AU6096080A - Telescoping mine roof support - Google Patents

Telescoping mine roof support

Info

Publication number
AU6096080A
AU6096080A AU60960/80A AU6096080A AU6096080A AU 6096080 A AU6096080 A AU 6096080A AU 60960/80 A AU60960/80 A AU 60960/80A AU 6096080 A AU6096080 A AU 6096080A AU 6096080 A AU6096080 A AU 6096080A
Authority
AU
Australia
Prior art keywords
roof support
mine roof
telescoping
telescoping mine
support
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
AU60960/80A
Other versions
AU534250B2 (en
Inventor
John Marsh
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.)
Joy Global Industries Ltd
Original Assignee
Dobson Park Industries 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
Application filed by Dobson Park Industries Ltd filed Critical Dobson Park Industries Ltd
Publication of AU6096080A publication Critical patent/AU6096080A/en
Application granted granted Critical
Publication of AU534250B2 publication Critical patent/AU534250B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
AU60960/80A 1979-08-07 1980-07-31 Telescoping mine roof support Ceased AU534250B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7927547 1979-08-07
GB7927547 1979-08-07

Publications (2)

Publication Number Publication Date
AU6096080A true AU6096080A (en) 1982-02-11
AU534250B2 AU534250B2 (en) 1984-01-12

Family

ID=10507057

Family Applications (1)

Application Number Title Priority Date Filing Date
AU60960/80A Ceased AU534250B2 (en) 1979-08-07 1980-07-31 Telescoping mine roof support

Country Status (6)

Country Link
AU (1) AU534250B2 (en)
DE (1) DE3029757A1 (en)
FR (1) FR2463306A1 (en)
IN (1) IN154411B (en)
MX (1) MX151616A (en)
ZA (1) ZA804072B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3728415A1 (en) * 1987-04-14 1988-11-03 Juergen Dipl Ing Schaefer Telescopic tube
CN109707678B (en) * 2018-12-28 2020-12-11 北京天地玛珂电液控制系统有限公司 Pressure cylinder, hydraulic impact testing system and method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE595295C (en) * 1927-11-02 1934-07-14 Armin Tenner Fa Hydraulic tilting device, especially for motor vehicles
DE963750C (en) * 1955-06-22 1957-05-09 Demag Ag Hydraulic cylinder with telescoping pistons
FR1365193A (en) * 1963-08-06 1964-06-26 Yale & Towne Mfg Co Telescopic lifting cylinder
BE655844A (en) * 1963-11-29 1965-03-16
DE1226972B (en) * 1964-10-20 1966-10-20 Gewerk Eisenhuette Westfalia Hydraulic double telescopic ram
CH501156A (en) * 1968-12-28 1970-12-31 Pesci Spa Carlo Method and device for controlling telescopic, hydraulic multi-piston working cylinders
US3610100A (en) * 1969-06-12 1971-10-05 Koehring Co Telescopic actuator
DE2253646C3 (en) * 1972-11-02 1980-08-21 Montan-Hydraulik Gmbh & Co Kg, 4755 Holzwickede Multi-stage hydraulic telescopic cylinder
DE2403852C3 (en) * 1974-01-28 1981-01-08 Gewerkschaft Eisenhuette Westfalia, 4670 Luenen Hydraulic telescopic ram for pit lining
DE2537715C3 (en) * 1975-08-23 1980-11-06 Saarbergwerke Ag, 6600 Saarbruecken Pressure reducing valve arrangement and design for the connection of the two pressure chambers of a two-stage telescopic pit ram

Also Published As

Publication number Publication date
DE3029757A1 (en) 1981-02-26
ZA804072B (en) 1981-06-24
FR2463306B1 (en) 1984-10-12
FR2463306A1 (en) 1981-02-20
AU534250B2 (en) 1984-01-12
IN154411B (en) 1984-10-27
MX151616A (en) 1985-01-14

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