GB707636A - Improvements in or relating to automatic mechanical locking devices for telescopic jacks - Google Patents

Improvements in or relating to automatic mechanical locking devices for telescopic jacks

Info

Publication number
GB707636A
GB707636A GB1861749A GB1861749A GB707636A GB 707636 A GB707636 A GB 707636A GB 1861749 A GB1861749 A GB 1861749A GB 1861749 A GB1861749 A GB 1861749A GB 707636 A GB707636 A GB 707636A
Authority
GB
United Kingdom
Prior art keywords
latch
bolt
ring
relating
july
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
GB1861749A
Inventor
Harry Balshaw Caldwell
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.)
Electro Hydraulics Ltd
Original Assignee
Electro Hydraulics 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 Electro Hydraulics Ltd filed Critical Electro Hydraulics Ltd
Priority to GB1861749A priority Critical patent/GB707636A/en
Publication of GB707636A publication Critical patent/GB707636A/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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/30—Constructional features with positive brakes or locks

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)

Abstract

707,636. Pneumatic single-stroke apparatus. ELECTRO-HYDRAULICS, Ltd. July 7, 1950 [July 14, 1949], No. 18617/49. Class 8 (2). [ Also in Group XXIX] In an automatic locking device for telescopic jacks comprising a latch 7, a locking ring 12 forming an abutment through or over which the latch 7 is capable of sliding, and a spring- biased lock bolt 14 adapted to hold the latch 7 fixed and thus prevent it from sliding back through the ring 12, the latch 7 is formed of a plurality of rigid segments 25 which rock over a fulcrum e.g., a ring 9 with rounded edges without contacting the cylinder wall so as to engage the bolt 14, which latter is movable with respect to the latch 7. The bolt 14 and latch 7 are positively locked by co-operating tapers 27, 28 engagement of which is indicated by movement of a plunger 19 displaced by a bolt actuated cam 18. The latch 7 together with a similar latch 8, are secured to a rod 5 on each side of the jack piston 6 and engage one or other of locking rings 12, 13 and bolts 14, 15 at the ends of the cylinder 1.
GB1861749A 1949-07-14 1949-07-14 Improvements in or relating to automatic mechanical locking devices for telescopic jacks Expired GB707636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1861749A GB707636A (en) 1949-07-14 1949-07-14 Improvements in or relating to automatic mechanical locking devices for telescopic jacks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1861749A GB707636A (en) 1949-07-14 1949-07-14 Improvements in or relating to automatic mechanical locking devices for telescopic jacks

Publications (1)

Publication Number Publication Date
GB707636A true GB707636A (en) 1954-04-21

Family

ID=10115523

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1861749A Expired GB707636A (en) 1949-07-14 1949-07-14 Improvements in or relating to automatic mechanical locking devices for telescopic jacks

Country Status (1)

Country Link
GB (1) GB707636A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163680B (en) * 1954-11-17 1964-02-20 Dunlop Rubber Co Locking device for an actuator
CN102197230A (en) * 2008-10-28 2011-09-21 Snpe巨能材料公司 Triggered-travel jack for a safety system
CN104632780A (en) * 2014-12-05 2015-05-20 四川凌峰航空液压机械有限公司 U-shaped opening clamping ring lock for actuator cylinder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1163680B (en) * 1954-11-17 1964-02-20 Dunlop Rubber Co Locking device for an actuator
CN102197230A (en) * 2008-10-28 2011-09-21 Snpe巨能材料公司 Triggered-travel jack for a safety system
US8813495B2 (en) 2008-10-28 2014-08-26 Herakles Triggered-travel jack for a safety system
CN104632780A (en) * 2014-12-05 2015-05-20 四川凌峰航空液压机械有限公司 U-shaped opening clamping ring lock for actuator cylinder

Similar Documents

Publication Publication Date Title
GB1403466A (en) Shoring jack
GB573033A (en) Improvements in locking means for telescopic jacks
GB704797A (en) Improvement in tire vulcanizing press with automatic bagging mechanism
GB707636A (en) Improvements in or relating to automatic mechanical locking devices for telescopic jacks
GB1231670A (en)
GB652546A (en) A device for restraining return motion
GB779968A (en) Improvements in or relating to drive mechanisms for use with lifting jacks
GB565127A (en) Improvements in fluid-operated jacks for use more especially for operating aircraft auxiliaries
GB579294A (en) Improvements in locking arrangements for telescopic jacks
GB688686A (en) Improvements in or relating to automatic mechanical locking devices for telescopic jacks
GB680575A (en) Improvements in groundlocks for fluid pressure operated jacks provided with internal locks
GB781772A (en) Thrust mechanism for advancing coal extracting machinery towards a coal face
GB603865A (en) Improvements relating to hydraulic or pneumatic jacks
CH501816A (en) Device for locking the pivoting movement of the operating lever of a fitting, in particular a lifting door fitting, by means of a cylinder lock
GB706982A (en) Improvements in or relating to hydraulic props and jacks, especially pit props
GB1500271A (en) Lift safety device
SU73479A1 (en) Miner wedge stand
GB638585A (en) Improvements in or relating to cylinders for reciprocating pumps
GB527225A (en) Automatic locking device for pistons or other movable parts
GB629922A (en) Improvements in or relating to locking devices
GB568582A (en) Improvements in internal lock means for telescopic jacks
GB781723A (en) Improvements in and relating to the production of pre-stressed reinforced concrete
GB633989A (en) Improvements in or relating to metallic pit-props
GB755078A (en) Improvements relating to liquid pressure operated jacks
GB663330A (en) Improvements in or relating to vacuum brake cylinders