US3362307A - Road paving machine with pressure control means - Google Patents

Road paving machine with pressure control means Download PDF

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Publication number
US3362307A
US3362307A US479427A US47942765A US3362307A US 3362307 A US3362307 A US 3362307A US 479427 A US479427 A US 479427A US 47942765 A US47942765 A US 47942765A US 3362307 A US3362307 A US 3362307A
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United States
Prior art keywords
pressure
machine
smoothing
unit
control means
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Expired - Lifetime
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US479427A
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English (en)
Inventor
Domenighetti Domenico
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Individual
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Individual
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Priority to US479427A priority Critical patent/US3362307A/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • E01C19/4833—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ with tamping or vibrating means for consolidating or finishing, e.g. immersed vibrators, with or without non-vibratory or non-percussive pressing or smoothing means
    • E01C19/4853—Apparatus designed for railless operation, e.g. crawler-mounted, provided with portable trackway arrangements
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/14—Extendable screeds

Definitions

  • An asphalt spreader has a smoother which is pivotally mounted for vertical swinging movement on two arms and which is adjustably raised and lowered by means of a cylinder and piston carried by the machine and acting on a further arm which is pivotally mounted on the machine for vertical swinging movement and that is flexibly interconnected at its outer end with the rear end of the smoother.
  • the present invention relates to a device for controlling the pressure produced by the smoothing unit of roadway paving machines, also called vibrating finishing machines, over the bituminous material layer on which said smoothing unit rests.
  • This device pivoted to the machine frame, is applicable to roadway paving machines provided with smoothing mechanisms of the self-leveling type, and is comprised of at least one arm and tie rod producing on the smoothing unit itself a lifting force through the action of a fluid pressure operating mechanism.
  • FIGURE 1 is an elevational side view.
  • FIGURE 2 is an enlargement of the rear portion of the machine shown in FIGURE 1.
  • FIGURE 3 is a plan view of the machine shown in FIGURE 1.
  • FIGURE 4 shows the hydraulic diagram for the oleopneumatic control of the compensating device comprising the present invention.
  • the bituminous conglomerate vibrating finishing machine on which the device comprising the present invention is mounted, is essentially composed of a main body or frame 10, carrying the engine and all the moving parts, in the front of which there is a space intended to accommodate a bituminous conglomerate being unloaded from supplying motor-vehicles and to be spread onto the road.
  • a space is laterally defined by walls 7 and in the lower part by one or more conveying systems 9.
  • the machine is mounted on tired driving wheels 3 and on semi-pneumatic guide wheels 2.
  • thrust rollers 1 against which the wheels of the supplying material dump truck (not shown) rest, so that truck can be gradually driven towards the front of the finishing machine during the material feeding step.
  • Extensions such as 8 can be even more than one, sequentially arranged and connected to one another by hinges provided with means allowing said extensions to be locked at their final positions thereof.
  • said inclined hinges 14 can be readily disassembled in order to remove or to apply said extensions according to need.
  • a longitudinal horizontal channel intended to have the material pass therethrough, a desired quanity of said material being subsequently deposited on earth and then transversely distributed by the distributing Archimedian screws 4.
  • the smoothing unit 5 comes into operation, the function of said unit being essential since it has the function of regulating and keeping constant the thickness of the material layer spread by the machine.
  • the smoothing unit 5 is so designed as to eliminate as far as possible the effect of said vibrations on the finished layer.
  • the smoothing unit 5 is connected to the main frame 10 by means of two longitudinal arms 12, pivoted at 11.
  • unit 5 trails the main driving unit 10.
  • the length of arms 12, in combination with the suitable selection of the location of pivot 11, allows smoothing unit 5 to eliminate in a nearly complete manner the undesirable reproduction on the finished layer of the vibrations of the main body 10, due to the preexistent roadbed irregularities.
  • the smoothing unit 5 has to be constructed in a particular way, and precisely it has to be comprised of a wide smoothing surface 13,
  • G in the case of vibrating finishing machines in which the enlargements 8 are detachable, varies depending upon whether said enlargements are mounted or not; G remains instead always constant in those vibrating finishing machines having the enlargements 8 of the tiltable type; F increases according to the width of the layer it is desired to spread and its increase is generally not proportional to the eventual increase of G.
  • the device according to the present invention provides for the use of one or more arms 15, at one end pivoted to the main frame 10 of the machine, whereas the other end is connected through a chain 16 or other type of tie rod to the body of the smoothing unit 5.
  • a hydraulic cylinder 24 (FIGURES 2 and 4) pivoted at its end 24 on frame 10 and, by the end 17, of piston 17 to the arm 15, exerts on the latter a force which causes chain 16 to be subjected to tension.
  • the invention provides a hydraulic circuit as shown in FIGURE 4, in which reference numeral 18 designates a hydraulic fluid tank, 19 an intake conduit for said fluid, 20 a pump, 21 a high pressure delivery conduit, 22 a distributing valve capable of delivering oil both into a delivery conduit 23 and into an exhaust conduit 31, which sends the hydraulic fluid back into the tank 18.
  • the delivery conduit 23 is connected to the cylinder 24 of the piston 17.
  • a pressure-gauge 25 In the delivery conduit 23 or in conduit 21, there are inserted a pressure-gauge 25, a pressure regulator 26, manually adjustable by the machine operator and having the purpose of controlling the maximum pressure of fluid inside conduit 23; said regulator being provided with an exhaust conduit 27, to discharge part of fluid into the tank 18 so as to be able to perform its regulating function.
  • a pressure regulator 26 In the delivery conduit 23 or in conduit 21, there is also mounted an accumulating lung 28 containing a bladder 29 with inert gas, the volume of which is only slightly larger than the volume of cylinder 24.
  • the pressure of the inert gas, contained in bladder 29, is eventually adjustable as desired by means of valve 30.
  • This hydraulic system allows the operator, by controlling indications of pressure-gauge 25, to keep under control with maximum ease and accuracy the hydraulic fluid pressure inside of cylinder 24, the tensile stress transmitted from chain 16 to unit 5 and hence, according to the proposal of the present invention, pressure exerted by unit 5 in the various working conditions on the layer of bituminous material being spread by the machine.
  • a leveling unit having a smoothing surface, forwardly extending arms that support said leveling unit and that are pivoted to the sides of the machine body above said smoothing surface, an arm pivoted to the rear of said machine body and located above said forwardly extending arms, connecting means between said arm and said leveling unit, a hydraulic cylinder and piston pivoted one on said machine body and the other on said arm, and means for supplying hydraulic pressure to said cylinder comprising a pressure accumulator, said pressure accumulator comprising a lung and a gas-filled bladder therein, a pressure regulator for controlling the maximum pressure in said cylinder, and a gage for indicating said pressure in the hydraulic system.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Road Repair (AREA)
US479427A 1964-09-05 1965-08-13 Road paving machine with pressure control means Expired - Lifetime US3362307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US479427A US3362307A (en) 1964-09-05 1965-08-13 Road paving machine with pressure control means

