EP0265458A1 - Cellule de resistance au mouvement lineaire amelioree - Google Patents

Cellule de resistance au mouvement lineaire amelioree

Info

Publication number
EP0265458A1
EP0265458A1 EP19870902352 EP87902352A EP0265458A1 EP 0265458 A1 EP0265458 A1 EP 0265458A1 EP 19870902352 EP19870902352 EP 19870902352 EP 87902352 A EP87902352 A EP 87902352A EP 0265458 A1 EP0265458 A1 EP 0265458A1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
disc
linear motion
resistance cell
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.)
Withdrawn
Application number
EP19870902352
Other languages
German (de)
English (en)
Inventor
Reginald Trethewey
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.)
Comdox No 70 Pty Ltd
Original Assignee
Comdox No 70 Pty Ltd
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 Comdox No 70 Pty Ltd filed Critical Comdox No 70 Pty Ltd
Publication of EP0265458A1 publication Critical patent/EP0265458A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/00058—Mechanical means for varying the resistance
    • A63B21/00069—Setting or adjusting the resistance level; Compensating for a preload prior to use, e.g. changing length of resistance or adjusting a valve
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/008—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using hydraulic or pneumatic force-resisters
    • A63B21/0083—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using hydraulic or pneumatic force-resisters of the piston-cylinder type
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/08—Characteristics of used materials magnetic

Definitions

  • the present invention therefore provides a linear motion resistance cell comprising an hydraulic piston and cylinder assembly sealed at both ends and filled with 35 hydraulic fluid, the piston incorporating valve means operable to control the flow of fluid from one side of the piston to the other and hence the resistance to movement
  • valve means comprising a disc rotatable about the axis of the cylinder relative to the piston and incorporating ports moveable into and out of register with ports in the piston, the
  • the flow of fluid through the piston is arranged such that reversal of piston movement causes the
  • the ports in the piston and the disc are arranged such that axial movement of the disc between the flanges acts as a non-return valve, opening and/or closing selected ports to the flow of fluid therethrough.
  • the cylinder is provided with a volume compensator arranged to compensate for the decrease in contained volume within the cylinder as the piston is advanced into the cylinder under the influence of an actuation rod.
  • a linear 0 motion resistance cell is formed in the configuration of a hydraulic piston and cylinder assembly having a tubular cylinder wall (1) closed by an upper end cap (2) and a lower end cap (3).
  • the lower end cap (3) is closed and the upper end cap (2) is provided with a seal (30) forming 5 a sliding fit with a piston actuation rod (9).
  • the end caps (2) and (3) are conveniently held in place on the cylindrical tube (1) by way of tie rods (14) and (.15).
  • the piston actuation rod (9) is arranged to support and actuate a piston for linear movement within the 0 cylinder.
  • the piston is formed in two halves in the form of an upper flange (6) and a lower flange (7) interconnected by a central spigot (31) ( Figure 2) engageable about a reduced end portion (32) on the actuation rod (9) and held in place by a threaded nut
  • the piston is further provided with a valve disc (8) located between the flanges (6) and (7) and being of such thickness that there is an axial clearance between the
  • valve block (8) can float axially relative to the piston, flow of fluid through the ports in the piston serves to force the valve block against the
  • the cut-out gate (17) is arranged to provide a clear opening to any of the ports (18), (19), (20) or (21) when aligned therewith, but the restriction gates (15) and (16) have spiral inner edges arranged such that the inner edge progressively closes an aligned port during rotation of the disc (8) relative to the piston over the arc of the restriction ports. In this manner the degree of resistance to the flow of fluid through a port aligned 0- with the restriction gates (15) or (16) may be controlled by rotation of the disc using the magnets (12).
  • valve block within the piston has been designed to achieve the same three types of selectable resistance to movement as those described in
  • valve block (8) are rotated so that valve block (8) rotates until the restriction gates (15) and (16) align with ports (18) and (20).
  • valve block (8) engages with the inner face of the upper piston half (6) thus sealing port (19). Fluid is then forced to travel past the restriction gate (15) into port (18). At the same time the lower face of valve block (8) disengages with the inner face of the lower piston
  • valve block (8) engages with the inner face of the lower piston half (7) thus sealing port (21). Fluid is then forced to travel past the restriction gate (16) into port (20). At the same time the upper face of valve block
  • valve block (8) In this mode valve block (8) is rotated so restriction gate (16) aligns with port (21).
  • valve block (8) engages with the inner face of lower piston half (7) thus sealing port (20). Fluid is then
  • valve block (8) disengages with the inner face of the upper piston half (6). allowing fluid to be introduced through ports (18) and (19).
  • Valve block (8) is rotated so restriction gate (15) aligns with port (19) and the operation is the reverse of the previous mode.
  • the cylinder is also supplied with a floating piston (4) to allow for internal volume changes due to the
  • 4037S/rs floating piston (4) is loaded by a powerful spring (5). Because the cross-sectional area of the shaft (9) is about one sixteenth the area of the piston halves (6) and (7) it is relatively easy to compress the spring (5) by introducing more of the shaft (9) into the cylinder.
  • valve block (8) is adjusted so no fluid can pass from the lower side of the piston half (7) to the upper side of the piston half (6), then the shaft load required to compress spring (5) is very high.
  • the action 0 of the floating piston (4) and the spring (5) form a return mechanism that causes the cylinder to attain its extended position when unloaded.
  • volume compensation apparatus works well to compensate for volume 5 changes due to the introduction of the actuation rod (9) into the cylinder it has been found in practice that the floating piston (4) and spring (5) can introduce unacceptable levels of sponginess in the down pressure stroke of the cylinder shaft.
  • a sealed, air filled, plastic bladder (29) is contained in the space (25) on the lower side of the valved piston (22).
  • On the lower surface of the O-ring groove (28) is a plurality of small holes (26) that communicate with the space (25).
  • O-ring (23) prevents oil flow between the valved piston (22) and the cylinder (1).

