US2916019A - Cushioned valves - Google Patents

Cushioned valves Download PDF

Info

Publication number
US2916019A
US2916019A US531491A US53149155A US2916019A US 2916019 A US2916019 A US 2916019A US 531491 A US531491 A US 531491A US 53149155 A US53149155 A US 53149155A US 2916019 A US2916019 A US 2916019A
Authority
US
United States
Prior art keywords
plunger
valves
cushioned
hydraulic
sleeves
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 - Lifetime
Application number
US531491A
Inventor
Edward C Murphy
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US531491A priority Critical patent/US2916019A/en
Application granted granted Critical
Publication of US2916019A publication Critical patent/US2916019A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F15B13/0407—Means for damping the valve member movement
    • 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
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86622—Motor-operated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86879—Reciprocating valve unit

Definitions

  • This invention relates to cushioned valves, and more particularly to cushioned hydraulic valves.
  • An object of the invention is to provide new and improved cushioned valves.
  • Another object of the invention is to provide new and improved cushioned hydraulic valves.
  • Another object of the invention is to provide hydraulic valves having sleeve inserts for cushioning plungers thereof.
  • a further object of the invention is to provide hydraulic valves of a type having plungers movable by high actuating forces during shifting movement thereof and provided with internal dashpot sleeves into which portions of the plunger move to dam-p movement thereof.
  • a cushioned valve illustrating certain features thereof may include a ported valve housing and a plunger movable therein to change the condition of the valve.
  • a cup located in the housing at one end of ⁇ the path is entered by a portion of the plunger having a slight clearance relative thereto to provide a dashpot effect with that portion of the plunger, thereby preventing pounding by the plunger as it reaches the end of its travel.
  • a cushioned hydraulic valve of the four-way type having a cylindrical housing or body having a centrally located inlet port 11 leading from a source of hydraulic liquid under pressure and which may be selectively connected by a plunger 12 to an outlet port 13 and an outlet port 14.
  • Exhaust ports 15 and 16 at the ends of a bore 17 in the housing lead to a common exhaust passage 18 leading to a supply tank (not shown), or the like, for the pressure source and under much lower pressure than the pressure on the liquid supplied to the supply port 11.
  • Flanged guide bushings 21 and 22 are bolted to the ends of the housing 10 and have seals 23 and 24 of well known types.
  • the bushings guide a pair of rod portions 25 of the plunger 12, and have cups or sleeves 27 and 28 projecting from the ends thereof.
  • the sleeves are provided with counterbores 31 and 32, which t with a slight clearance of a few thousandths of an inch around collar portions 33 and 34 of the plunger 12. This clearance is sufficiently great that oil or hydraulic liquid ows into the counterbores 31 and 32 under normal exhaust presv 2,916,019 PlatentedvsDec.
  • the sleeves 27 and 28 are so positioned that the collar portions 33, 34 enter the sleeves a substantial distance before one of the ports 13 and 14 is opened to the high pressure supply port 11 so that hydraulic shock is eliminated.
  • the damping action of the sleeves 27 and 28 is such that whenever one of the ports 13 and 14 is opened to the port 11 by movement of a piston 45 or a piston 46 of the plunger 12, the opening between the ports 11 and 13 or 14 is made sufficiently slow so as to avoid hydraulic shock to the equipment and lines connected to the housing 10. That is, the pressure of liquid in the ports 13 and 14 is prevented from changing abruptly by means of the damping action of the sleeves 27 and 28 and the collar portions 33 and 34.
  • the damping force is increased as either collar portion moves farther into its sleeve due to the lengthened escape path from the counterbore 31 or 32. This prevents shock between the collar portion and the sleeve 27 or 28 as the plunger 12 reaches the end of its movement, a-t which time the pull of the solenoid winding 41 or 42 is high on core portion 51 or 52.
  • This damping toward the end of the movement can be increased by tapering either the collars or the counterbores in such a way as to reduce the clearance between the collars. and the counterbores as the plunger approaches the end of its movement.
  • Opposed springs 53 and 54 are enclosed in tubular sleeves or housings 55 and 56, and hold the plunger 12 in neutral position when neither of Ithe windings 41 and 42 is energized.
  • valve eliminates hydraulic shocks and mechanical shocks from changing its condition. Its construction is simple and durable and is inexpensive both in original and maintenance costs.
  • a hydraulic valve which comprises a body member having a cylindrical chamber formed therein, said body member having a pair of sp-aced outlet ports and an interposed inlet port communicating with said chamber, a plunger mounted in said chamber, a pair of spaced pistons on said plunger adapted to cover both said outlet ports, said plunger extending beyond said pistons to provide a pair of collars, said collars having rod-like projections slidably mounted in opposite extremities of said body member, said inlet port being supplied with uid under pressure to fill said cylinder and position said pistons to cover said outlet ports, a pair of cup-like members extending from opposite extremities of said chamber into juxtaposition with the ends of said collars, said cup-likev members being provided with bores tapering in diameter in directions away from the ends of said collars, said collars having diameters slightly less than the minimum diameters of the bores, said members having an exhaust passage filled with lluid communicating with the chamber at the extending portion of said cup-like members for recontinual-'1y

