GB587460A - Improvements in lifting jacks and the like - Google Patents

Improvements in lifting jacks and the like

Info

Publication number
GB587460A
GB587460A GB12033/44A GB1203344A GB587460A GB 587460 A GB587460 A GB 587460A GB 12033/44 A GB12033/44 A GB 12033/44A GB 1203344 A GB1203344 A GB 1203344A GB 587460 A GB587460 A GB 587460A
Authority
GB
United Kingdom
Prior art keywords
fluid
screw
cylinder
piston
nut
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
GB12033/44A
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical 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
Application filed by Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB12033/44A priority Critical patent/GB587460A/en
Publication of GB587460A publication Critical patent/GB587460A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B64C25/24—Operating mechanisms electric
    • 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
    • B64C25/26—Control or locking systems therefor
    • B64C25/30—Control or locking systems therefor emergency actuated
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

587,460. Lifting - jacks. VANCE, W. G. C., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. June 23, 1944, No. 12023. [Class 78(iii)] [Also in Group XXXIII] A screw jack, particularly for actuating the landing gear of an aircraft, is normally operated by hand or by power but can be operated in an emergency by fluid under pressure. As shown, the screw 3 is carried by a head 5 attached by a lug 1 to one member and is normally actuated through reducing gear by hand or by an electric motor 13 through a clutch 14 whilst the nut 6 forms part of the end of a fluid-tight cylinder 7 secured to the other member by a lug 2. The screw and nut may be of the ball-track type. In an emergency, a sealed cartridge containing oil under pressure, compressed air or gas is broken or fired electrically to admit fluid under pressure to act on a piston 15 carried by the screw 3. The fluid is admitted to the cylinder either through a hole in the lower end or preferably through the screw which is hollow. The fluid pressure is also transmitted through a pipe 18 to a cylinder 20 to disengage the clutch 14, and in addition may be utilised to disengage mechanical latches and/or braking means comprising springs which, are normally released electromagnetically. The nut 6 may carry a piston 23 operating in a dust excluding cylinder 8, fluid being supplied to the cylinder by leakage or by a separate pipe. If emergency operation of the jack in the reverse direction is required additional fluid pipes are connected above the piston 15 and below the piston 23.
GB12033/44A 1944-06-23 1944-06-23 Improvements in lifting jacks and the like Expired GB587460A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB12033/44A GB587460A (en) 1944-06-23 1944-06-23 Improvements in lifting jacks and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12033/44A GB587460A (en) 1944-06-23 1944-06-23 Improvements in lifting jacks and the like

Publications (1)

Publication Number Publication Date
GB587460A true GB587460A (en) 1947-04-25

Family

ID=9997200

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12033/44A Expired GB587460A (en) 1944-06-23 1944-06-23 Improvements in lifting jacks and the like

Country Status (1)

Country Link
GB (1) GB587460A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013184656A1 (en) 2012-06-04 2013-12-12 Aero Controlex Group Inc. Blow down actuator assembly
EP2927506A1 (en) * 2014-04-01 2015-10-07 The Boeing Company Pneumatic positioning system
CN108116666A (en) * 2017-11-28 2018-06-05 北京特种机械研究所 The reliable locking method of electric retractable actuating cylinder
US10683880B2 (en) 2012-06-04 2020-06-16 Aero Controlex Group Inc. Blow down actuator assembly having a drag brake
EP3721116A4 (en) * 2017-12-08 2021-07-21 Aerocontrolex Group, Inc. Blow down actuator assembly having a drag brake
JP7546865B2 (en) 2021-06-03 2024-09-09 多摩川精機株式会社 Electric actuators for aircraft landing gear

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10458442B2 (en) 2012-06-04 2019-10-29 Aero Controlex Group Inc. Blow down actuator assembly
JP2015525168A (en) * 2012-06-04 2015-09-03 アエロ コントロレックス グループ インコーポレイテッド Blowdown actuator assembly
US10920801B2 (en) 2012-06-04 2021-02-16 Aerocontrolex Group Inc. Blow down actuator assembly
WO2013184656A1 (en) 2012-06-04 2013-12-12 Aero Controlex Group Inc. Blow down actuator assembly
EP2855261A4 (en) * 2012-06-04 2017-03-08 Aerocontrolex Group, Inc. Blow down actuator assembly
US9790969B2 (en) 2012-06-04 2017-10-17 Aero Controlex Group Inc. Blow down actuator assembly
US10683880B2 (en) 2012-06-04 2020-06-16 Aero Controlex Group Inc. Blow down actuator assembly having a drag brake
CN104973238A (en) * 2014-04-01 2015-10-14 波音公司 Pneumatic positioning system
CN104973238B (en) * 2014-04-01 2018-11-13 波音公司 Pneumatic Position System
EP2927506A1 (en) * 2014-04-01 2015-10-07 The Boeing Company Pneumatic positioning system
CN108116666A (en) * 2017-11-28 2018-06-05 北京特种机械研究所 The reliable locking method of electric retractable actuating cylinder
EP3721116A4 (en) * 2017-12-08 2021-07-21 Aerocontrolex Group, Inc. Blow down actuator assembly having a drag brake
JP7546865B2 (en) 2021-06-03 2024-09-09 多摩川精機株式会社 Electric actuators for aircraft landing gear

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