GB8800443D0 - Fluid operated jacks - Google Patents

Fluid operated jacks

Info

Publication number
GB8800443D0
GB8800443D0 GB888800443A GB8800443A GB8800443D0 GB 8800443 D0 GB8800443 D0 GB 8800443D0 GB 888800443 A GB888800443 A GB 888800443A GB 8800443 A GB8800443 A GB 8800443A GB 8800443 D0 GB8800443 D0 GB 8800443D0
Authority
GB
United Kingdom
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
GB888800443A
Other versions
GB2214235B (en
GB2214235A (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.)
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
Priority to GB8800443A priority Critical patent/GB2214235B/en
Publication of GB8800443D0 publication Critical patent/GB8800443D0/en
Priority to AU27663/88A priority patent/AU621077B2/en
Publication of GB2214235A publication Critical patent/GB2214235A/en
Application granted granted Critical
Publication of GB2214235B publication Critical patent/GB2214235B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Actuator (AREA)
GB8800443A 1988-01-09 1988-01-09 Fluid operated jacks Expired - Fee Related GB2214235B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8800443A GB2214235B (en) 1988-01-09 1988-01-09 Fluid operated jacks
AU27663/88A AU621077B2 (en) 1988-01-09 1988-12-30 Fluid operated jacks

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
GB8800443D0 true GB8800443D0 (en) 1988-02-10
GB2214235A GB2214235A (en) 1989-08-31
GB2214235B GB2214235B (en) 1992-02-05

Family

ID=10629708

Family Applications (1)

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

Country Status (2)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPN687795A0 (en) * 1995-11-29 1995-12-21 Parker Hannifin (Australia) 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

Also Published As

Publication number Publication date
GB2214235B (en) 1992-02-05
AU621077B2 (en) 1992-03-05
GB2214235A (en) 1989-08-31
AU2766388A (en) 1989-07-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940109