GB487909A - Improvements in or relating to jacks - Google Patents

Improvements in or relating to jacks

Info

Publication number
GB487909A
GB487909A GB13374/37A GB1337437A GB487909A GB 487909 A GB487909 A GB 487909A GB 13374/37 A GB13374/37 A GB 13374/37A GB 1337437 A GB1337437 A GB 1337437A GB 487909 A GB487909 A GB 487909A
Authority
GB
United Kingdom
Prior art keywords
piston
ram
ports
hand side
register
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
GB13374/37A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB487909A publication Critical patent/GB487909A/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
    • F15B15/202—Externally-operated valves mounted in or on the actuator
    • 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
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages

Abstract

487,909. Jacks; hydraulic load-handling machines. MERCIER, J. May 11, 1937, No. 13374. Convention date, May 11, 1936. [Class 78 (iii)] [Also in Group XXIX] Control mechanism for hydraulic or pneumatic jacks is mounted on the moving ram. Fig. 2 shows one construction in which a ram 2, carrying a piston 3 fitted with packing on both sides, moves in relation to a fixed cylinder 1 and applies a pulling or pushing force to a member attached to the eye 5. A lever 6 on one end of the ram may be operated by hand or power or automatically by devices such as thermostats or speed indicators to control the position of a sliding sleeve 16 through a connecting link 25. When the sleeve is moved towards the left, the ports 17 and 18 are brought into register to admit fluid from the pipe 11 to the right-hand side of the piston through the duct 19, thus moving the ram to the left. Meanwhile fluid from the left-hand side of the piston is expelled through the ducts 21, 20 to the exhaust pipe 12 passing through the ports 23, 24 which are brought into register by the same movement. On moving the sleeve to the right, ports 17 and 18 come into register to admit fluid to the left-hand side of the piston to move the ram towards the left, and the fluid from the other side escapes through duct 19 and ports 24<1>, 23'. Movement of the ram in either direction ceases whenever the handle 6 is brought to a central position. In the modified form shown in Fig. 1, the piston 3 is moved by power in one direction only, i.e. towards the left, and is returned automatically by the pressure in a reservoir 15. In this case the pivoted lever 6 controls two spring valves 8, 9 simultaneously so that in one position it establishes communication between the pressure main 11 and the right-hand side of the piston and in the opposite position opens up communication between the piston and the exhaust pipe 12. The jack is particularly adapted for operating the wing flaps and retractable radiators of aircraft.
GB13374/37A 1936-05-11 1937-05-11 Improvements in or relating to jacks Expired GB487909A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE487909X 1936-05-11

Publications (1)

Publication Number Publication Date
GB487909A true GB487909A (en) 1938-06-28

Family

ID=3870524

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13374/37A Expired GB487909A (en) 1936-05-11 1937-05-11 Improvements in or relating to jacks

Country Status (1)

Country Link
GB (1) GB487909A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633102A (en) * 1950-12-18 1953-03-31 Weston Hydraulics Ltd Irreversible hydraulic pressure power actuator
US2657777A (en) * 1951-06-06 1953-11-03 Paul M Smith Vacuum brake apparatus
DE1131379B (en) * 1955-05-13 1962-06-14 Renault Air operated lifting device
DE1292351B (en) * 1962-11-13 1969-04-10 Hydraulik As Hydraulic control device for a hydraulic winch drive
US4114743A (en) * 1976-05-03 1978-09-19 Dana Corporation Fluid actuated operator and clutch linkage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633102A (en) * 1950-12-18 1953-03-31 Weston Hydraulics Ltd Irreversible hydraulic pressure power actuator
US2657777A (en) * 1951-06-06 1953-11-03 Paul M Smith Vacuum brake apparatus
DE1131379B (en) * 1955-05-13 1962-06-14 Renault Air operated lifting device
DE1292351B (en) * 1962-11-13 1969-04-10 Hydraulik As Hydraulic control device for a hydraulic winch drive
US4114743A (en) * 1976-05-03 1978-09-19 Dana Corporation Fluid actuated operator and clutch linkage

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