DE2941168A1 - Mine hydraulic thrust piston gear - has differential piston ring chamber gas filled for even telescopic step force distribution - Google Patents

Mine hydraulic thrust piston gear - has differential piston ring chamber gas filled for even telescopic step force distribution

Info

Publication number
DE2941168A1
DE2941168A1 DE19792941168 DE2941168A DE2941168A1 DE 2941168 A1 DE2941168 A1 DE 2941168A1 DE 19792941168 DE19792941168 DE 19792941168 DE 2941168 A DE2941168 A DE 2941168A DE 2941168 A1 DE2941168 A1 DE 2941168A1
Authority
DE
Germany
Prior art keywords
telescopic
force distribution
gas filled
chamber gas
ring chamber
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.)
Withdrawn
Application number
DE19792941168
Other languages
German (de)
Inventor
Peter Naundorf
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.)
ThyssenKrupp Technologies AG
Original Assignee
Thyssen Industrie 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 Thyssen Industrie AG filed Critical Thyssen Industrie AG
Priority to DE19792941168 priority Critical patent/DE2941168A1/en
Publication of DE2941168A1 publication Critical patent/DE2941168A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/08Advancing mechanisms
    • 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

Abstract

Two, or pref. more, tubular telescopic pieces, with equal pressure-active piston faces in individual steps, for overall even load absorption, are incorporated in an hydraulically activated multi-stage thrust piston gear assembly. This system is esp. used in mining. On the side of the differential piston (13) not under the influence of hydraulic fluid there is an annular compartment (29) filled with gas both on compression and on extension of the telescopic sections (1,2,3). On compression, these sections are drawn in with virtually equal force. There are no widely differing forces within individual steps during exploitation, and coupling points are protected.
DE19792941168 1979-10-11 1979-10-11 Mine hydraulic thrust piston gear - has differential piston ring chamber gas filled for even telescopic step force distribution Withdrawn DE2941168A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792941168 DE2941168A1 (en) 1979-10-11 1979-10-11 Mine hydraulic thrust piston gear - has differential piston ring chamber gas filled for even telescopic step force distribution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792941168 DE2941168A1 (en) 1979-10-11 1979-10-11 Mine hydraulic thrust piston gear - has differential piston ring chamber gas filled for even telescopic step force distribution

Publications (1)

Publication Number Publication Date
DE2941168A1 true DE2941168A1 (en) 1981-04-23

Family

ID=6083213

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792941168 Withdrawn DE2941168A1 (en) 1979-10-11 1979-10-11 Mine hydraulic thrust piston gear - has differential piston ring chamber gas filled for even telescopic step force distribution

Country Status (1)

Country Link
DE (1) DE2941168A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526091A1 (en) * 1982-04-28 1983-11-04 Gewerk Eisenhuette Westfalia Hydraulic ram for horizontal well or shaft sinking - using two telescopic pistons, and with mounting plates provided with universal joints
DE3325746C1 (en) * 1983-07-16 1985-04-11 Bochumer Eisenhuette Heintzmann Gmbh & Co Kg, 4630 Bochum, De Prop for support assemblies
EP0478841A1 (en) * 1990-10-05 1992-04-08 Walter Hunger Hydraulic telescopic actuator for a dump truck
CN103712744A (en) * 2014-01-10 2014-04-09 浙江大学 Positive step force testing system

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1778211U (en) * 1958-09-11 1958-11-27 Hemscheidt Maschf Hermann High pressure vordrueckzylinder.
DE1081397B (en) * 1956-06-25 1960-05-12 Becorit Grubenausbau Gmbh Hydraulic props
DE1138007B (en) * 1960-12-16 1962-10-18 Bosch Gmbh Robert Multipart props
DE1149678B (en) * 1960-09-15 1963-06-06 Rheinstahl Gmbh Wanheim Multi-stage hydraulic props
GB977800A (en) * 1962-08-21 1964-12-16 Electro Hydraulics Ltd Improvements in or relating to mine roof supports
DE1207317B (en) * 1962-02-03 1965-12-23 Bwg Bergwerk Walzwerk Hydraulic props with increased stroke
US3241801A (en) * 1963-11-29 1966-03-22 Rheinstahl Gmbh Wanheim Hydraulic prop
DE1433238A1 (en) * 1962-11-03 1969-11-20 Binaut Alain Georges Ernest Border longwall
DE1806508A1 (en) * 1968-11-02 1970-05-14 Wild A G & Co Ltd Three-piece hydraulic rams for the mine roof
DE2032455A1 (en) * 1970-07-01 1972-01-05

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1081397B (en) * 1956-06-25 1960-05-12 Becorit Grubenausbau Gmbh Hydraulic props
DE1778211U (en) * 1958-09-11 1958-11-27 Hemscheidt Maschf Hermann High pressure vordrueckzylinder.
DE1149678B (en) * 1960-09-15 1963-06-06 Rheinstahl Gmbh Wanheim Multi-stage hydraulic props
DE1138007B (en) * 1960-12-16 1962-10-18 Bosch Gmbh Robert Multipart props
DE1207317B (en) * 1962-02-03 1965-12-23 Bwg Bergwerk Walzwerk Hydraulic props with increased stroke
GB977800A (en) * 1962-08-21 1964-12-16 Electro Hydraulics Ltd Improvements in or relating to mine roof supports
DE1433238A1 (en) * 1962-11-03 1969-11-20 Binaut Alain Georges Ernest Border longwall
US3241801A (en) * 1963-11-29 1966-03-22 Rheinstahl Gmbh Wanheim Hydraulic prop
DE1237040B (en) * 1963-11-29 1967-03-23 Rheinstahl Gmbh Wanheim Multi-stage hydraulic props
US3426649A (en) * 1963-11-29 1969-02-11 Rheinstahl Wanheim Gmbh Multistage hydraulic mine prop
DE1806508A1 (en) * 1968-11-02 1970-05-14 Wild A G & Co Ltd Three-piece hydraulic rams for the mine roof
DE2032455A1 (en) * 1970-07-01 1972-01-05

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526091A1 (en) * 1982-04-28 1983-11-04 Gewerk Eisenhuette Westfalia Hydraulic ram for horizontal well or shaft sinking - using two telescopic pistons, and with mounting plates provided with universal joints
DE3325746C1 (en) * 1983-07-16 1985-04-11 Bochumer Eisenhuette Heintzmann Gmbh & Co Kg, 4630 Bochum, De Prop for support assemblies
EP0478841A1 (en) * 1990-10-05 1992-04-08 Walter Hunger Hydraulic telescopic actuator for a dump truck
CN103712744A (en) * 2014-01-10 2014-04-09 浙江大学 Positive step force testing system
CN103712744B (en) * 2014-01-10 2015-08-12 浙江大学 Positive step force pilot system

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee