GB535718A - Improvements in and relating to hydraulic mechanism - Google Patents

Improvements in and relating to hydraulic mechanism

Info

Publication number
GB535718A
GB535718A GB30180/39A GB3018039A GB535718A GB 535718 A GB535718 A GB 535718A GB 30180/39 A GB30180/39 A GB 30180/39A GB 3018039 A GB3018039 A GB 3018039A GB 535718 A GB535718 A GB 535718A
Authority
GB
United Kingdom
Prior art keywords
piston
oil
chamber
reservoir
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
GB30180/39A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB535718A publication Critical patent/GB535718A/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
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/072—Combined pneumatic-hydraulic systems
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/216—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being pneumatic-to-hydraulic converters
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41572—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and an output member
    • 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
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
    • F15B2211/8855—Compressible fluids, e.g. specific to pneumatics

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

535,718. Pneumatic single-stroke apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 16, 1939, No. 30180. Convention date, Nov. 18, 1938. [Class 8(ii)] [Also in Group XXIX] In apparatus comprising a piston operated through a body of liquid by compressed gas, liquid that leaks past the piston is trapped in a reservoir provided with a check-valve, and is periodically forced back into the liquid-chamber. The apparatus shown in the Figure comprises, as described in Specification 514,005, [Group XXXVII], a piston 10, an oil-chamber 20, and valves 14, 15, 22 operated by coils 11, 12. On energization of the coils, compressed air is admitted to the chamber, oil is forced out, and the piston is raised, coil 12 being then de-energized to re-close the valve 22 and thereby maintain the piston in raised position. On de-energization and re-energization of the coils 11, 12, compressed air is applied to the tops of the piston-chamber, and the piston is depressed. For trapping oil that leaks through the packing 28 into the space 29, the apparatus is now provided with a passage 30 leading through a ball-valve 31 to an inclined reservoir 32 which communicates through pipes 33, 34 with the chamber 20. When the trapped oil covers the end of the pipe 33, air bubbles through the oil and builds up pressure in the reservoir, and when pressure is released from the chamber 20 to depress the piston, oil is forced out of the reservoir and returned to the chamber. Oil sprayed off the ball-valve 31 during closing thereof passes through an opening 36, is caught by a filter 35, and flows back through the ball-valve to the reservoir. The minute quantity of oil that passes the filter, seeps through a threaded connection 38, and returns to the reservoir through a groove 39 and holes 40.
GB30180/39A 1938-11-18 1939-11-16 Improvements in and relating to hydraulic mechanism Expired GB535718A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US241204A US2208451A (en) 1938-11-18 1938-11-18 Hydraulic mechanism

Publications (1)

Publication Number Publication Date
GB535718A true GB535718A (en) 1941-04-18

Family

ID=22909694

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30180/39A Expired GB535718A (en) 1938-11-18 1939-11-16 Improvements in and relating to hydraulic mechanism

Country Status (2)

Country Link
US (1) US2208451A (en)
GB (1) GB535718A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2490823A (en) * 1946-10-14 1949-12-13 Howard H Manning Hydraulic-pneumatic system
US2528472A (en) * 1947-01-31 1950-10-31 American Steel Foundries Pneumatically actuated hydraulic circuit for presses
US2692581A (en) * 1948-09-11 1954-10-26 Askania Regulator Co Pneumatic safety device
DE19615475A1 (en) * 1996-04-19 1997-10-23 Knecht Filterwerke Gmbh Device for ventilation of a storage tank
NL2027335B1 (en) * 2021-01-18 2022-07-25 Asco Controls Bv Air/gas exhaust port protector configured for connection to an exhaust port of a device with a sleeve-shaped filter locked up between a ledge and a flow guider portion.

Also Published As

Publication number Publication date
US2208451A (en) 1940-07-16

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