GB768698A - Improvements in or relating to shock absorbers for aircraft - Google Patents

Improvements in or relating to shock absorbers for aircraft

Info

Publication number
GB768698A
GB768698A GB13160/54A GB1316054A GB768698A GB 768698 A GB768698 A GB 768698A GB 13160/54 A GB13160/54 A GB 13160/54A GB 1316054 A GB1316054 A GB 1316054A GB 768698 A GB768698 A GB 768698A
Authority
GB
United Kingdom
Prior art keywords
ports
damping
liquid
spring
head
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
GB13160/54A
Inventor
George Orloff
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.)
British Messier Ltd
Original Assignee
British Messier 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 British Messier Ltd filed Critical British Messier Ltd
Priority to GB13160/54A priority Critical patent/GB768698A/en
Publication of GB768698A publication Critical patent/GB768698A/en
Expired 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
    • F16F9/50—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface 
    • B64C25/58—Arrangements or adaptations of shock-absorbers or springs
    • B64C25/60—Oleo legs
    • 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
    • F16F9/5126—Piston, or piston-like valve elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface 
    • B64C2025/325—Alighting gear characterised by elements which contact the ground or similar surface  specially adapted for helicopters

Landscapes

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

Abstract

768,698. Liquid springs. BRITISH MESSIER, Ltd. April 12, 1955 [May 5, 1954], No. 13160/54. Class 108(3). A shock absorber comprises a cylinder completely filled with liquid in which works a plunger 23 carrying a damping head 25, and having ports 46, 47, connecting opposed sides of the head 25, and a control member 48 for the ports 46, 47, such as to afford, " linear " damping to slow loadyielding movements of the plunger, and a greater rate of damping for more rapid load-yielding movements. The control member 48 comprises spaced pistons 40, 53 operating in a con centric bore 45 of the plunger 23 disposec between the ports 46 47. The control mem ber 48 also carries a valve head 41 which is loaded by the action of a spring 52 to seat in the mouth of the port 47. The head 41 is formed with ports 61 covered by a valve plate 43 under the action of a spring 44. In operation, on slow compression movement, the valve plate 43 is lifted against the action of the spring 44 and liquid flows through the ports 61 with, " linear " damping. The liquid then flows through ports 50 in the piston 40 of the control member 48 and out through ports 46 to the space below the damping piston 25. On more rapid compression movement, the control member 48 is moved downwardly against the pressure of the spring 52 and damping flow occurs through the ports 50 according to a " square law." On rebound, liquid flows from below the piston 25 to above, via ports 54, under the control of a non-return valve formed by a coiled strip 55. A cylinder 20 is filled with liquid at super-atmospheric pressure through a screw plug 60. The invention may be applied to a helicopter undercarriage similar to that described in Specification 745,915.
GB13160/54A 1954-05-05 1954-05-05 Improvements in or relating to shock absorbers for aircraft Expired GB768698A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB13160/54A GB768698A (en) 1954-05-05 1954-05-05 Improvements in or relating to shock absorbers for aircraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13160/54A GB768698A (en) 1954-05-05 1954-05-05 Improvements in or relating to shock absorbers for aircraft

Publications (1)

Publication Number Publication Date
GB768698A true GB768698A (en) 1957-02-20

Family

ID=10017968

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13160/54A Expired GB768698A (en) 1954-05-05 1954-05-05 Improvements in or relating to shock absorbers for aircraft

Country Status (1)

Country Link
GB (1) GB768698A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122731A1 (en) * 1983-04-08 1984-10-24 WESTLAND plc Suspension damper for helicopter undercarriage and helicopter incorporating same
GB2191843A (en) * 1986-06-12 1987-12-23 Hollingsworth Uk Ltd Vibration damper
US11187299B1 (en) * 2021-03-30 2021-11-30 Ningbo Fenghua Rising New Energy Technology Co., Ltd. Bidirectional self-locking damper
AU2021277686B2 (en) * 2021-03-30 2023-08-03 Ningbo Fenghua Rising New Energy Technology Co., Ltd Bidirectional self-locking damper

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122731A1 (en) * 1983-04-08 1984-10-24 WESTLAND plc Suspension damper for helicopter undercarriage and helicopter incorporating same
GB2191843A (en) * 1986-06-12 1987-12-23 Hollingsworth Uk Ltd Vibration damper
GB2191843B (en) * 1986-06-12 1989-12-20 Hollingsworth Uk Ltd Vibration damper
US11187299B1 (en) * 2021-03-30 2021-11-30 Ningbo Fenghua Rising New Energy Technology Co., Ltd. Bidirectional self-locking damper
EP4040009A4 (en) * 2021-03-30 2023-01-11 Ningbo Fenghua Rising New Energy Technology Co., Ltd. Bidirectional self-locking damper
AU2021277686B2 (en) * 2021-03-30 2023-08-03 Ningbo Fenghua Rising New Energy Technology Co., Ltd Bidirectional self-locking damper

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