GB1153881A - Improvements in or relating to Hydraulic Pressure Testing Devices - Google Patents

Improvements in or relating to Hydraulic Pressure Testing Devices

Info

Publication number
GB1153881A
GB1153881A GB3682765A GB3682765A GB1153881A GB 1153881 A GB1153881 A GB 1153881A GB 3682765 A GB3682765 A GB 3682765A GB 3682765 A GB3682765 A GB 3682765A GB 1153881 A GB1153881 A GB 1153881A
Authority
GB
United Kingdom
Prior art keywords
flow
aug
piston
valve
way valve
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
GB3682765A
Inventor
Frank Marshall
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.)
FRANK MARSHALL ENGINEERS Ltd
Original Assignee
FRANK MARSHALL ENGINEERS 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 FRANK MARSHALL ENGINEERS Ltd filed Critical FRANK MARSHALL ENGINEERS Ltd
Publication of GB1153881A publication Critical patent/GB1153881A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves

Abstract

1,153,881. Hydraulic apparatus. FRANK MARSHALL (ENDS. ) Ltd. Aug. 11, 1966 [Aug. 13, 1965; Aug. 27, 1965] , Nos.34668/65 and 36827/65. Heading F1P. [Also in Division F2] Hydraulic pressure testing apparatus comprises a differential piston (1 Fig. 1 not shown) which is reciprocated by a four-way valve (5) to provide a high-pressure in line (19) connected to the apparatus to be tested, or to reset the piston, such apparatus being described in Specification 1, 098, 499. The flow to the larger side of the piston is controlled by a valve having an inlet 36 Fig. 2, connected to the four-way valve and an outlet 45 connected to the cylinder. A needle valve 44 regulates the flow to the cylinder in co-operation with a spring-loaded seat 41. When the four-way valve connects the larger side area to exhaust, the seat member is moved by the fluid-pressure to allow unrestricted flow. In a modification, the seating is fixed and a separate non-return valve controls the exhaust flow.
GB3682765A 1965-08-13 1965-08-13 Improvements in or relating to Hydraulic Pressure Testing Devices Expired GB1153881A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3466865 1965-08-13

Publications (1)

Publication Number Publication Date
GB1153881A true GB1153881A (en) 1969-05-29

Family

ID=10368490

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3682765A Expired GB1153881A (en) 1965-08-13 1965-08-13 Improvements in or relating to Hydraulic Pressure Testing Devices

Country Status (1)

Country Link
GB (1) GB1153881A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4725225U (en) * 1971-04-05 1972-11-21
US4766765A (en) * 1986-11-13 1988-08-30 Westinghouse Electric Corp. Multiphase valve testing
US4854165A (en) * 1987-06-01 1989-08-08 Danford A. Jay Apparatus for testing electrical components

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4725225U (en) * 1971-04-05 1972-11-21
US4766765A (en) * 1986-11-13 1988-08-30 Westinghouse Electric Corp. Multiphase valve testing
US4854165A (en) * 1987-06-01 1989-08-08 Danford A. Jay Apparatus for testing electrical components

Similar Documents

Publication Publication Date Title
GB1126873A (en) Improvements in hydraulic supply and control systems
GB1347358A (en) Damper device for railway vehicle automatic couplings
GB1293039A (en) Further improvements relating to a valve device including a spring-loaded check valve
GB1132929A (en) Improvements in or relating to relief valves
GB1153881A (en) Improvements in or relating to Hydraulic Pressure Testing Devices
ES432815A1 (en) Device at hydraulic motor
GB1115725A (en) Hydraulic cushion for dies
GB926180A (en) Improvements in pressure relief valves, more particularly for hydraulic operating circuits
GB535369A (en) Improvements in valves for use in hydraulic mechanisms
GB1072141A (en) Improvements in or relating to spool valves and slide valves
GB563672A (en) Improvements in and relating to relief valves
GB1216837A (en) Liquid fuel injection pumps
GB1163312A (en) Pressure Fluid Cylinders
FR2261434A1 (en) Semi-automatic ram supply system - has pressure-sensitive components controlling supply and return openings
GB970307A (en) Improvements in or relating to shuttle valves
GB1078377A (en) Non-return valves
GB1192074A (en) Improvements in and relating to Floor Door Springs
GB1155146A (en) Valves For Fluids
GB1475283A (en) Liquid fuel injection pumping apparatus
GB1176590A (en) Improvements in or relating to Cushion Relief Valves
GB710569A (en) A hydraulic valve assembly
GB1414744A (en) Valve arrangement
GB586383A (en) Improvements in or relating to manually-operated liquid-delivery valves
ES173941U (en) Rapid plug for hydraulic conductions at high pressure. (Machine-translation by Google Translate, not legally binding)
GB758375A (en) Improvements in non-return valves