Bell Srl
Publication of EP1213486A2 publication Critical patent/EP1213486A2/fr
Publication of EP1213486A3 publication Critical patent/EP1213486A3/fr
Application granted granted Critical
Publication of EP1213486B1 publication Critical patent/EP1213486B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L7/00—Arrangements for splitting wood
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F15B2011/0243—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits the regenerative circuit being activated or deactivated automatically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3058—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3122—Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
    • F15B2211/3133—Regenerative position connecting the working ports or connecting the working ports to the pump, e.g. for high-speed approach stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7716—Control of direction of movement of the output member with automatic return
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/775—Combined control, e.g. control of speed and force for providing a high speed approach stroke with low force followed by a low speed working stroke with high force, e.g. for a hydraulic press

Definitions

  • This invention relates to a log splitting machines in which the log splitting action is provided by a single-acting hydraulic cylinder-piston unit with spring return.
  • Such log splitting machines normally comprise a virtually horizontal operating seat in which the log to be split is positioned between two mutually movable members, known as the log pusher and the blade.
  • the log pusher is normally fixed, while the blade is operated by a hydraulic cylinder-piston unit, which can either be single or double acting and is connected to a motor-driven pump by way of a suitable interposed distributor.
  • Log splitting machine are known from WO 93/15886, comprising a single acting hydraulic cylinder-piston unit with its return controlled by an elastic means such as a spring, a motor-driven pump and an hydraulic distributor arranged to selectively connect the piston chamber of said cylinder-piston unit to the pump delivery or to discharge.
  • the respective cylinder-piston unit can be operated in two modes, usually known as normal and regenerative, to which two different lengthening speeds of the cylinder-piston unit correspond.
  • a usual single acting cylinder-piston unit comprises an outer cylinder and a slidable inner piston which divides the volume of the cylinder into two parts usually known as the piston chamber and the piston rod chamber, this latter housing at least one elastic return means, typically a helical spring.
  • a single acting cylinder-piston unit When operating in the normal operative mode a single acting cylinder-piston unit is elongated by feeding oil into the piston chamber, with consequent loading of the at least one spring, the same cylinder-piston unit being shortened by the thrust of the spring after connecting the piston rod chamber to discharge.
  • a usual double acting cylinder-piston unit comprises an outer cylinder and a slidable inner piston which divides the volume of the cylinder into two parts again known as the piston chamber and the piston rod chamber, these two chambers being both constantly filled with oil.
  • the outward speed of the piston when in regenerative mode is exactly twice its outward speed when in normal mode.
  • switching between the regenerative and the normal mode can be done manually by operating the oil distribution valve positioned downstream of the pump, or automatically by providing a conduit which short-circuits the oil between the two chambers of the cylinder-piston unit by the controlled operation of a valve sensitive to the pressure in the piston chamber.
  • the service hydraulic unit of the log splitting machine is set in the regenerative mode, which in order to achieve maximum log splitting speed with minimum force is maintained if the log does not offer excessive resistance, i.e. such as to raise the pressure of the oil in the piston chamber above a predetermined value.
  • the machine is switched between the regenerative and the normal mode, in one of the aforesaid ways.
  • the result of said automatic or manual switching is minimum lengthening speed with maximum available force.
  • said circuits do not allow automatic switching between the regenerative and the normal operating mode.
  • the main object of the present invention is precisely to satisfy said requirement.
  • a further object is to satisfy said requirement within the context of a simple, rational, reliable, durable and low-cost construction comprising a relatively small number of component parts.
  • It is of the type essentially comprising a hydraulic circuit with a motor-driven pump for supplying pressurized oil to a hydraulic distributor by means of which the lengthening and shortening strokes of the cylinder-piston unit can be selected.
