GB1175319A - Improvements in or relating to Fluid Pressure-Operated Jacks. - Google Patents

Improvements in or relating to Fluid Pressure-Operated Jacks.

Info

Publication number
GB1175319A
GB1175319A GB4213468A GB4213468A GB1175319A GB 1175319 A GB1175319 A GB 1175319A GB 4213468 A GB4213468 A GB 4213468A GB 4213468 A GB4213468 A GB 4213468A GB 1175319 A GB1175319 A GB 1175319A
Authority
GB
United Kingdom
Prior art keywords
plate
load
ram
cylinder
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
GB4213468A
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.)
Hegenscheidt MFD GmbH and Co KG
Original Assignee
Hoesch Maschinenfabrik Deutschland AG
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 Hoesch Maschinenfabrik Deutschland AG filed Critical Hoesch Maschinenfabrik Deutschland AG
Publication of GB1175319A publication Critical patent/GB1175319A/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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1466—Hollow piston sliding over a stationary rod inside the cylinder
    • 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
    • B66F1/00—Devices, e.g. jacks, for lifting loads in predetermined steps
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Abstract

1,175,319. Fluid pressure step-by-step jacks. HOESCH MASCHINENFABRIK DEUTSCHLAND A.G. 4 Sept., 1968 [4 Nov., 1967], No. 42134/68. Heading B8J. A fluid pressure jack 10 arranged to operate with a stepped motion comprises a ram 15 slidable in a cylinder 14. A guide post 16 is set into base 141 of the cylinder 14 and its upper end forms a piston 161 dividing hollow chamber of the ram 15 into upper and lower chambers 151, 152, respectively. The guide post 16 has bores 162, 163 for the pressurized medium, the latter bore has a connection to cylinder chamber 142 through a bore 1411 in the base 141. The jack 10 rests on a movable carriage 11 which can be displaced by a drive unit 12, e.g. an hydraulic piston-cylinder device, mounted on a base-plate 13. The cylinder 14 has a releasable ring 17 secured to it, while a closure plate 18 covers the top of the ram 15. Both ring 17 and plate 18 have annular centring recesses 171, 181, respectively. When the pressure medium is introduced through bores 163, 1411 the jack 10 is fully extended as shown in Fig. 1. In this position load 19 on plate 18 is lifted sufficiently for a C-shaped support member 21 to be placed, by a rod 20, in position on ring 17, being centred by flange 212 mating with the recess 171, a plate 22 being centred on member 21 by a recessed portion 213. Ram 15 is then withdrawn, the load 19 being supported by the plate 22. With the jack 10 fully contracted, Fig. 3 (not shown), an annular ram extension member 23 with sealing plate 24 may be centred on the plate 18 and the load 19 raised by a further amount. This process is repeated until the load 19 has reached the desired height. The load 19 is lowered by reversing the above process.
GB4213468A 1967-11-04 1968-09-04 Improvements in or relating to Fluid Pressure-Operated Jacks. Expired GB1175319A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1531323 1967-11-04

Publications (1)

Publication Number Publication Date
GB1175319A true GB1175319A (en) 1969-12-23

Family

ID=5675477

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4213468A Expired GB1175319A (en) 1967-11-04 1968-09-04 Improvements in or relating to Fluid Pressure-Operated Jacks.

Country Status (2)

Country Link
FR (1) FR1590496A (en)
GB (1) GB1175319A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325212A (en) * 1997-05-07 1998-11-18 Humberside Lifting Services Li Lifting apparatus and a lifting method
WO2005093262A1 (en) * 2004-03-11 2005-10-06 Atkisek Corporation Innerscoping hydraulic system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325212A (en) * 1997-05-07 1998-11-18 Humberside Lifting Services Li Lifting apparatus and a lifting method
GB2325212B (en) * 1997-05-07 2001-04-11 Humberside Lifting Services Lt Improvements in or relating to a lifting apparatus and a method of lifting
WO2005093262A1 (en) * 2004-03-11 2005-10-06 Atkisek Corporation Innerscoping hydraulic system
US7448310B2 (en) 2004-03-11 2008-11-11 Atkisek Corporation Innerscoping hydraulic system

Also Published As

Publication number Publication date
FR1590496A (en) 1970-04-13

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years