FR2456706A1 - Pneumatic or hydraulic lifting jack - has inflatable envelope lifting shaft mounted inside rigid cylinder which is closed at one end - Google Patents

Pneumatic or hydraulic lifting jack - has inflatable envelope lifting shaft mounted inside rigid cylinder which is closed at one end

Info

Publication number
FR2456706A1
FR2456706A1 FR7912385A FR7912385A FR2456706A1 FR 2456706 A1 FR2456706 A1 FR 2456706A1 FR 7912385 A FR7912385 A FR 7912385A FR 7912385 A FR7912385 A FR 7912385A FR 2456706 A1 FR2456706 A1 FR 2456706A1
Authority
FR
France
Prior art keywords
envelope
closed
pneumatic
mounted inside
rigid 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.)
Granted
Application number
FR7912385A
Other languages
French (fr)
Other versions
FR2456706B1 (en
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 FR7912385A priority Critical patent/FR2456706A1/en
Publication of FR2456706A1 publication Critical patent/FR2456706A1/en
Application granted granted Critical
Publication of FR2456706B1 publication Critical patent/FR2456706B1/fr
Granted 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
    • B66F3/35—Inflatable flexible elements, e.g. bellows

Abstract

A rigid cylinder (1) is closed at the base (11) and contains an inflatable elastic envelope (2). A lifting shaft (3) rests on the upper surface of the envelope so that the envelope surrounds the base of the shaft. As the envelope is inflated the shaft is raised. Cords are moulded into the envelope to limit its travel during inflation. A guide ring (4) mounted at the upper extremity of the cylinder ensures smooth travel of the shaft. The envelope can be inflated by air, water, oil etc.
FR7912385A 1979-05-16 1979-05-16 Pneumatic or hydraulic lifting jack - has inflatable envelope lifting shaft mounted inside rigid cylinder which is closed at one end Granted FR2456706A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7912385A FR2456706A1 (en) 1979-05-16 1979-05-16 Pneumatic or hydraulic lifting jack - has inflatable envelope lifting shaft mounted inside rigid cylinder which is closed at one end

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7912385A FR2456706A1 (en) 1979-05-16 1979-05-16 Pneumatic or hydraulic lifting jack - has inflatable envelope lifting shaft mounted inside rigid cylinder which is closed at one end

Publications (2)

Publication Number Publication Date
FR2456706A1 true FR2456706A1 (en) 1980-12-12
FR2456706B1 FR2456706B1 (en) 1984-09-28

Family

ID=9225510

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7912385A Granted FR2456706A1 (en) 1979-05-16 1979-05-16 Pneumatic or hydraulic lifting jack - has inflatable envelope lifting shaft mounted inside rigid cylinder which is closed at one end

Country Status (1)

Country Link
FR (1) FR2456706A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523107A1 (en) * 1982-03-08 1983-09-16 Bauakademie Ddr CYLINDRICAL LIFTING DEVICE
FR2722819A1 (en) * 1994-07-19 1996-01-26 Hedin Jean Luc Wedge or pressure element for two adjacent structural components, used in civil engineering
US5669739A (en) * 1995-07-05 1997-09-23 Hl & H Timber Products (Proprietary) Limited Prestressing of mine props

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1375332A (en) * 1920-04-17 1921-04-19 Stephens Clyde Pneumatic jack and pump
US1414835A (en) * 1920-08-24 1922-05-02 Gregory J Spohrer Vehicle dumping and jacking means
FR554853A (en) * 1922-05-23 1923-06-19 Improvements to pneumatic jacks, shock absorbers, or similar devices
US1492158A (en) * 1922-06-06 1924-04-29 Caretta Ettore Lifting jack
US2692618A (en) * 1951-09-19 1954-10-26 Ludowici Johann Wilhelm Diaphragmed piston and cylinder construction
FR1364685A (en) * 1963-05-13 1964-06-26 Pneumatic lifting device
FR1530481A (en) * 1967-04-20 1968-06-28 Thermodynamic jack
DE2550898A1 (en) * 1975-11-13 1977-05-18 Horst Jansen Hydraulic lifting jack - has elastic hollow body with fluid connection and wall acting against lifting member
US4079915A (en) * 1977-08-10 1978-03-21 Donald C. Mountain Hydro-power jack

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1375332A (en) * 1920-04-17 1921-04-19 Stephens Clyde Pneumatic jack and pump
US1414835A (en) * 1920-08-24 1922-05-02 Gregory J Spohrer Vehicle dumping and jacking means
FR554853A (en) * 1922-05-23 1923-06-19 Improvements to pneumatic jacks, shock absorbers, or similar devices
US1492158A (en) * 1922-06-06 1924-04-29 Caretta Ettore Lifting jack
US2692618A (en) * 1951-09-19 1954-10-26 Ludowici Johann Wilhelm Diaphragmed piston and cylinder construction
FR1364685A (en) * 1963-05-13 1964-06-26 Pneumatic lifting device
FR1530481A (en) * 1967-04-20 1968-06-28 Thermodynamic jack
DE2550898A1 (en) * 1975-11-13 1977-05-18 Horst Jansen Hydraulic lifting jack - has elastic hollow body with fluid connection and wall acting against lifting member
US4079915A (en) * 1977-08-10 1978-03-21 Donald C. Mountain Hydro-power jack

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523107A1 (en) * 1982-03-08 1983-09-16 Bauakademie Ddr CYLINDRICAL LIFTING DEVICE
FR2722819A1 (en) * 1994-07-19 1996-01-26 Hedin Jean Luc Wedge or pressure element for two adjacent structural components, used in civil engineering
US5669739A (en) * 1995-07-05 1997-09-23 Hl & H Timber Products (Proprietary) Limited Prestressing of mine props

Also Published As

Publication number Publication date
FR2456706B1 (en) 1984-09-28

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Legal Events

Date Code Title Description
ST Notification of lapse