  • This latter comprises a piston chamber and a piston rod chamber which are both filled with oil, and a transfer path through which, during lengthening of the cylinder-piston unit, the oil present in the piston rod chamber can either flow into the piston chamber or be discharged into the pump reservoir, depending on the state of a preset pressure-sensitive valve present in the piston chamber.
  • the piston rod chamber is directly connected to the reservoir by an independent conduit provided with a directional valve which prevents the oil discharging into the reservoir but enables it to rise from the reservoir to the piston rod chamber.
  • a transfer conduit is provided which bypasses the distributor and is intercepted by a first unidirectional valve which prevents transfer of oil from the piston chamber to the piston rod chamber but not vice versa.
  • It comprises a hydraulic pump 1 driven by a motor unit 2 and presenting a suction conduit 10 which dips into an oil-containing reservoir 3, and a delivery conduit 4 connected to a hydraulic distributor 5 of sliding type.
  • the distributor comprises a first position in which the pump is connected directly to the piston chamber of the cylinder-piston unit, and a second position in which the pump and piston chamber of the cylinder-piston unit are both connected to discharge.
  • a recirculation conduit 6 which leads to the reservoir 3 and is intercepted by a maximum pressure valve 60.
  • the distributor 5 presents an extremely simple constructional form in that it comprises only two operative positions, to be selected by the user, for example in operating a log splitting machine.
  • the position illustrated corresponds to the passive or return stroke of the log splitting blade, the other position corresponding to the active or outward stroke of the blade.
  • the single acting cylinder-piston unit 9 associated with the blade presents a first chamber 90 between the piston 8 and the cylinder rear end, hereinafter known as the piston chamber, and a second chamber 91 between the piston 8 and the cylinder front end, hereinafter known as the piston rod chamber, in which a compression spring 99 is housed for the return of the piston.
  • Both said chambers 90, 91 are constantly filled with oil.
  • the piston chamber 90 is connected to the casing of the distributor 5 by the conduit 7, whereas the piston rod chamber 91 is connected to the reservoir 3 by the conduit indicated by 12.
  • the conduit 12 is intercepted by an overpressure valve 120 of presetting type as shown, which is operationally connected to the conduit 7 as shown in the figure by a dashed line, and is sensitive to the pressure in the conduit 7.
  • a transfer conduit 13 connects the conduit 12 upstream of the valve 120 to the conduit 7.
  • the transfer conduit 113 could evidently be directly connected to the chambers 90 and 91 of the cylinder-piston unit 9.
  • the transfer conduit 13 is intercepted by a unidirectional valve 130, which in the illustrated example is a non-return valve of ball type, and when in its closed position prevents passage of oil from the conduit 7 to the conduit 12.
  • a unidirectional valve 130 which in the illustrated example is a non-return valve of ball type, and when in its closed position prevents passage of oil from the conduit 7 to the conduit 12.
  • An oil suction conduit 14 is also provided, which connects that branch of the conduit 13 upstream of the valve 130 to the reservoir 3 and is intercepted by a non-return valve 140, which in the illustrated example is a ball valve preventing flow of oil towards the reservoir.
  • a discharge conduit 15 branches from the casing of the distributor 5 and is connected at its other end into the conduit 12 upstream of the respective overpressure valve 120.
  • the discharge conduit 15 could evidently be directly connected to the reservoir 3.
  • the described unit operates in the following manner.
  • valves 120, 130 and 140 are closed and the pumped oil returns to the reservoir 3 through the conduit 15 connected into the conduit 12.
  • the hydraulic unit automatically switches from regenerative mode to normal mode, by which the log splitting blade advances at minimum speed to act on the log with maximum force.
  • valve 140 On attaining said preset pressure the valve 140 remains closed, whereas the valve 120 opens with simultaneous closure of the valve 130, with the result that only the pumped oil enters the piston chamber 90, whereas the oil leaving the piston rod chamber 91 is discharged to the reservoir 3 through the valve 120.
  • valve 120 recloses and the valve 130 automatically returns to the previously occupied position, the system then returning to its regenerative configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Scissors And Nippers (AREA)
  • Lubricants (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Saccharide Compounds (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Steroid Compounds (AREA)
  • Gripping On Spindles (AREA)
  • Soil Working Implements (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)

Claims (4)