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Magnetically Actuated Valves (AREA)

Description

Dec. 8, 1959 E. c. MURPHY 2,916,019
CUSHIONED VALVES Filed Aug. 3Q. 1955 United AStates Patent cUsHIoNED vALvEs Edward C. Murphy, Indianapolis, Ind., assignor to Western Electric Company, Incorporated, New York, N.Y., a corporation of New York Application August 30, 1955, Serial No. 531,491
1 Claim. (Cl. 121-465) This invention relates to cushioned valves, and more particularly to cushioned hydraulic valves.
In the use of valves of a type having piston-type plungers with high pressure hydraulic liquids, as the plunger is shifted to the position toward which it is being moved, sometimes both hydraulic and mechanical shocks occur. Breakage and high maintenance costs result from such pounding. Hitherto, there has been no simple, effective dashpot structure for eliminating such shocks.
An object of the invention is to provide new and improved cushioned valves.
Another object of the invention is to provide new and improved cushioned hydraulic valves.
Another object of the invention is to provide hydraulic valves having sleeve inserts for cushioning plungers thereof.
, A further object of the invention is to provide hydraulic valves of a type having plungers movable by high actuating forces during shifting movement thereof and provided with internal dashpot sleeves into which portions of the plunger move to dam-p movement thereof.
A cushioned valve illustrating certain features thereof may include a ported valve housing and a plunger movable therein to change the condition of the valve. A cup located in the housing at one end of `the path is entered by a portion of the plunger having a slight clearance relative thereto to provide a dashpot effect with that portion of the plunger, thereby preventing pounding by the plunger as it reaches the end of its travel.
A complete understanding of the invention may be obtained from the following detailed description of a valve forming a specific embodiment thereof, when read in conjunction with the appended drawing, in which the.
single figure is a longitudinal section of a valve forming one embodiment of the invention. 4
Referring now in detail to the drawing, there is shown therein a cushioned hydraulic valve of the four-way type having a cylindrical housing or body having a centrally located inlet port 11 leading from a source of hydraulic liquid under pressure and which may be selectively connected by a plunger 12 to an outlet port 13 and an outlet port 14. Exhaust ports 15 and 16 at the ends of a bore 17 in the housing lead to a common exhaust passage 18 leading to a supply tank (not shown), or the like, for the pressure source and under much lower pressure than the pressure on the liquid supplied to the supply port 11.
Flanged guide bushings 21 and 22 are bolted to the ends of the housing 10 and have seals 23 and 24 of well known types. The bushings guide a pair of rod portions 25 of the plunger 12, and have cups or sleeves 27 and 28 projecting from the ends thereof. The sleeves are provided with counterbores 31 and 32, which t with a slight clearance of a few thousandths of an inch around collar portions 33 and 34 of the plunger 12. This clearance is sufficiently great that oil or hydraulic liquid ows into the counterbores 31 and 32 under normal exhaust presv 2,916,019 PlatentedvsDec. v 8, 1959 ice sures to keep these counterbores lled with liquid and are suticiently` small that when the plunger 12 is shifted so that lone ofthe collar portions is moved farther into the sleeve 27 or 28 by a solenoid winding 41 or a solenoid winding 42, the oil is permitted to escape only slowly so that the movement of the plunger 12 is damped. A clearance found to be very satisfactory when used with conventional hydraulic uid used in injection molding presses is in the order of 0.0025 of an inch, the collar portions having a diameter in the order of one inch in this instance.
It should be noted that the sleeves 27 and 28 are so positioned that the collar portions 33, 34 enter the sleeves a substantial distance before one of the ports 13 and 14 is opened to the high pressure supply port 11 so that hydraulic shock is eliminated. The damping action of the sleeves 27 and 28 is such that whenever one of the ports 13 and 14 is opened to the port 11 by movement of a piston 45 or a piston 46 of the plunger 12, the opening between the ports 11 and 13 or 14 is made sufficiently slow so as to avoid hydraulic shock to the equipment and lines connected to the housing 10. That is, the pressure of liquid in the ports 13 and 14 is prevented from changing abruptly by means of the damping action of the sleeves 27 and 28 and the collar portions 33 and 34. Also, the damping force is increased as either collar portion moves farther into its sleeve due to the lengthened escape path from the counterbore 31 or 32. This prevents shock between the collar portion and the sleeve 27 or 28 as the plunger 12 reaches the end of its movement, a-t which time the pull of the solenoid winding 41 or 42 is high on core portion 51 or 52. This damping toward the end of the movement can be increased by tapering either the collars or the counterbores in such a way as to reduce the clearance between the collars. and the counterbores as the plunger approaches the end of its movement.
Opposed springs 53 and 54 are enclosed in tubular sleeves or housings 55 and 56, and hold the plunger 12 in neutral position when neither of Ithe windings 41 and 42 is energized.
The above-described valve eliminates hydraulic shocks and mechanical shocks from changing its condition. Its construction is simple and durable and is inexpensive both in original and maintenance costs.
It is to be understood that the above-described arrangements are simply illustrative of the application of the principles of the invention. Numerous other arrangements may be readily devised by those skilled in the art which will embody the principles of the invention and fall within the spirit and scope thereof.
What is claimed is:
A hydraulic valve, which comprises a body member having a cylindrical chamber formed therein, said body member having a pair of sp-aced outlet ports and an interposed inlet port communicating with said chamber, a plunger mounted in said chamber, a pair of spaced pistons on said plunger adapted to cover both said outlet ports, said plunger extending beyond said pistons to provide a pair of collars, said collars having rod-like projections slidably mounted in opposite extremities of said body member, said inlet port being supplied with uid under pressure to fill said cylinder and position said pistons to cover said outlet ports, a pair of cup-like members extending from opposite extremities of said chamber into juxtaposition with the ends of said collars, said cup-likev members being provided with bores tapering in diameter in directions away from the ends of said collars, said collars having diameters slightly less than the minimum diameters of the bores, said members having an exhaust passage filled with lluid communicating with the chamber at the extending portion of said cup-like members for recontinual-'1y increasing force opppsingrmoyement Qfsaid 5 piston corllarvin proportion to the `tapering diameter of said eup-like member. l:
References Cited i'n the leof this patent UNITED STATES PATENTS Garrison Sept. 26, 1882 Jordan Apr. 9, 1929 Foster Feb. 7, 1939 Emst 'f..' 111116 17,
v www A
US531491A 1955-08-30 1955-08-30 Cushioned valves Expired - Lifetime US2916019A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US531491A US2916019A (en) 1955-08-30 1955-08-30 Cushioned valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US531491A US2916019A (en) 1955-08-30 1955-08-30 Cushioned valves