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1161764A CH412957A (it) 1964-09-05 1964-09-05 Dispositivo per controllare la pressione esercitata dal gruppo livellatore vibrante di una macchina vibrofinitrice per pavimentazioni stradali
US479427A US3362307A (en) 1964-09-05 1965-08-13 Road paving machine with pressure control means

Publications (1)

Publication Number Publication Date
US3362307A true US3362307A (en) 1968-01-09

Family

ID=4375182

Family Applications (1)

Application Number Title Priority Date Filing Date
US479427A Expired - Lifetime US3362307A (en) 1964-09-05 1965-08-13 Road paving machine with pressure control means

Country Status (8)

Country Link
US (1) US3362307A (de)
AT (1) AT265351B (de)
BE (1) BE665365A (de)
CH (1) CH412957A (de)
DE (1) DE1534234A1 (de)
ES (1) ES312124A1 (de)
FR (1) FR1433267A (de)
GB (1) GB1090224A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5556227A (en) * 1994-04-21 1996-09-17 Joseph Vogele Ag Road finisher

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH564651A5 (de) * 1971-05-05 1975-07-31 Domenighetti Domenico
DE3124363A1 (de) * 1981-06-20 1982-12-30 Maschinenfabrik Klaus-Gerd Hoes GmbH & Co. KG, 2906 Wardenburg Verfahren und vorrichtung zur korrektur des anstellwinkels von breitenverstellbaren strassenfertigerbohlen
EP0235331A1 (de) * 1986-03-04 1987-09-09 SIMESA Socièta Italiana Montaggi e Servizi Affini S.p.A. Vorrichtung zur Kontrolle des Bodendruckes einer vibrierenden Planierungsvorrichtung eines vibrierenden Strassenfertigers
EP0513942B1 (de) * 1991-05-17 1996-02-21 Dynapac Gmbh Aushebeeinrichtung für einen Strassenfertiger
CN102444077A (zh) * 2011-11-01 2012-05-09 徐州万邦道路工程装备服务股份公司 一种摊铺机输料边保调节装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2295519A (en) * 1940-08-04 1942-09-08 Jaeger Machine Co Apparatus for surfacing roads
US2589257A (en) * 1948-07-01 1952-03-18 Jaeger Machine Co Road-finishing machine
US2847917A (en) * 1954-11-10 1958-08-19 Poor & Co Road surfacing machine
US2922345A (en) * 1955-06-06 1960-01-26 Alexander G Mentes Apparatus for automatically leveling material in the building of roads and the like

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2295519A (en) * 1940-08-04 1942-09-08 Jaeger Machine Co Apparatus for surfacing roads
US2589257A (en) * 1948-07-01 1952-03-18 Jaeger Machine Co Road-finishing machine
US2847917A (en) * 1954-11-10 1958-08-19 Poor & Co Road surfacing machine
US2922345A (en) * 1955-06-06 1960-01-26 Alexander G Mentes Apparatus for automatically leveling material in the building of roads and the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5556227A (en) * 1994-04-21 1996-09-17 Joseph Vogele Ag Road finisher

Also Published As

Publication number Publication date
AT265351B (de) 1968-10-10
CH412957A (it) 1966-05-15
ES312124A1 (es) 1965-10-01
FR1433267A (fr) 1966-03-25
GB1090224A (en) 1967-11-08
BE665365A (de) 1965-10-01
DE1534234A1 (de) 1969-07-31

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