GB579294A - Improvements in locking arrangements for telescopic jacks - Google Patents

Improvements in locking arrangements for telescopic jacks

Info

Publication number
GB579294A
GB579294A GB356444A GB356444A GB579294A GB 579294 A GB579294 A GB 579294A GB 356444 A GB356444 A GB 356444A GB 356444 A GB356444 A GB 356444A GB 579294 A GB579294 A GB 579294A
Authority
GB
United Kingdom
Prior art keywords
sleeve
spring
tongues
locking
engage
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
GB356444A
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 GB356444A priority Critical patent/GB579294A/en
Publication of GB579294A publication Critical patent/GB579294A/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

Abstract

579,294. Hydraulic machines. DOWTY EQUIPMENT, Ltd., DOWTY, G. H., and BASTOW, F. Feb. 25, 1944, No. 3564. [Class 69 (ii)] Locking means for one or both extremes of movement of a telescopic jack comprises spring tongues 10 carried by the cylinder arranged to spring outwardly to engage a locking member 12 on the plunger and to be secured in locking position by a sleeve 13. The sleeve is spring-loaded and its movement limited by stops 15, 16. As the piston approaches the end of its stroke, the spring tongues engage the member 12 and move radially outwardly to' contact and press backwardly the sleeve 13 until the tongues spring into the groove 16, the sleeve is then returned under spring pressure to the locking position. Unlocking is effected by the application of fluid pressure which moves the sleeve 13 axially, or by cable or other mechanical means. Specification 568,582 is referred to.
GB356444A 1944-02-25 1944-02-25 Improvements in locking arrangements for telescopic jacks Expired GB579294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB356444A GB579294A (en) 1944-02-25 1944-02-25 Improvements in locking arrangements for telescopic jacks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB356444A GB579294A (en) 1944-02-25 1944-02-25 Improvements in locking arrangements for telescopic jacks

Publications (1)

Publication Number Publication Date
GB579294A true GB579294A (en) 1946-07-30

Family

ID=9760719

Family Applications (1)

Application Number Title Priority Date Filing Date
GB356444A Expired GB579294A (en) 1944-02-25 1944-02-25 Improvements in locking arrangements for telescopic jacks

Country Status (1)

Country Link
GB (1) GB579294A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2702024A (en) * 1950-07-24 1955-02-15 Electro Hydraulics Ltd Automatic mechanical locking device for telescopic jacks
US2744501A (en) * 1953-05-18 1956-05-08 Boeing Co Toggle lock actuator assembly
US2771060A (en) * 1952-06-27 1956-11-20 Dunlop Rubber Co Locking mechanism for fluid pressure operated devices
US2876746A (en) * 1954-10-26 1959-03-10 Hartford Special Machinery Co Fluid actuated jack with pressure responsive automatic lock
DE1159152B (en) * 1960-09-30 1963-12-12 Clemco Aero Products Inc Hydraulic lifting cylinder with mechanical locking device for the piston in the end positions

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2702024A (en) * 1950-07-24 1955-02-15 Electro Hydraulics Ltd Automatic mechanical locking device for telescopic jacks
US2771060A (en) * 1952-06-27 1956-11-20 Dunlop Rubber Co Locking mechanism for fluid pressure operated devices
US2744501A (en) * 1953-05-18 1956-05-08 Boeing Co Toggle lock actuator assembly
US2876746A (en) * 1954-10-26 1959-03-10 Hartford Special Machinery Co Fluid actuated jack with pressure responsive automatic lock
DE1159152B (en) * 1960-09-30 1963-12-12 Clemco Aero Products Inc Hydraulic lifting cylinder with mechanical locking device for the piston in the end positions

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