GB1233188A - - Google Patents

Info

Publication number
GB1233188A
GB1233188A GB1395068A GB1233188DA GB1233188A GB 1233188 A GB1233188 A GB 1233188A GB 1395068 A GB1395068 A GB 1395068A GB 1233188D A GB1233188D A GB 1233188DA GB 1233188 A GB1233188 A GB 1233188A
Authority
GB
United Kingdom
Prior art keywords
ram
roof support
exhaust line
valve
connect
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
GB1395068A
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 filed Critical
Publication of GB1233188A publication Critical patent/GB1233188A/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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3052—Shuttle valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30585—Assemblies of multiple valves having a single valve for multiple output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders

Abstract

1,233,188. Hydraulic mine roof support. GULLICK DOBSON Ltd. 21 Feb., 1969 [22 March, 1968], No. 13950/68. Heading E1P. When ram 11 and hydraulic roof support 10 are retracted simultaneously to move the roof support nearer to the working face shuttle valve 20 is closed and fluid from the ram passes to the exhaust line 14, similarly fluid from the roof support 10 passes through control valve 15 to exhaust line 13, neither exhaust streams affecting the working of the other device. Control valve 15 is used to connect supply 12 to prop 10 and to connect supply 12 to side 11b of ram 11 when shuttle valve 20 is open or to connect the supply to side 11a of ram 11 when shuttle valve 20 is closed. If back pressure is low then only one exhaust line may be used. A non return valve 21 may be provided on the exhaust line from ram 11.
GB1395068A 1968-03-22 1968-03-22 Expired GB1233188A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1395068 1968-03-22

Publications (1)

Publication Number Publication Date
GB1233188A true GB1233188A (en) 1971-05-26

Family

ID=10032312

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1395068A Expired GB1233188A (en) 1968-03-22 1968-03-22

Country Status (2)

Country Link
US (1) US3564974A (en)
GB (1) GB1233188A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2623031C2 (en) * 1976-05-22 1978-07-06 Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal Arrangement of a push-button control device for hydraulic support
GB2153971B (en) * 1984-02-08 1988-01-13 Dobson Park Ind Valve assembly
JPS61112164U (en) * 1984-12-27 1986-07-16

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1824062A (en) * 1928-03-30 1931-09-22 Westinghouse Air Brake Co Fluid pressure brake for airplanes
US2416373A (en) * 1943-02-01 1947-02-25 Deere & Co Joint or separate operation of control valves for two fluid motors
US3039266A (en) * 1960-12-08 1962-06-19 Clark Equipment Co Flow divider system

Also Published As

Publication number Publication date
DE1910505B2 (en) 1972-10-19
DE1910505A1 (en) 1969-10-09
US3564974A (en) 1971-02-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee