GB1065559A - Improvements in hydraulic pit props - Google Patents

Improvements in hydraulic pit props

Info

Publication number
GB1065559A
GB1065559A GB48314/64A GB4831464A GB1065559A GB 1065559 A GB1065559 A GB 1065559A GB 48314/64 A GB48314/64 A GB 48314/64A GB 4831464 A GB4831464 A GB 4831464A GB 1065559 A GB1065559 A GB 1065559A
Authority
GB
United Kingdom
Prior art keywords
section
working chamber
piston
hydraulic pit
nov
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
GB48314/64A
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.)
Rheinstahl Wanheim GmbH
Original Assignee
Rheinstahl Wanheim 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
Priority claimed from DER36680A external-priority patent/DE1231194B/en
Application filed by Rheinstahl Wanheim GmbH filed Critical Rheinstahl Wanheim GmbH
Publication of GB1065559A publication Critical patent/GB1065559A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0069—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices without essential advancing shifting devices
    • 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
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • 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
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Fluid-Damping Devices (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

1,065,559. Multi-stage hydraulic pit props. RHEINSTAHL WANHEIM G.m.b.H. Nov. 27, 1964 [Nov. 29, 1963], No. 48314/64. Heading E1E. In a multi-stage hydraulic pit prop comprising sections 1, 2, 3 having a common working chamber and operative piston areas of approximately uniform size so that the prop has the same load bearing capacity over its centre extension, a support piston 14 is connected to the innermost section 3 to delineate the working chamber whereby the inner section 3 is extended before the intermediate section 2. The support piston is guided in a cylinder 16 having lugs 19 for engagement with a shoulder 10a on the piston 18 of the section 2. Pressure fluid is fed to the working chamber via passages 8, 20, 21, 22 and retraction is effected by air pressing and during the expansion stroke or fed through to conduits 7, 9, 9a, 23-the arrangement being such that the section 2 is retracted before the section 3.
GB48314/64A 1963-11-29 1964-11-27 Improvements in hydraulic pit props Expired GB1065559A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DER36680A DE1231194B (en) 1963-11-29 1963-11-29 Multi-stage hydraulic pit ram
DER41253A DE1237040B (en) 1963-11-29 1965-08-06 Multi-stage hydraulic pit ram

Publications (1)

Publication Number Publication Date
GB1065559A true GB1065559A (en) 1967-04-19

Family

ID=25991737

Family Applications (2)

Application Number Title Priority Date Filing Date
GB48314/64A Expired GB1065559A (en) 1963-11-29 1964-11-27 Improvements in hydraulic pit props
GB34098/66A Expired GB1126940A (en) 1963-11-29 1966-07-29 A multi-stage telescopic hydraulic pit prop

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB34098/66A Expired GB1126940A (en) 1963-11-29 1966-07-29 A multi-stage telescopic hydraulic pit prop

Country Status (6)