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)

Abstract

Une cellule de résistance au mouvement linéaire, particulièrement appropriée pour être utilisée sur un exerciseur comprend un ensemble à piston hydraulique (6, 7) et à cylindre (1) rempli de fluide hydraulique et pourvu d'orifices réglables ménagés dans le piston entre un disque rotatif (8) et les embases (6) et (7) du piston. Les orifices sont ouverts et fermés par rotation du disque (8) par rapport au piston, actionné par des paires d'aimants (10, 11) diamétralement opposées, disposées dans le disque et alignées sur des paires d'aimants correspondantes (12, 13) disposées dans un anneau à l'extérieur dudit cylindre (1).
EP19870902352 1986-04-30 1987-04-30 Cellule de resistance au mouvement lineaire amelioree Withdrawn EP0265458A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU5671/86 1986-04-30
AU567186 1986-04-30

Publications (1)

Publication Number Publication Date
EP0265458A1 true EP0265458A1 (fr) 1988-05-04

Family

ID=3696152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870902352 Withdrawn EP0265458A1 (fr) 1986-04-30 1987-04-30 Cellule de resistance au mouvement lineaire amelioree

Country Status (2)

Country Link
EP (1) EP0265458A1 (fr)
WO (1) WO1987006666A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5250015A (en) * 1990-03-22 1993-10-05 Thornton John C Hydraulic exercise apparatus having a main cylinder and a displacement cylinder
GB2283075A (en) * 1993-10-23 1995-04-26 Ford Motor Co Hydraulic damper
FR2955261B1 (fr) * 2010-01-18 2013-03-08 Sveltus Pompe / verin pour dispositif destine a faire travailler simultanement des muscles antagonistes, comportant essentiellement un verin a eau ou autre fluide capable de travailler en traction puis en compression, dispositif correspondant comportant des moyens de contact avec le corps ou de manoeuvre, ledit dispositif et applications correspondantes en gymnastique, musculation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR802633A (fr) * 1935-05-27 1936-09-09 Perfectionnement apporté aux amortisseurs télescopiques
GB460851A (en) * 1935-07-31 1937-02-01 Noel Banner Newton Improvements in or relating to piston-type hydraulic shock absorbers
FR1294113A (fr) * 1960-07-08 1962-05-26 Tatra Np Soupape d'amortissement électromagnétique pour véhicules automobiles
DE1405781B1 (de) * 1960-12-01 1970-06-18 Armstrong Patents Co Ltd Elektrisch fernsteuerbarer hydraulischer Stossdaempfer,insbesondere fuer Landfahrzeuge
GB8321728D0 (en) * 1983-08-12 1983-09-14 Horng Meei Spring Exercising apparatus
AU4297385A (en) * 1984-04-24 1985-11-15 Comdox No. 70 Pty. Ltd. Linear motion resistance cell
DE3432465A1 (de) * 1984-09-04 1986-03-13 Boge Gmbh, 5208 Eitorf Regelbares daempfungsventil fuer einen hydraulischen schwingungsdaempfer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8706666A1 *

Also Published As

Publication number Publication date
WO1987006666A1 (fr) 1987-11-05

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Legal Events

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

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Effective date: 19880202

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Inventor name: TRETHEWEY, REGINALD