  1. Machine à fendre les bûches comprenant une unité à vérin hydraulique à cylindre et piston à simple effet (9) dont le retour est commandé par un dispositif élastique tel qu'un ressort, une pompe (1) entraínée par un moteur et un distributeur hydraulique (5) disposé afin qu'il relie sélectivement la chambre de piston (90) de l'unité à vérin (9) au refoulement de la pompe ou à l'évacuation, caractérisée en ce que la chambre de tige de piston (91) de l'unité à vérin (9) est raccordée à la chambre de piston (90) par un conduit comprenant une vanne unidirectionnelle (130) qui empêche le transfert du fluide hydraulique vers la chambre de tige de piston, et au réservoir de fluide hydraulique (3) par un conduit d'évacuation fermé par une vanne préréglée de surpression (120) sensible à la pression de refoulement de la pompe et par un conduit séparé d'aspiration muni d'une vanne unidirectionnelle (140) qui empêche la circulation du fluide hydraulique vers le réservoir (3).
  2. Machine à fendre les bûches selon la revendication 1, caractérisée en ce que les vannes unidirectionnelles (13, 140) sont des clapets à billes.
  3. Machine à fendre les bûches selon la revendication 1, caractérisée en ce que le distributeur hydraulique (5) est un distributeur ayant deux positions de fonctionnement correspondant au raccourcissement et à l'allongement de l'unité à vérin (9) respectivement, dans la première desquelles il relie à la fois le refoulement de la pompe (1) et la chambre de piston (90) au réservoir et dans l'autre desquelles il relie la pompe à la chambre de piston.
  4. Machine à fendre les bûches selon la revendication 3, caractérisée en ce que le distributeur (5) est un distributeur coulissant.
EP01204395A 2000-12-05 2001-11-16 machine de fendage de bois avec circuit de régéneration d'un vérin hydraulique à simple effet Expired - Lifetime EP1213486B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITRE20010125 2000-12-05
IT2000RE000125A IT1319478B1 (it) 2000-12-05 2000-12-05 Gruppo idraulico con sistema rigenerativo automatico tipicamente permacchine spaccalegna azionate da un martinetto a semplice effetto
ITRE200125 2000-12-05

Publications (3)

Publication Number Publication Date
EP1213486A2 EP1213486A2 (fr) 2002-06-12
EP1213486A3 EP1213486A3 (fr) 2004-01-07
EP1213486B1 true EP1213486B1 (fr) 2005-10-26

Family

ID=11454000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01204395A Expired - Lifetime EP1213486B1 (fr) 2000-12-05 2001-11-16 machine de fendage de bois avec circuit de régéneration d'un vérin hydraulique à simple effet

Country Status (7)

Country Link
EP (1) EP1213486B1 (fr)
AT (1) ATE307980T1 (fr)
DE (1) DE60114347T2 (fr)
DK (1) DK1213486T3 (fr)
ES (1) ES2248225T3 (fr)
IT (1) IT1319478B1 (fr)
NO (1) NO319360B1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE523110C2 (sv) 2002-07-15 2004-03-30 Stock Of Sweden Ab Hydraulsystem
RU2283221C1 (ru) * 2005-01-24 2006-09-10 Засульский Николай Данилович Станок для раскалывания древесины
SI22050B (sl) * 2005-06-01 2009-04-30 Tajfun Planina Proizvodnja Strojev D.O.O. Pogonska in upravljalna enota naprave za cepljenje drv ter postopek krmiljenja tovrstne naprave
RU2365495C1 (ru) * 2008-06-20 2009-08-27 Засульский Николай Данилович Станок для раскалывания древесины
US8752372B2 (en) 2010-05-21 2014-06-17 Deere & Company Regenerative hydraulic circuit for dump truck bin lift cylinder

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2800110A (en) * 1955-08-15 1957-07-23 Lake Erie Machinery Corp Hydraulic circuit for heavy duty presses and the like
US3077214A (en) * 1959-08-27 1963-02-12 Waco Aircraft Co Log splitter
FR2057287A5 (fr) * 1969-08-08 1971-05-21 Luchaire Sa
US3640323A (en) * 1969-11-05 1972-02-08 Sawmill Hydraulics Inc Apparatus for splitting and chopping timber
FR2102291B1 (fr) * 1970-08-17 1974-08-19 Amada Co Ltd
SE9200484L (sv) * 1992-02-18 1993-08-19 Jerzy Janczak Hydrauldrivet arbetsredskap
IT1287641B1 (it) * 1996-05-08 1998-08-06 Bell Srl Sistema idraulico di servizio per macchine spaccalegna