Publications (1)

Publication Number Publication Date
US2916019A true US2916019A (en) 1959-12-08

Family

ID=24117850

Family Applications (1)

Application Number Title Priority Date Filing Date
US531491A Expired - Lifetime US2916019A (en) 1955-08-30 1955-08-30 Cushioned valves

Country Status (1)

Country Link
US (1) US2916019A (en)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1131059B (en) * 1961-02-10 1962-06-07 Passavant Werke Electromagnetic drive for control valves u. like
US3056421A (en) * 1959-12-21 1962-10-02 Carls William Solenoid valve housing and mount
US3101741A (en) * 1961-04-12 1963-08-27 Walter D Ludwig Pilot air operated valve
US3122973A (en) * 1964-03-03 lehmann
US3131722A (en) * 1961-11-27 1964-05-05 Ross Operating Valve Co Valve
US3200847A (en) * 1962-05-23 1965-08-17 Parker Hannifin Corp High pressure valve assembly
DE1234115B (en) * 1964-07-21 1967-02-09 Kracht Pumpen Hydraulically operated control slide with means for damping the movement of the slide piston
US3324890A (en) * 1965-06-09 1967-06-13 Continental Machines Solenoid valve having controlled retardation of spool motion
DE1252989B (en) * 1962-03-27 1967-10-26 Clark Equipment Co Control slide with damping chambers
DE1301720B (en) * 1964-09-21 1969-08-21 Bendix Corp Hand-operated control device for a working cylinder
DE1550295B1 (en) * 1965-05-25 1972-02-03 Hydroplast Malesherbes HYDRAULIC VALVE FOR PERIODIC CHANGEOVER OF HYDRAULIC ACTUATORS FOR MACHINE TOOLS WITH A DEVICE TO DAMPEN THE MOVEMENT OF THE PISTON VALVE
US3667075A (en) * 1970-02-24 1972-06-06 Wesley D Ballard Mattress spring bellows assembly as for hospitals, and the like
US3701366A (en) * 1970-08-14 1972-10-31 Atos Apparecchiature Oleodinam Hydraulic solenoid valve directly operated with adjustable over-ride speed
FR2145167A5 (en) * 1971-07-02 1973-02-16 Lucas Industries Ltd
US3770018A (en) * 1971-09-13 1973-11-06 N Sugimura Valve assembly with linear motors
US3896856A (en) * 1972-09-11 1975-07-29 Bosch Gmbh Robert Damped consumer valve arrangement
US4056126A (en) * 1975-03-19 1977-11-01 Robert Bosch Gmbh Spool valve arrangement
US4317469A (en) * 1979-02-05 1982-03-02 Pauliukonis Richard S Momentary contact diverter valve
US4320782A (en) * 1979-02-05 1982-03-23 Pauliukonis Richard S Universal momentary contact diverter
US4406307A (en) * 1981-03-31 1983-09-27 Double A Products Company Directional valve with spool transfer loop
US4456434A (en) * 1982-03-01 1984-06-26 Vickers, Incorporated Power transmission
US4543977A (en) * 1982-10-30 1985-10-01 Beloit Corporation Valves
US4669504A (en) * 1985-04-01 1987-06-02 Hitachi, Ltd. Closed loop type proportional electromagnetic valve for hydraulic control
US4886091A (en) * 1988-06-20 1989-12-12 Continental Machines, Inc. Anti-shock directional control fluid valve
EP1084360A1 (en) * 1998-05-22 2001-03-21 United States Environmental Protection Agency Fast valve and actuator
