GB1124357A - Improvements in hydraulic damping devices - Google Patents

Improvements in hydraulic damping devices

Info

Publication number
GB1124357A
GB1124357A GB5247465A GB5247465A GB1124357A GB 1124357 A GB1124357 A GB 1124357A GB 5247465 A GB5247465 A GB 5247465A GB 5247465 A GB5247465 A GB 5247465A GB 1124357 A GB1124357 A GB 1124357A
Authority
GB
United Kingdom
Prior art keywords
piston
valve
flange
spring
opening
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
Application number
GB5247465A
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.)
SCHWEIZ WAGONS AUFZUEGEFAB
Original Assignee
SCHWEIZ WAGONS AUFZUEGEFAB
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 SCHWEIZ WAGONS AUFZUEGEFAB filed Critical SCHWEIZ WAGONS AUFZUEGEFAB
Publication of GB1124357A publication Critical patent/GB1124357A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/02—Door or gate operation
    • B66B13/06—Door or gate operation of sliding doors
    • B66B13/08—Door or gate operation of sliding doors guided for horizontal movement
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • 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
    • F16F9/48—Arrangements for providing different damping effects at different parts of the stroke
    • F16F9/486—Arrangements for providing different damping effects at different parts of the stroke comprising a pin or stem co-operating with an aperture, e.g. a cylinder-mounted stem co-operating with a hollow piston rod
    • 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
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/104—Application of doors, windows, wings or fittings thereof for buildings or parts thereof for elevators

Landscapes

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

Abstract

1,124,357. Hydraulic damping devices. SCHWEIZERISCHE WAGONS - UND AUFZUGEFABRIK A.G. 10 Dec., 1965 [16 Dec., 1964], No. 52474/65. Heading F2S. In an hydraulic damping device, e.g. for an automatic door closing device, the liquid flow through a piston 13 from one variable volume chamber 11 or 12 in a cylinder 10 to the other variable volume chamber 12 or 11 is controlled by a spring-loaded bobbin-shaped valve 23 which has end flanges 20, 22 which slidably engage the walls of a cavity 15 in a central body portion 13a in the piston 13, the flange 22 controlling the flow of liquid through radial passages 18 in the piston body portion 13a, and by a metering needle 26 which is fixed to the base of the cylinder 10 and co-operates with a central opening 21 in the flange 20 of the valve 23. As a piston-rod 14 moves out of the cylinder 10 against the action, e.g. of a door closing- spring, not shown, liquid flows from the upper chamber 11 to the lower chamber 12 through a set of radial passages 17 in the upper end of the piston 13, the metered opening 21 and into the hollow interior of the valve 23 from which it escapes through radial passages 24 in the valve 23 and through the radial passages 18 which are fully open, the valve 23 being urged downward to abut a bottom plate 16 of the valve 23 by the combined force of a loading spring 25 and the pressure differential developed across the opening 21. In this manner little resistance is offered by the damping device to an opening movement of the door. On a closing movement of the door, liquid flows in the reverse direction, the flow of liquid through the opening 21 becoming progressively smaller and the passages 18 being closed by the valve flange 22 by an amount corresponding to the degree of superiority of the lifting force, due to pressure differential across the opening 21, over the downward force of the spring 25, the lifting force being a function of the velocity of the piston 13. The piston 13 also carries a safety valve 28. The flange 22 may be located on the other side of the flange 20. A non-apertured flange 22 may be employed, in which case a tubular member, having an inner surface whose cross-section varies axially, is interposed between a smaller diameter-flange 20 and the wall of the cavity 15. The metering needle 26, which modifies the point of equilibrium between the force by the liquid on the flange 20 and opposing force of the spring 25, is replaced by one of constant diameter when a non-linear characteristic spring 25 is employed to modify the equilibrium point. In a modification, Fig. 3 (not shown), the chambers (11, 12) communicate through an external duct (18), a valve (22) in which is regulated according to the hydraulic lifting force on a disc (20), which works in a cavity (15), and the opposing force of a spring (25), a metering pin (26) which is associated with an opening (21) in the disc (20) being carried by the piston-rod (14) of the piston (13) which works in a cylinder (10) and which is fitted with a safety valve.
GB5247465A 1964-12-16 1965-12-10 Improvements in hydraulic damping devices Expired GB1124357A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1630064A CH427418A (en) 1964-12-16 1964-12-16 Hydraulic shock absorber

Publications (1)

Publication Number Publication Date
GB1124357A true GB1124357A (en) 1968-08-21

Family

ID=4416116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5247465A Expired GB1124357A (en) 1964-12-16 1965-12-10 Improvements in hydraulic damping devices

Country Status (6)

Country Link
AT (1) AT266644B (en)
BE (1) BE673859A (en)
CH (1) CH427418A (en)
DE (1) DE1269841B (en)
FR (1) FR1466595A (en)
GB (1) GB1124357A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140020996A1 (en) * 2012-07-19 2014-01-23 Zf Friedrichshafen Ag Vibration Damper With Frequency-Selective Damping Force

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4284177A (en) * 1979-05-14 1981-08-18 Efdyn Corporation Self-adjusting shock absorber having staged metering
DE4243645A1 (en) * 1992-12-23 1994-06-30 Dorma Gmbh & Co Kg Spring twist compensation for vehicle door closer
WO2006029421A1 (en) * 2004-09-17 2006-03-23 Julius Blum Gmbh Fluid damper
CN106523574B (en) * 2016-10-13 2018-04-13 湖南大学 A kind of multi-state damping adaptive hydro-pneumatic spring and its control method
US10612617B2 (en) 2018-01-02 2020-04-07 Goodrich Corporation Shock strut percolation
CN111288109B (en) * 2020-03-25 2021-11-09 东风小康汽车有限公司重庆分公司 Damping piston assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224306A (en) * 1939-11-02 1940-12-10 Cleveland Pneumatic Tool Co Shock absorbing device
DE869717C (en) * 1951-02-08 1953-03-05 Hemscheidt Maschf Hermann Connection between piston body and piston skirt, especially for hydraulic telescopic vibration dampers
NL96246C (en) * 1954-04-16

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140020996A1 (en) * 2012-07-19 2014-01-23 Zf Friedrichshafen Ag Vibration Damper With Frequency-Selective Damping Force
US9091318B2 (en) * 2012-07-19 2015-07-28 Zf Friedrichshafen Ag Vibration damper with frequency-selective damping force

Also Published As

Publication number Publication date
AT266644B (en) 1968-11-25
FR1466595A (en) 1967-01-20
BE673859A (en) 1966-06-16
DE1269841B (en) 1968-06-06
CH427418A (en) 1966-12-31

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