Country Link
US (2) US3241801A (en)
JP (1) JPS5117651B1 (en)
BE (1) BE655844A (en)
DE (1) DE1237040B (en)
GB (2) GB1065559A (en)
NL (1) NL6413598A (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226972B (en) * 1964-10-20 1966-10-20 Gewerk Eisenhuette Westfalia Hydraulic double telescopic ram
US3592108A (en) * 1969-02-07 1971-07-13 Borje Oscar Rosaen Fluid cylinder
GB1280899A (en) * 1969-06-21 1972-07-05 Gewerk Eisenhuette Westfalia Improvements in hydraulic props
PL80403B3 (en) * 1969-11-21 1975-08-30
US3858485A (en) * 1971-01-27 1975-01-07 Borje O Rosaen Fluid cylinder
JPS4863172A (en) * 1971-12-03 1973-09-03
JPS5512006Y2 (en) * 1972-03-02 1980-03-15
US3791628A (en) * 1972-07-26 1974-02-12 Ocean Science & Eng Motion compensated crown block system
FR2253160B1 (en) * 1973-12-03 1977-06-24 Poclain Sa
US4076465A (en) * 1974-01-18 1978-02-28 Pauliukonis Richard S Volumetric proportioning diluter
US3986438A (en) * 1975-09-08 1976-10-19 Deere & Company Hydraulic cylinder with integral feedback cylinder
DE2719848C2 (en) * 1977-05-04 1985-09-26 Montanhydraulik Gmbh & Co Kg, 4755 Holzwickede Multi-stage hydraulic telescopic cylinder
ZA804072B (en) * 1979-08-07 1981-06-24 Dobson Park Ind Telescoping jack
US4323427A (en) * 1979-09-10 1982-04-06 General Electric Company Deceleration buffer for hydraulic linear motion drive
DE2941168A1 (en) * 1979-10-11 1981-04-23 Thyssen Industrie Ag, 4300 Essen Mine hydraulic thrust piston gear - has differential piston ring chamber gas filled for even telescopic step force distribution
DE3213468A1 (en) * 1982-04-10 1983-10-13 Ecker Maschinenbau GmbH, 6680 Neunkirchen Hydraulic pit prop
DE3318641A1 (en) * 1982-12-22 1984-06-28 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen DEVICE FOR CONTROLLING THE SLIDING CAP CYLINDER HYDRAULIC SCREW REMOVAL UNITS
US4516468A (en) * 1983-01-10 1985-05-14 Hydraulic Technology Corporation Double acting telescopic cylinder construction
DE3420528A1 (en) * 1984-06-01 1985-12-05 Stabilus Gmbh, 5400 Koblenz CONTINUOUSLY ADJUSTABLE LIFTING DEVICE
DE3622424A1 (en) * 1986-07-03 1988-01-14 Montan Hydraulik Gmbh & Co Kg TWO-STAGE TELESCOPIC CYLINDER
US5953967A (en) * 1996-05-28 1999-09-21 Junkers; John Fluid-operated cylinder-piston unit, and a tool provided therewith
DE19647943C1 (en) * 1996-11-20 1998-06-18 Dbt Gmbh Hydraulic double telescopic stamp
GB2357806A (en) * 1999-12-02 2001-07-04 Trevor John Honour Load bearing props
CN102454658B (en) * 2010-10-25 2014-12-10 徐州重型机械有限公司 Jib system and telescopic oil cylinder thereof
CN107387491B (en) * 2016-05-16 2018-11-30 卡特彼勒（郑州）有限公司 Double-action hydraulic mechanism, multi-stage expansion hydraulic mechanism and hydraulic support
CN106969002A (en) * 2017-04-10 2017-07-21 湖北工业大学 Two-stage double-act-ing hydraulic J-Horner
CN111058882B (en) * 2019-12-12 2021-02-26 天地科技股份有限公司 Top beam of anti-impact advanced hydraulic support

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151057A (en) * 1936-10-07 1939-03-21 Suth Jack Well drilling machine
US2364741A (en) * 1942-11-26 1944-12-12 St Paul Hydraulic Hoist Compan Telescopic jack structure
US2517153A (en) * 1946-08-16 1950-08-01 Gar Wood Ind Inc Telescopic power down hoist
US2487920A (en) * 1948-05-25 1949-11-15 John A Celenza Hydraulic ram
US2933070A (en) * 1958-08-12 1960-04-19 Rheinstahl Siegener Eisenbahnb Double-acting hydraulic jack
GB905379A (en) * 1960-03-23 1962-09-05 Dowty Mining Equipment Ltd Improvements relating to hydraulic mine roof supporting devices
DE1153705B (en) * 1960-10-01 1963-09-05 Rheinstahl Gmbh Wanheim Hydraulic pit ram
DE1138007B (en) * 1960-12-16 1962-10-18 Bosch Gmbh Robert Multi-part pit stamp
US3190324A (en) * 1962-07-27 1965-06-22 Nordberg Manufacturing Co Fluid piston and cylinder assembly for use in railway tie cutters and the like
FR1343862A (en) * 1962-11-03 1963-11-22 Pusher-striker, prop, prop distributor and walk-behind support distribution system

Also Published As

Publication number Publication date
NL6413598A (en) 1965-05-31
US3241801A (en) 1966-03-22
JPS5117651B1 (en) 1976-06-03
GB1126940A (en) 1968-09-11
US3426649A (en) 1969-02-11
BE655844A (en) 1965-03-16
DE1237040B (en) 1967-03-23

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