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AU2766388A - Fluid operated jacks - Google Patents

Fluid operated jacks

Info

Publication number
AU2766388A
AU2766388A AU27663/88A AU2766388A AU2766388A AU 2766388 A AU2766388 A AU 2766388A AU 27663/88 A AU27663/88 A AU 27663/88A AU 2766388 A AU2766388 A AU 2766388A AU 2766388 A AU2766388 A AU 2766388A
Authority
AU
Australia
Prior art keywords
fluid operated
operated jacks
jacks
fluid
operated
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
AU27663/88A
Other versions
AU621077B2 (en
Inventor
Derek Alker
Reginald Andrew Phillips
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.)
Gullick Dobson Ltd
Original Assignee
Gullick Dobson 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 Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Publication of AU2766388A publication Critical patent/AU2766388A/en
Application granted granted Critical
Publication of AU621077B2 publication Critical patent/AU621077B2/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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
    • 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
    • E21D23/08—Advancing mechanisms

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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
AU27663/88A 1988-01-09 1988-12-30 Fluid operated jacks Ceased AU621077B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8800443A GB2214235B (en) 1988-01-09 1988-01-09 Fluid operated jacks
GB8800443 1988-01-09

Publications (2)

Publication Number Publication Date
AU2766388A true AU2766388A (en) 1989-07-13
AU621077B2 AU621077B2 (en) 1992-03-05

Family

ID=10629708

Family Applications (1)

Application Number Title Priority Date Filing Date
AU27663/88A Ceased AU621077B2 (en) 1988-01-09 1988-12-30 Fluid operated jacks

Country Status (2)

Country Link
AU (1) AU621077B2 (en)
GB (1) GB2214235B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5778753A (en) * 1995-11-29 1998-07-14 Parker Hannifin Pty Limited Pneumatic or hydraulic cylinders

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB991009A (en) * 1962-06-07 1965-05-05 Dowty Mining Equipment Ltd Mining apparatus
GB1369673A (en) * 1972-02-07 1974-10-09 Dowty Mining Equipment Ltd Fluid-operated jack with position signalling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5778753A (en) * 1995-11-29 1998-07-14 Parker Hannifin Pty Limited Pneumatic or hydraulic cylinders

Also Published As

Publication number Publication date
GB2214235B (en) 1992-02-05
AU621077B2 (en) 1992-03-05
GB8800443D0 (en) 1988-02-10
GB2214235A (en) 1989-08-31

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