CA932239A - Fluid-flow control means - Google Patents

Fluid-flow control means

Info

Publication number
CA932239A
CA932239A CA081281A CA81281A CA932239A CA 932239 A CA932239 A CA 932239A CA 081281 A CA081281 A CA 081281A CA 81281 A CA81281 A CA 81281A CA 932239 A CA932239 A CA 932239A
Authority
CA
Canada
Prior art keywords
fluid
control means
flow control
flow
control
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
CA081281A
Inventor
Cooke John
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
Priority claimed from GB5310669A external-priority patent/GB1261129A/en
Application filed by Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Application granted granted Critical
Publication of CA932239A publication Critical patent/CA932239A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E21D15/15—Means counteracting entry of dirt; Built-in cleaning devices
    • E21D15/155—Built-in cleaning 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
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/512—Arrangement of valves
    • 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
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E21D23/26—Hydraulic or pneumatic control
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
CA081281A 1969-05-13 1970-04-28 Fluid-flow control means Expired CA932239A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1924446 1969-05-13
GB5310669A GB1261129A (en) 1969-10-30 1969-10-30 Improvements in or relating to fluid-flow control means

Publications (1)

Publication Number Publication Date
CA932239A true CA932239A (en) 1973-08-21

Family

ID=25757392

Family Applications (1)

Application Number Title Priority Date Filing Date
CA081281A Expired CA932239A (en) 1969-05-13 1970-04-28 Fluid-flow control means

Country Status (4)

Country Link
AT (1) AT293981B (en)
CA (1) CA932239A (en)
FR (1) FR2047637A5 (en)
YU (1) YU33037B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2115526B (en) * 1982-02-24 1986-04-09 Teledyne Ind Multiposition selector valve

Also Published As

Publication number Publication date
YU33037B (en) 1976-03-31
YU118070A (en) 1975-08-31
FR2047637A5 (en) 1971-03-12
AT293981B (en) 1971-11-10

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