FR2420061A1 - Double cylinder hydraulic shock absorber for vehicle - has raised hub in base of outer cylinder, with curved angles reducing cavitation noise - Google Patents

Double cylinder hydraulic shock absorber for vehicle - has raised hub in base of outer cylinder, with curved angles reducing cavitation noise

Info

Publication number
FR2420061A1
FR2420061A1 FR7906450A FR7906450A FR2420061A1 FR 2420061 A1 FR2420061 A1 FR 2420061A1 FR 7906450 A FR7906450 A FR 7906450A FR 7906450 A FR7906450 A FR 7906450A FR 2420061 A1 FR2420061 A1 FR 2420061A1
Authority
FR
France
Prior art keywords
base
shock absorber
hydraulic shock
vehicle
outer cylinder
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.)
Granted
Application number
FR7906450A
Other languages
French (fr)
Other versions
FR2420061B3 (en
Inventor
Vittorio Fogliacco
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.)
IAO Industrie Riunite SpA
Original Assignee
IAO Industrie Riunite SpA
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 IAO Industrie Riunite SpA filed Critical IAO Industrie Riunite SpA
Publication of FR2420061A1 publication Critical patent/FR2420061A1/en
Application granted granted Critical
Publication of FR2420061B3 publication Critical patent/FR2420061B3/fr
Granted 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
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The hydraulic shock absorber is of the double cylinder telescopic type, curves being introduced into various re-entrant angles to reduce cavitation noises. The two coaxial cylinders extend from a common head block, a metal cup (14) fitting the anular interval (20) to close the base of the outer cylinder, and the base of the inner cylinder being closed by a valve block (16). The inner cylinder is traversed by a piston (26) of which the rod passes through a head, and both the piston and the valve block are traversed by vertical passages (34, 38, 46, 56) controlled by diaphragm valving (36, 40, 48, 54). The invert of the base cup includes a raised coaxial hub (64) forming a circular groove (60) of segmental cross-section.
FR7906450A 1978-03-14 1979-03-14 Double cylinder hydraulic shock absorber for vehicle - has raised hub in base of outer cylinder, with curved angles reducing cavitation noise Granted FR2420061A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT67550/78A IT1107119B (en) 1978-03-14 1978-03-14 IMPROVEMENTS IN TELESCOPIC TYPE HYDRAULIC SHOCK ABSORBERS

Publications (2)

Publication Number Publication Date
FR2420061A1 true FR2420061A1 (en) 1979-10-12
FR2420061B3 FR2420061B3 (en) 1981-11-20

Family

ID=11303360

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7906450A Granted FR2420061A1 (en) 1978-03-14 1979-03-14 Double cylinder hydraulic shock absorber for vehicle - has raised hub in base of outer cylinder, with curved angles reducing cavitation noise

Country Status (3)

Country Link
ES (2) ES241995Y (en)
FR (1) FR2420061A1 (en)
IT (1) IT1107119B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228033A2 (en) * 1985-12-27 1987-07-08 Toyota Jidosha Kabushiki Kaisha Valve structure of hydraulic buffer
EP0497625A1 (en) * 1991-01-29 1992-08-05 Kayaba Kogyo Kabushiki Kaisha Shock absorber
DE19729289B4 (en) * 1997-07-09 2010-02-18 Zf Sachs Ag Damping valve for a hydropneumatic vibration damper

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0228033A2 (en) * 1985-12-27 1987-07-08 Toyota Jidosha Kabushiki Kaisha Valve structure of hydraulic buffer
EP0228033A3 (en) * 1985-12-27 1988-03-02 Toyota Jidosha Kabushiki Kaisha Valve structure of hydraulic buffer
EP0497625A1 (en) * 1991-01-29 1992-08-05 Kayaba Kogyo Kabushiki Kaisha Shock absorber
DE19729289B4 (en) * 1997-07-09 2010-02-18 Zf Sachs Ag Damping valve for a hydropneumatic vibration damper

Also Published As

Publication number Publication date
ES245274Y (en) 1980-06-16
IT1107119B (en) 1985-11-18
FR2420061B3 (en) 1981-11-20
ES241995Y (en) 1980-12-16
ES241995U (en) 1979-12-01
ES245274U (en) 1980-01-01
IT7867550A0 (en) 1978-03-14

Similar Documents

Publication Publication Date Title
GB1505702A (en) Lengthwise-adjustable gas spring
GB1314103A (en) Telescopic hydraulic damper
GB1535873A (en) Hydraulic jacks
GB1482160A (en) Piston/cylinder assemblies
GB877869A (en) Improvements relating to hydraulic piston apparatus
DE3378224D1 (en) Piston-cylinder assembly
FR2420061A1 (en) Double cylinder hydraulic shock absorber for vehicle - has raised hub in base of outer cylinder, with curved angles reducing cavitation noise
ES241996U (en) A shock hydraulic shock absorber. (Machine-translation by Google Translate, not legally binding)
GB1522758A (en) Hydraulic mine prop
ES8501497A1 (en) An hydraulic piston and cylinder assembly
GB1018092A (en) Improvements in or relating to hydraulic telescopic shock absorbers
FR2420693A1 (en) Hydraulic shock absorber for vehicle suspension - has annular outer space connected to inner cylinder and piston by valve
GB998742A (en) Improvements in or relating to telescopic shock absorbers
SE8202626L (en) PRESSURE AIR-DRIVED POWER CRAFT
GB1125104A (en) Improvements relating to variable rate dampers
FR2245865A1 (en) Ram for e.g. a shock absorber - cylinder and piston have complementary elliptical sections
JPS57177409A (en) Hydraulic cylinder for cab tilt
GB1440205A (en) Shock absorbers
GB1332463A (en) Guns
GB1411218A (en) Hydraulic stops for shock absorbers
GB1052680A (en)
JPS61164836U (en)
IT987728B (en) OIL BRAKE FOR DOORS
ATE44503T1 (en) ENERGY ABSORBER.
FR2426188A1 (en) Piston type hydraulic shock absorber - has drain passage starting from above base of leakage collector chamber