GB193790A - Improvements in jacks - Google Patents

Improvements in jacks

Info

Publication number
GB193790A
GB193790A GB2396922A GB2396922A GB193790A GB 193790 A GB193790 A GB 193790A GB 2396922 A GB2396922 A GB 2396922A GB 2396922 A GB2396922 A GB 2396922A GB 193790 A GB193790 A GB 193790A
Authority
GB
United Kingdom
Prior art keywords
piston
pump
channels
head
cylinder
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
GB2396922A
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
Priority to GB2396922A priority Critical patent/GB193790A/en
Publication of GB193790A publication Critical patent/GB193790A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Reciprocating Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

193,790. Harper, J. L. Sept. 4, 1922. Jacks.-A fluid-pressure-actuated jack comprises a cylinder 1 formed integral with a base plate 3, a tubular piston 2, and a pump 26 which is pivotally connected to the piston and can also be used as a handle for positioning the jack. Tubes 10, 11 connect the cylinder and piston, respectively, to channels 12, 13 in a head 14 which closes the piston. The channels 12, 13 are connected by a passage 16 and are provided with ball check valves 21, 20. The passage 16 communicates with an annular channel 17 formed in the wall of a transverse bore 18 which receives the tapered shank 29, Fig. 3, of the head 28 of the pump cylinder. The channels 12, 13 are connected also by a by-pass 22 provided with a valve 23 having a projecting stem 24 which can be pressed inwardly by depressing the pump so as to bring the pin 50 on the head 28 into contact with it. The pump preferably comprises two tubular sections 26, 27 which are pivotally connected by elbows 33, 35, Fig. 4, having means for maintaining the sections in the same plane.
GB2396922A 1922-09-04 1922-09-04 Improvements in jacks Expired GB193790A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2396922A GB193790A (en) 1922-09-04 1922-09-04 Improvements in jacks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2396922A GB193790A (en) 1922-09-04 1922-09-04 Improvements in jacks

Publications (1)

Publication Number Publication Date
GB193790A true GB193790A (en) 1923-03-01

Family

ID=10204301

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2396922A Expired GB193790A (en) 1922-09-04 1922-09-04 Improvements in jacks

Country Status (1)

Country Link
GB (1) GB193790A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2444357A1 (en) * 2010-10-22 2012-04-25 MVP (HK) Industries. Ltd. Handle system for bottle jack

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2444357A1 (en) * 2010-10-22 2012-04-25 MVP (HK) Industries. Ltd. Handle system for bottle jack

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