GB1032021A - Advanceable roof support assembly - Google Patents

Advanceable roof support assembly

Info

Publication number
GB1032021A
GB1032021A GB1659/64A GB165964A GB1032021A GB 1032021 A GB1032021 A GB 1032021A GB 1659/64 A GB1659/64 A GB 1659/64A GB 165964 A GB165964 A GB 165964A GB 1032021 A GB1032021 A GB 1032021A
Authority
GB
United Kingdom
Prior art keywords
line
valve
plunger
source
jan
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
GB1659/64A
Inventor
Douglas Herbert Hewlett Bolton
Michael Charles Potts
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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment 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 Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Priority to GB1659/64A priority Critical patent/GB1032021A/en
Priority to US424306A priority patent/US3301136A/en
Priority to FR1638A priority patent/FR1420281A/en
Priority to DED46224A priority patent/DE1279582B/en
Publication of GB1032021A publication Critical patent/GB1032021A/en
Expired 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
    • 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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

Abstract

1,032,021. Valves. DOWTY MINING EQUIPMENT Ltd. Jan. 5, 1965 [Jan. 14, 1964], No. 1659/64. Heading F2V. [Also in Division F1] A valve, Fig. 4 (not shown), connected in a line 17 is operable to connect the supply of pressure fluid from a source 18 to either the right or left-hand portions of the line 17 and is arranged to isolate the line 17 from the source 18 in the event of a predetermined fall in pressure in the portion of the line pressurized. The valve comprises a housing 65 having movable therein two valve members 66, 67 urged by springs 68, 69 against valve seats 71, 72 to isolate the source 18 from the portions of the line 17. Each valve member 66, 67 is movable away from its seat by respective plungers 77, 78 controlled by a manually operated pivoted lever 79. In the inoperative position internal passages 81, 83 in the plungers connect the line 17 to a return line 19. When the plunger 77 is moved, the resulting pressurization of the lefthand portion of the line 17 also pressurizes a line 87 to move a piston 92 to the right against the action of a spring 93, whereby a plunger 89 slidable in the piston 92 can be manually caused to engage a recess 91 in the lever 79 in order to latch the valve in the operated position. If a fall in pressure occurs the spring 93 causes the plunger to unlatch and the valve returns to the original position. The pressurization of the line 17 may be arranged to cause operation of valves controlling the automatic advance of a mine roof support (see Division F1). Reference has been directed by the Comptroller to Specification 990,837.
GB1659/64A 1964-01-14 1964-01-14 Advanceable roof support assembly Expired GB1032021A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB1659/64A GB1032021A (en) 1964-01-14 1964-01-14 Advanceable roof support assembly
US424306A US3301136A (en) 1964-01-14 1965-01-08 Advanceable roof support assemblies
FR1638A FR1420281A (en) 1964-01-14 1965-01-12 Mobile set of support devices in mines, and valve for controlling the movement of these devices
DED46224A DE1279582B (en) 1964-01-14 1965-01-12 Wandering longwall mining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1659/64A GB1032021A (en) 1964-01-14 1964-01-14 Advanceable roof support assembly

Publications (1)

Publication Number Publication Date
GB1032021A true GB1032021A (en) 1966-06-08

Family

ID=9725813

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1659/64A Expired GB1032021A (en) 1964-01-14 1964-01-14 Advanceable roof support assembly

Country Status (4)

Country Link
US (1) US3301136A (en)
DE (1) DE1279582B (en)
FR (1) FR1420281A (en)
GB (1) GB1032021A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2700829A1 (en) * 1977-01-11 1978-07-20 Gewerk Eisenhuette Westfalia HYDRAULIC EXTENSION CONTROL

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6600072A (en) * 1966-01-04 1967-07-05
US3672257A (en) * 1969-03-17 1972-06-27 Tadano Tekkosho Kk Extension means of a multi-stage boom
DE2038663C3 (en) * 1970-08-04 1984-05-03 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Hydraulic control device for relocatable expansion units in the form of frames, trestles and the like.
US3709100A (en) * 1971-06-11 1973-01-09 Caterpillar Tractor Co Hydraulic implement control circuit
GB1571503A (en) * 1976-01-24 1980-07-16 Dowty Mining Equipment Ltd Longwall mining apparatus
DE2830510C3 (en) * 1978-07-12 1981-07-23 Bergwerksverband Gmbh, 4300 Essen Method and valve arrangement for setting the stamps of a walking support
IT1144292B (en) * 1981-07-09 1986-10-29 Fiat Allis Macch Movi MANUALLY OPERATED HYDRAULIC DEVICE FOR THE CONTROL OF A HYDRAULIC DISTRIBUTOR
GB2116618B (en) * 1982-03-06 1985-11-20 Dowty Mining Equipment Ltd Mine roof supports
US4530376A (en) * 1983-09-19 1985-07-23 Dresser Industries, Inc. Pilot valve including a hydraulically actuated detent

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2322611A (en) * 1940-04-27 1943-06-22 Bruno E Winkler Welding gun
US2689585A (en) * 1952-06-23 1954-09-21 Bendix Aviat Corp Self-holding valve
DE1131626B (en) * 1958-04-14 1962-06-20 Kloeckner Werke Ag Method and device for controlling the robbery and setting process of hydraulic longwall construction frames
FR1271386A (en) * 1959-10-12 1961-09-08 Coal Industry Patents Ltd Roof supports for mining galleries
US3115067A (en) * 1961-09-11 1963-12-24 Kelsey Hayes Co Power brake for motor vehicles
GB1046269A (en) * 1963-09-03 1966-10-19 Dowty Mining Equipment Ltd Advanceable roof support assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2700829A1 (en) * 1977-01-11 1978-07-20 Gewerk Eisenhuette Westfalia HYDRAULIC EXTENSION CONTROL

Also Published As

Publication number Publication date
DE1279582B (en) 1968-10-10
FR1420281A (en) 1965-12-03
US3301136A (en) 1967-01-31

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