GB655341A - Improvements in or relating to hydraulic jacks - Google Patents

Improvements in or relating to hydraulic jacks

Info

Publication number
GB655341A
GB655341A GB22303/47A GB2230347A GB655341A GB 655341 A GB655341 A GB 655341A GB 22303/47 A GB22303/47 A GB 22303/47A GB 2230347 A GB2230347 A GB 2230347A GB 655341 A GB655341 A GB 655341A
Authority
GB
United Kingdom
Prior art keywords
ram
cylinder
fixed cylinder
april
relating
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
GB22303/47A
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 GB655341A publication Critical patent/GB655341A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E21D15/15—Means counteracting entry of dirt; Built-in cleaning devices
    • E21D15/155—Built-in cleaning devices
    • 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
    • B66F3/26—Adaptations or arrangements of pistons
    • B66F3/28—Adaptations or arrangements of pistons telescopic

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Actuator (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Gasket Seals (AREA)

Abstract

655,341. Piston packing. GRATZMULLER, J. L. Aug 11, 1947, Nos. 22303, 22304 and 22305. Convention dates, April 18, 1946, April 19, 1946 and May 4, 1946. [Class 122(i)] [Also in Group XXXI In a hydraulic jack of the telescoping type comprising a fixed cylinder 13, a ram cylinder 11 having a loose fit in said fixed cylinder, and a ram 6 having a loose fit in said ram cylinder, both the ram and ram cylinder are formed integrally with a portion of reduced external diameter at their inner ends, annular members 1 mounted on said reduced portions for guiding the ram cylinder in the fixed cylinder and the ram in the ram cylinder carry packings 2 forming a seal between said fixed cylinder and between said ram respectively.
GB22303/47A 1946-04-18 1947-08-11 Improvements in or relating to hydraulic jacks Expired GB655341A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR655341X 1946-04-18

Publications (1)

Publication Number Publication Date
GB655341A true GB655341A (en) 1951-07-18

Family

ID=9007063

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22303/47A Expired GB655341A (en) 1946-04-18 1947-08-11 Improvements in or relating to hydraulic jacks

Country Status (1)

Country Link
GB (1) GB655341A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2649524A1 (en) * 1976-08-20 1978-02-23 Telehoist Ltd TELESCOPIC DEVICE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2649524A1 (en) * 1976-08-20 1978-02-23 Telehoist Ltd TELESCOPIC DEVICE
FR2362297A1 (en) * 1976-08-20 1978-03-17 Telehoist Ltd ADVANCED TELESCOPIC DEVICES

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