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GB1310948A - Oil pressure jack for lifting operations - Google Patents

Oil pressure jack for lifting operations

Info

Publication number
GB1310948A
GB1310948A GB2624270A GB2624270A GB1310948A GB 1310948 A GB1310948 A GB 1310948A GB 2624270 A GB2624270 A GB 2624270A GB 2624270 A GB2624270 A GB 2624270A GB 1310948 A GB1310948 A GB 1310948A
Authority
GB
United Kingdom
Prior art keywords
cylinder
jacks
piston
rod
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
GB2624270A
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.)
JFE Kizai Forming Co Ltd
Original Assignee
Kawatetsu Kizai Kogyo Co Ltd
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
Priority claimed from JP8208369A external-priority patent/JPS5139018B1/ja
Application filed by Kawatetsu Kizai Kogyo Co Ltd filed Critical Kawatetsu Kizai Kogyo Co Ltd
Publication of GB1310948A publication Critical patent/GB1310948A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0836—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks
    • E02B17/0854—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks with clamping wedges, eccentric clamping devices and so on
    • 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
    • B66F3/30—Constructional features with positive brakes or locks

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Actuator (AREA)

Abstract

1310948 Step-by-step jacks KAWATETSU KIZAI KOGYO CO Ltd 1 June 1970 [4 June 1969 13 Oct 1969] 26242/70 Heading B8J A step-by-step hydraulic jack A comprises a piston-rod 1 attached to a piston 2 sliding in a cylinder 3. Similar clamps 5, 9 are respectively attached to the rod 1 and the cylinder 3. Each clamp, e.g. 5 has a number of segments 6 urged upwards by a spring 8 into engagement with conical surface with which the assembled segments 6 mate. The jack climbs a rod 13 having stop shoulders 14 with which the clamps 5, 9 co-operate. The shoulders 14 are protected inside the jack by a guide 4. A number of the jacks may be used in parallel in construction work. E.g. as shown in Fig. 2 three rods 13 are suspended from a supporting structure 15 through piston and cylinder load equalizers 16. The cylinder chambers 19 of the load equalizers 16 are interconnected by conduits 20, 20a, 20b, 20c, initially pressurized before starting operations and then isolated by valves 21, 22 to ensure even sharing of the load (not shown) between the jacks.
GB2624270A 1969-06-04 1970-06-01 Oil pressure jack for lifting operations Expired GB1310948A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4427069 1969-06-04
JP8208369A JPS5139018B1 (en) 1969-10-13 1969-10-13

Publications (1)

Publication Number Publication Date
GB1310948A true GB1310948A (en) 1973-03-21

Family

ID=26384120

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2624270A Expired GB1310948A (en) 1969-06-04 1970-06-01 Oil pressure jack for lifting operations

Country Status (3)

Country Link
DE (1) DE2027605A1 (en)
FR (1) FR2049876A5 (en)
GB (1) GB1310948A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101230750B (en) * 2007-01-23 2011-02-09 上海海塔机械制造有限公司 Core-passing type self-raising complete-fluid pressure step hoister and method for hoisting construction platform
CN108821080A (en) * 2018-08-22 2018-11-16 北京奇力建通工程技术有限公司 Lifting traction device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10003711A1 (en) * 2000-01-28 2001-08-02 Mayr Christian Gmbh & Co Kg Hydraulic clamp locking itself in slide bar grooves to apply closure pressure to mold, comprises casing around bar with internal spring-loaded pistons and locking segments

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101230750B (en) * 2007-01-23 2011-02-09 上海海塔机械制造有限公司 Core-passing type self-raising complete-fluid pressure step hoister and method for hoisting construction platform
CN108821080A (en) * 2018-08-22 2018-11-16 北京奇力建通工程技术有限公司 Lifting traction device

Also Published As

Publication number Publication date
DE2027605A1 (en) 1971-04-08
FR2049876A5 (en) 1971-03-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee