DE1931627B2 - Hydraulic telescopic ram - Google Patents

Hydraulic telescopic ram

Info

Publication number
DE1931627B2
DE1931627B2 DE19691931627 DE1931627A DE1931627B2 DE 1931627 B2 DE1931627 B2 DE 1931627B2 DE 19691931627 DE19691931627 DE 19691931627 DE 1931627 A DE1931627 A DE 1931627A DE 1931627 B2 DE1931627 B2 DE 1931627B2
Authority
DE
Germany
Prior art keywords
hydraulic telescopic
telescopic ram
ram
hydraulic
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
DE19691931627
Other languages
German (de)
Other versions
DE1931627A1 (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.)
Gewerkschaft Eisenhutte Westfalia GmbH
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 filed Critical
Priority to DE19691931627 priority Critical patent/DE1931627B2/en
Publication of DE1931627A1 publication Critical patent/DE1931627A1/en
Publication of DE1931627B2 publication Critical patent/DE1931627B2/en
Granted legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14Telescopic props
    • E21D15/44Hydraulic, pneumatic, or hydraulic-pneumatic props
DE19691931627 1969-06-21 1969-06-21 Hydraulic telescopic ram Granted DE1931627B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19691931627 DE1931627B2 (en) 1969-06-21 1969-06-21 Hydraulic telescopic ram

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19691931627 DE1931627B2 (en) 1969-06-21 1969-06-21 Hydraulic telescopic ram
GB4753169A GB1280899A (en) 1969-06-21 1969-09-26 Improvements in hydraulic props
US3656411D US3656411A (en) 1969-06-21 1969-10-10 Telescopic props
JP44089049A JPS4923441B1 (en) 1969-06-21 1969-11-06
FR6944323A FR2030920A5 (en) 1969-06-21 1969-12-22

Publications (2)

Publication Number Publication Date
DE1931627A1 DE1931627A1 (en) 1971-01-07
DE1931627B2 true DE1931627B2 (en) 1977-06-30

Family

ID=5737686

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691931627 Granted DE1931627B2 (en) 1969-06-21 1969-06-21 Hydraulic telescopic ram

Country Status (5)

Country Link
US (1) US3656411A (en)
JP (1) JPS4923441B1 (en)
DE (1) DE1931627B2 (en)
FR (1) FR2030920A5 (en)
GB (1) GB1280899A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103527223A (en) * 2013-11-05 2014-01-22 姜星柱 Mine single hydraulic prop capable of extending and retracting oppositely

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760704A (en) * 1971-12-30 1973-09-25 Polaroid Corp Reflex camera and viewer with a folded optical path
US3961559A (en) * 1974-11-18 1976-06-08 Hiroshi Teramachi Actuator
JPS5293669U (en) * 1976-01-12 1977-07-13
JPS56160449U (en) * 1980-04-30 1981-11-30
US4516468A (en) * 1983-01-10 1985-05-14 Hydraulic Technology Corporation Double acting telescopic cylinder construction
JPS6143865U (en) * 1984-08-23 1986-03-22
US5209154A (en) * 1990-11-08 1993-05-11 Allied-Signal Inc. Dual area brake actuation piston mechanism
US5953967A (en) * 1996-05-28 1999-09-21 Junkers; John Fluid-operated cylinder-piston unit, and a tool provided therewith
US5927178A (en) * 1997-11-24 1999-07-27 Diebolt International, Inc. Press driven tool actuator module
JP4262879B2 (en) * 2000-10-10 2009-05-13 カヤバ工業株式会社 Lift cylinder
US6557456B2 (en) * 2001-05-24 2003-05-06 The Raymond Corporation Cushioned actuator
CN101105133B (en) * 2007-07-27 2010-05-19 中国矿业大学 Double extension suspended type hydraulic vertical prop
CN101984220A (en) * 2010-05-28 2011-03-09 金湖小青青机电设备有限公司 Double flexible suspension hydraumatic upright column
CN105020197A (en) * 2015-07-24 2015-11-04 芜湖市银鸿液压件有限公司 Composite type bidirectional hydraulic dam ascending oil cylinder and use method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2172117A (en) * 1938-05-02 1939-09-05 John M Beaufort Radio antenna
US2378409A (en) * 1942-03-18 1945-06-19 Joseph F Joy Hydraulic elevating mechanism
US2517153A (en) * 1946-08-16 1950-08-01 Gar Wood Ind Inc Telescopic power down hoist
US2813515A (en) * 1955-04-28 1957-11-19 Joy Mfg Co Telescopic uniform pressure providing apparatus
GB977800A (en) * 1962-08-21 1964-12-16 Electro Hydraulics Ltd Improvements in or relating to mine roof supports
BE655844A (en) * 1963-11-29 1965-03-16

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103527223A (en) * 2013-11-05 2014-01-22 姜星柱 Mine single hydraulic prop capable of extending and retracting oppositely

Also Published As

Publication number Publication date
FR2030920A5 (en) 1970-11-13
DE1931627A1 (en) 1971-01-07
GB1280899A (en) 1972-07-05
JPS4923441B1 (en) 1974-06-15
US3656411A (en) 1972-04-18

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
8327 Change in the person/name/address of the patent owner

Owner name: GEWERKSCHAFT EISENHUETTE WESTFALIA GMBH, 4670 LUEN

8339 Ceased/non-payment of the annual fee