GB922157A - Improvements in and relating to telescopic struts - Google Patents

Improvements in and relating to telescopic struts

Info

Publication number
GB922157A
GB922157A GB5158/58A GB515858A GB922157A GB 922157 A GB922157 A GB 922157A GB 5158/58 A GB5158/58 A GB 5158/58A GB 515858 A GB515858 A GB 515858A GB 922157 A GB922157 A GB 922157A
Authority
GB
United Kingdom
Prior art keywords
adapter
supplied
relating
hydraulic pit
tube
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
GB5158/58A
Inventor
Hans Otto Smerd
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.)
Parsons Chain Co Ltd
Original Assignee
Parsons Chain Co 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
Priority to BE635504D priority Critical patent/BE635504A/xx
Application filed by Parsons Chain Co Ltd filed Critical Parsons Chain Co Ltd
Priority to GB5158/58A priority patent/GB922157A/en
Publication of GB922157A publication Critical patent/GB922157A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/30—Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber
    • E21D15/306—Telescopic props with parts held relatively to each other by friction or gripping by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid, e.g. rubber by means of a liquid
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/58—Devices for setting props or chocks
    • E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
    • E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
    • E21D15/588—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded the lock also being activated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/262—Locking mechanisms using friction, e.g. brake pads

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

922,157. Hydraulic pit-props. PARSONS CHAIN CO. Ltd. May 15, 1959 [Feb. 17, 1958], No. 5158/58. Class 20 (2). [Also in Group XXIX] An hydraulic pit-prop or strut for incorporation in the undercarriage of an aircraft comprises a tube 2 which is telescopically mounted in an outer tube 1 and provided with an hydraulically - actuated brake device 4, an upper ram 3 and an adapter 9. The unit 4 consists of an annular rubber bag 15 which acts on arcuate brake shoes 18 and is supplied with pressure fluid through an inlet 27, the adapter 9 and a length of annealed copper tubing 24 having a helical portion 25. The inlets 27, 28 of the members 4, 3, respectively, are supplied in parallel from a common pump through a circuit incorporating suitable check and control valves for details of which Fig. 3 (not shown) and Specification 744,899 should be referred to.
GB5158/58A 1958-02-17 1958-02-17 Improvements in and relating to telescopic struts Expired GB922157A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE635504D BE635504A (en) 1958-02-17
GB5158/58A GB922157A (en) 1958-02-17 1958-02-17 Improvements in and relating to telescopic struts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5158/58A GB922157A (en) 1958-02-17 1958-02-17 Improvements in and relating to telescopic struts

Publications (1)

Publication Number Publication Date
GB922157A true GB922157A (en) 1963-03-27

Family

ID=9790777

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5158/58A Expired GB922157A (en) 1958-02-17 1958-02-17 Improvements in and relating to telescopic struts

Country Status (2)

Country Link
BE (1) BE635504A (en)
GB (1) GB922157A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3220686A (en) * 1962-10-19 1965-11-30 Guardian Mining Props Ltd Telescopic pit prop
FR2519386A1 (en) * 1981-12-31 1983-07-08 Bosq Sylvette Self locking pneumatic actuator - has three chambers and brake jaw to give dual direction movement or locking of piston
EP0106947A1 (en) * 1982-10-22 1984-05-02 Mannesmann Rexroth Pneumatik Gmbh Double acting ram
EP0141215A1 (en) * 1983-10-26 1985-05-15 WABCO Westinghouse Steuerungstechnik GmbH & Co. Fluid pressure actuator having a piston cushioning device in final positions

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3220686A (en) * 1962-10-19 1965-11-30 Guardian Mining Props Ltd Telescopic pit prop
FR2519386A1 (en) * 1981-12-31 1983-07-08 Bosq Sylvette Self locking pneumatic actuator - has three chambers and brake jaw to give dual direction movement or locking of piston
EP0106947A1 (en) * 1982-10-22 1984-05-02 Mannesmann Rexroth Pneumatik Gmbh Double acting ram
EP0141215A1 (en) * 1983-10-26 1985-05-15 WABCO Westinghouse Steuerungstechnik GmbH & Co. Fluid pressure actuator having a piston cushioning device in final positions

Also Published As

Publication number Publication date
BE635504A (en)

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