Also Published As

Publication number Publication date
EP1213486A3 (fr) 2004-01-07
DE60114347T2 (de) 2006-04-20
ITRE20000125A1 (it) 2002-06-05
EP1213486A2 (fr) 2002-06-12
ITRE20000125A0 (it) 2000-12-05
NO20015478L (no) 2002-06-06
NO319360B1 (no) 2005-07-18
IT1319478B1 (it) 2003-10-10
DK1213486T3 (da) 2006-03-13
NO20015478D0 (no) 2001-11-08
ES2248225T3 (es) 2006-03-16
DE60114347D1 (de) 2005-12-01
ATE307980T1 (de) 2005-11-15

Similar Documents

Publication Publication Date Title
US6701823B2 (en) Method and device for controlling a lift cylinder, especially of working machines
US5522212A (en) Rod equal displacement cylinder in a rapid transfer and feed system
EP3232057B1 (fr) Procédé de transmission ou de transport de matières fluides ou semi-fluides au moyen d'une double pompe à piston et pompe à piston double
US5105622A (en) Hydraulic unit for driving a tool
CA2247975A1 (fr) Unite piston-cylindre pneumatique a simple effet
EP1213486B1 (fr) machine de fendage de bois avec circuit de régéneration d'un vérin hydraulique à simple effet
US2283516A (en) Hydraulic transmission
EP0281330A2 (fr) Dispositif de serrage de moule
US4555220A (en) Regeneration system for a hydraulic intensifier unit
CN111347713A (zh) 特别是用于压力机或注塑机的静液的驱动器
JPH07115393B2 (ja) 射出速度制御における射出立ち上がり時間短縮方法
EP0806271B1 (fr) Mécanisme de commande hydraulique pour fendeuses à bois
KR101662781B1 (ko) 자체 증압이 가능한 유압실린더
US2683966A (en) Hydraulic press
US3742971A (en) Apparatus for controlling direction of movement of a cycling fluid motor
JP3775982B2 (ja) 流体圧シリンダ装置
WO1996012108A1 (fr) Dispositif de commande hydraulique et boite de vitesses equipee de ce dispositif de commande
US2419235A (en) Control system for hydraulic motors
JP3962170B2 (ja) 射出速度制御における射出立ち上がり時間短縮方法
JP2923634B2 (ja) 生地分割機の生地加圧装置
US2211370A (en) Hydraulic circuit
GB2063381A (en) Regeneration system for a hydraulic intensifier unit
JPH0433618B2 (fr)
RU2023909C1 (ru) Насос с мускульным приводом
CN120969285A (zh) 垃圾压缩站液压系统、控制方法及垃圾压缩站

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20040630

AKX Designation fees paid

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

17Q First examination report despatched

Effective date: 20041130

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RTI1 Title (correction)

Free format text: A LOG SPLITTING MACHINE WITH AUTOMATIC REGENERATIVE SYSTEM OF A SINGLE-ACTING HYDRAULIC CYLINDER

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MAGNANI, ELIO

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051026

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: CH

Ref legal event code: NV

Representative=s name: ISLER & PEDRAZZINI AG

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051130

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60114347

Country of ref document: DE

Date of ref document: 20051201

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060126

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2248225

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20060727

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: ISLER & PEDRAZZINI AG;POSTFACH 1772;8027 ZUERICH (CH)

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20081126

Year of fee payment: 8

Ref country code: IE

Payment date: 20081106

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20081106

Year of fee payment: 8

Ref country code: PT

Payment date: 20081107

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20081215

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20081127

Year of fee payment: 8

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 20100517

BERE Be: lapsed

Owner name: *BELL S.R.L.

Effective date: 20091130

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20091116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100517

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091130

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091130

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20101108

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20101117

Year of fee payment: 10

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20110304

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20101027

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110303

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091117

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20111128

Year of fee payment: 11

Ref country code: SE

Payment date: 20111124

Year of fee payment: 11

Ref country code: CH

Payment date: 20111130

Year of fee payment: 11

Ref country code: FI

Payment date: 20111116

Year of fee payment: 11

Ref country code: FR

Payment date: 20111208

Year of fee payment: 11

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20130601

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 307980

Country of ref document: AT

Kind code of ref document: T

Effective date: 20121116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121130

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121116

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121117

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20130731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121116

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121116

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130601

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60114347

Country of ref document: DE

Effective date: 20130601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121130