GB737678A - Improvements in or relating to hydraulic control valve apparatus - Google Patents

Improvements in or relating to hydraulic control valve apparatus

Info

Publication number
GB737678A
GB737678A GB2927152A GB2927152A GB737678A GB 737678 A GB737678 A GB 737678A GB 2927152 A GB2927152 A GB 2927152A GB 2927152 A GB2927152 A GB 2927152A GB 737678 A GB737678 A GB 737678A
Authority
GB
United Kingdom
Prior art keywords
valve
passages
pressure
exhaust
motor
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
GB2927152A
Inventor
Francis Benjamin Levetus
George Edward Chittenden
Norman Lee
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.)
Keelavite Co Ltd
Original Assignee
Keelavite 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 Keelavite Co Ltd filed Critical Keelavite Co Ltd
Priority to GB2927152A priority Critical patent/GB737678A/en
Publication of GB737678A publication Critical patent/GB737678A/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
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool 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
    • 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
    • F15B13/0426—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 fluid-operated pilot valves, i.e. multiple stage valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4035—Control of circuit flow

Abstract

737,678. Fluid-pressure servomotor-control systems. KEELAVITE CO., Ltd. Nov. 9, 1953 [Nov. 19, 1952; June 22, 1953], Nos. 29271/52 and 17277/53. Class 135. A hydraulic servomotor-control system comprises a main piston valve member A slidable in a casing B to control an inlet port B<SP>1</SP>, exhaust ports B<SP>2</SP>, and motor ports B<SP>3</SP>, B<SP>4</SP> and having recesses D<SP>1</SP> at its ends co-operable with pressure balancing valves F controlling the flow of pressure liquid from inlet passages E to outlet passages E<SP>1</SP>, E<SP>2</SP> leading to an exhaust port G<SP>4</SP> through a subsidiary valve H. The valve H comprises a plunger H<SP>1</SP> resiliently held between bellows H<SP>3</SP>, H<SP>7</SP> and operable by a lever H<SP>4</SP>. A continuously rotating valve J having an opening J<SP>1</SP> to exhaust is disposed between the passages E<SP>1</SP>, E<SP>2</SP> so that the pressure in these passages and chambers B<SP>5</SP>, B<SP>6</SP> in the casing B is continuously changing to maintain the valve A in a state of vibration to improve its sensitivity. On movement, e.g. of the valve H to the left, the effective areas of the passages E<SP>1</SP>, E<SP>2</SP> are increased and decreased respectively so that pressure in the chamber B<SP>6</SP> builds up to move the valve A rightwardly to supply pressure liquid to the right-hand end of the motor C and exhaust it from its left-hand end. During the right-ward movement of the valve A the lefthand valve F reduces the opening to the chamber B<SP>6</SP> and the right-hand valve F increases the opening to the chamber B<SP>5</SP> to restore the pressure balance acting on the valve A. In a practical example, the pressure liquid passing through the balancing valves F and the subsidiary valve H is derived from the same source as that supplied to the motor C in which case axial and radial passages in the valve member A connect the inlet port B<SP>1</SP> with the recesses D<SP>1</SP>. The valve J is continuously rotated by a hydraulic gear motor which motor also rotates the valve H to improve the sensitivity of the apparatus, and an adjustable needle valve is located in the exhaust outlet G<SP>4</SP> to control the sensitivity of the valve member A. In a modification, pressure liquid enters the port G4, passes into the pressure balancing chambers B<SP>5</SP>, B<SP>6</SP> through the passages E<SP>1</SP>, E<SP>2</SP> and out therefrom through the passages E, in which case the valves F are tapered to open instead of close on movement of the valve A away from the adjacent end of the casing B.
GB2927152A 1952-11-19 1952-11-19 Improvements in or relating to hydraulic control valve apparatus Expired GB737678A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2927152A GB737678A (en) 1952-11-19 1952-11-19 Improvements in or relating to hydraulic control valve apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2927152A GB737678A (en) 1952-11-19 1952-11-19 Improvements in or relating to hydraulic control valve apparatus

Publications (1)

Publication Number Publication Date
GB737678A true GB737678A (en) 1955-09-28

Family

ID=10288881

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2927152A Expired GB737678A (en) 1952-11-19 1952-11-19 Improvements in or relating to hydraulic control valve apparatus

Country Status (1)

Country Link
GB (1) GB737678A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507298A (en) * 1968-04-25 1970-04-21 Clark Equipment Co Dual relief and pressure regulating valve assembly
GB2163875A (en) * 1984-08-28 1986-03-05 Commercial Shearing Positioning of hydraulic elements
EP2050934A1 (en) * 2007-10-19 2009-04-22 Delphi Technologies, Inc. Oil flow control valve for a cam phaser
GB2505168A (en) * 2012-08-01 2014-02-26 Bifold Fluidpower Ltd A fluid flow control device for a double-acting piston actuator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507298A (en) * 1968-04-25 1970-04-21 Clark Equipment Co Dual relief and pressure regulating valve assembly
GB2163875A (en) * 1984-08-28 1986-03-05 Commercial Shearing Positioning of hydraulic elements
EP2050934A1 (en) * 2007-10-19 2009-04-22 Delphi Technologies, Inc. Oil flow control valve for a cam phaser
GB2505168A (en) * 2012-08-01 2014-02-26 Bifold Fluidpower Ltd A fluid flow control device for a double-acting piston actuator
GB2505168B (en) * 2012-08-01 2018-11-28 Bifold Fluidpower Ltd A fluid flow control device

Similar Documents

Publication Publication Date Title
GB1510064A (en) Priority flow valve
GB737678A (en) Improvements in or relating to hydraulic control valve apparatus
GB878576A (en) Two-stage valve for controlling fluid flow
GB1480059A (en) Cylinder and piston valve
GB1358153A (en) Multi-way rotary valve for a pressure medium
US1777060A (en) Valve
US1361581A (en) Valve
SE7614481L (en) CONTROL VALVE
GB721528A (en) Improvements in or relating to combined pressure fluid distributor and pressure regulating valve devices
US2579711A (en) Double-acting proportional hydraulic pressure power amplifier
GB1066590A (en) Rapid response hydraulic system
GB539068A (en) Improvements in or relating to fluid-operated servomotors
GB945265A (en) Mechanical seal with controlled leakage
US2392889A (en) Motion reproducing mechanism
US3106165A (en) Liquid pressure supply system
US2621674A (en) Outflow regulator
US2621630A (en) Fluid-operated means for regulating the supply of liquid fuel from a pump to a prime mover
US3406516A (en) Speed control devices for gas turbine engines
GB1056487A (en) Improvements in or relating to piston valves
GB835814A (en) Hydraulic control valve apparatus
GB609512A (en) Improvements in or relating to control valves for hydraulic transmission systems
US3161025A (en) Pneumatic devices having cascaded sets
GB1446877A (en) Control arrangement for controlling a gas turbine engine
GB731332A (en) Fluid flow control valves
GB608860A (en) Improvements in fuel supply systems