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GB755078A - Improvements relating to liquid pressure operated jacks - Google Patents

Improvements relating to liquid pressure operated jacks

Info

Publication number
GB755078A
GB755078A GB2527654A GB2527654A GB755078A GB 755078 A GB755078 A GB 755078A GB 2527654 A GB2527654 A GB 2527654A GB 2527654 A GB2527654 A GB 2527654A GB 755078 A GB755078 A GB 755078A
Authority
GB
United Kingdom
Prior art keywords
piston
liquid
cylinder
jack
bore
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
GB2527654A
Inventor
Richard Northam Knights
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.)
Dowty Equipment Ltd
Original Assignee
Dowty Equipment 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 Dowty Equipment Ltd filed Critical Dowty Equipment Ltd
Priority to GB2527654A priority Critical patent/GB755078A/en
Publication of GB755078A publication Critical patent/GB755078A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/02—Undercarriages
    • B64C25/08—Undercarriages non-fixed, e.g. jettisonable
    • B64C25/10—Undercarriages non-fixed, e.g. jettisonable retractable, foldable, or the like
    • B64C25/18—Operating mechanisms
    • B64C25/22—Operating mechanisms fluid
    • 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 
    • B64C25/50—Steerable undercarriages; Shimmy-damping

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Abstract

755,078. Hydraulic jacks. DOWTY EQUIPMENT, Ltd. Aug. 31, 1954, No. 25276/54. Class 69 (2). A jack for steering an aircraft nosewheel is centred by an annular piston 26 sliding in an extension 5 of the main cylinder 1, the extension being of larger diameter than that of the main cylinder. The jack piston 10 is moved to the left by liquid supplied through a bore 17, and is moved to the right by liquid supplied through a bore 15. Liquid is supplied to the cylinder 5 through a bore 32. In one embodiment, in which the cylinder 1 has a fixed end wall 8, the jack is centred by the admission of liquid to chambers B and C, whereupon the piston 10 and piston rod 13 will move to the left until a stop 29 on the rod 13 engages the piston 26 which is held by the liquid pressure against an end flange 25 of the cylinder 5. Liquid pressure on the larger area of the piston 26 ensures that the piston 26 will retain the piston 10 in its central position. In a second embodiment, in which the end wall 8 is movable, the piston 10 is centralized by supplying only the chamber C with liquid and connecting chambers A and B to exhaust. The wall 8 will thereupon be moved into engagement with the piston 10 and the piston 26 will engage the flange 25 of the cylinder 5. The stop 29 will again abut the piston 26 and centralize the piston 10.
GB2527654A 1954-08-31 1954-08-31 Improvements relating to liquid pressure operated jacks Expired GB755078A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2527654A GB755078A (en) 1954-08-31 1954-08-31 Improvements relating to liquid pressure operated jacks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2527654A GB755078A (en) 1954-08-31 1954-08-31 Improvements relating to liquid pressure operated jacks

Publications (1)

Publication Number Publication Date
GB755078A true GB755078A (en) 1956-08-15

Family

ID=10225095

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2527654A Expired GB755078A (en) 1954-08-31 1954-08-31 Improvements relating to liquid pressure operated jacks

Country Status (1)

Country Link
GB (1) GB755078A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3213758A1 (en) * 1981-04-16 1983-01-27 Autóipari Kutató Intézet, Budapest Pneumatic three-position shift drive, especially for shifting the stages of gearboxes
WO2001071197A1 (en) * 2000-03-21 2001-09-27 Hydroll Oy A hydraulic arrangement and a damper adapted thereto

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3213758A1 (en) * 1981-04-16 1983-01-27 Autóipari Kutató Intézet, Budapest Pneumatic three-position shift drive, especially for shifting the stages of gearboxes
WO2001071197A1 (en) * 2000-03-21 2001-09-27 Hydroll Oy A hydraulic arrangement and a damper adapted thereto

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