GB120988A - Improvements relating to Liquid or other Fluid Pressure Jacking Apparatus for Motor Vehicles. - Google Patents

Improvements relating to Liquid or other Fluid Pressure Jacking Apparatus for Motor Vehicles.

Info

Publication number
GB120988A
GB120988A GB1792417A GB1792417A GB120988A GB 120988 A GB120988 A GB 120988A GB 1792417 A GB1792417 A GB 1792417A GB 1792417 A GB1792417 A GB 1792417A GB 120988 A GB120988 A GB 120988A
Authority
GB
United Kingdom
Prior art keywords
ram
port
fluid
pressure
jack
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
GB1792417A
Inventor
Edmund Graham
George Bowman
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 GB1792417A priority Critical patent/GB120988A/en
Publication of GB120988A publication Critical patent/GB120988A/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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

120,988. Graham, E., and Bowman, G. Dec. 4, 1917. Jacks.-The ram of a fluid - pressure - actuated jack for motor-vehicles is returned by fluid pressure or by suction. The space 16, Fig. 1, between the outer wall of the ram 3 and the inner wall of the jack casing 4 is closed by glands 14. 15, and fluid under pressure is admitted to this space by the port 17. The ram is actuated by fluid admitted through the port 22, and, during its outward movement, the fluid in the space 16 is forced through the port 19 into the cylinder 18, where it compresses the spring 21 and is retained until it is desired to return the ram. The cylinder 18 may be dispensed and fluid under pressure from a pump may be used to return the ram. In a modification, the port 17 is dispensed with and the ram is returned by connecting the port 22 to a vacuum chamber. The pressure within the jack may be maintained by a valve on the supply pipe when the pressure supply is cut off. The necessity for accurately boring the jack casing 4 is avoided by arranging the packing-gland 15 so that it bears on the outer wall of the ram below the end of the casing. Specification 115,724, [Class 79 (iii), Motor-vehicles, Arrangement &c. of parts of], is referred to.
GB1792417A 1917-12-04 1917-12-04 Improvements relating to Liquid or other Fluid Pressure Jacking Apparatus for Motor Vehicles. Expired GB120988A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1792417A GB120988A (en) 1917-12-04 1917-12-04 Improvements relating to Liquid or other Fluid Pressure Jacking Apparatus for Motor Vehicles.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1792417A GB120988A (en) 1917-12-04 1917-12-04 Improvements relating to Liquid or other Fluid Pressure Jacking Apparatus for Motor Vehicles.

Publications (1)

Publication Number Publication Date
GB120988A true GB120988A (en) 1918-12-04

Family

ID=32347769

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1792417A Expired GB120988A (en) 1917-12-04 1917-12-04 Improvements relating to Liquid or other Fluid Pressure Jacking Apparatus for Motor Vehicles.

Country Status (1)

Country Link
GB (1) GB120988A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104709843A (en) * 2015-02-12 2015-06-17 嘉善海力达工具有限公司 Piston rod reset mechanism of jack and jack

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104709843A (en) * 2015-02-12 2015-06-17 嘉善海力达工具有限公司 Piston rod reset mechanism of jack and jack
CN104709843B (en) * 2015-02-12 2016-10-19 嘉善海力达工具有限公司 The piston rod resetting-mechanism of jack and jack

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