US20040046043A1 (en) * 2002-09-03 2004-03-11 Martin Luedicke Solenoid end cap assembly with flat surface
CN102889255A (en) * 2011-07-22 2013-01-23 深圳市普隆重工有限公司 Hydraulic gadder and oil distribution sliding valve thereof
US20150330527A1 (en) * 2012-12-31 2015-11-19 Vanderbilt University Directional control valve with spool delay mechanism
EP3029325A1 (en) * 2014-12-02 2016-06-08 Mitsubishi Heavy Industries, Ltd. Spool valve, hydraulic machine, and wind turbine power generating apparatus
CN110067875A (en) * 2019-05-13 2019-07-30 哈尔滨工程大学 A kind of large-flow high-frequency solenoid valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US265226A (en) * 1882-09-26 garrison
US1708507A (en) * 1926-05-05 1929-04-09 Ira C Jordan Coal pusher
US2145977A (en) * 1936-06-11 1939-02-07 Kingsbury Machine Tool Corp Solenoid actuated valve
US2600746A (en) * 1948-08-30 1952-06-17 Thompson Grinder Co Fluid pressure control valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US265226A (en) * 1882-09-26 garrison
US1708507A (en) * 1926-05-05 1929-04-09 Ira C Jordan Coal pusher
US2145977A (en) * 1936-06-11 1939-02-07 Kingsbury Machine Tool Corp Solenoid actuated valve
US2600746A (en) * 1948-08-30 1952-06-17 Thompson Grinder Co Fluid pressure control valve

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3122973A (en) * 1964-03-03 lehmann
US3056421A (en) * 1959-12-21 1962-10-02 Carls William Solenoid valve housing and mount
DE1131059B (en) * 1961-02-10 1962-06-07 Passavant Werke Electromagnetic drive for control valves u. like
US3101741A (en) * 1961-04-12 1963-08-27 Walter D Ludwig Pilot air operated valve
US3131722A (en) * 1961-11-27 1964-05-05 Ross Operating Valve Co Valve
DE1252989B (en) * 1962-03-27 1967-10-26 Clark Equipment Co Control slide with damping chambers
US3200847A (en) * 1962-05-23 1965-08-17 Parker Hannifin Corp High pressure valve assembly
DE1234115B (en) * 1964-07-21 1967-02-09 Kracht Pumpen Hydraulically operated control slide with means for damping the movement of the slide piston
DE1301720B (en) * 1964-09-21 1969-08-21 Bendix Corp Hand-operated control device for a working cylinder
DE1550295B1 (en) * 1965-05-25 1972-02-03 Hydroplast Malesherbes HYDRAULIC VALVE FOR PERIODIC CHANGEOVER OF HYDRAULIC ACTUATORS FOR MACHINE TOOLS WITH A DEVICE TO DAMPEN THE MOVEMENT OF THE PISTON VALVE
US3324890A (en) * 1965-06-09 1967-06-13 Continental Machines Solenoid valve having controlled retardation of spool motion
US3667075A (en) * 1970-02-24 1972-06-06 Wesley D Ballard Mattress spring bellows assembly as for hospitals, and the like
US3701366A (en) * 1970-08-14 1972-10-31 Atos Apparecchiature Oleodinam Hydraulic solenoid valve directly operated with adjustable over-ride speed
FR2145167A5 (en) * 1971-07-02 1973-02-16 Lucas Industries Ltd
US3847063A (en) * 1971-07-02 1974-11-12 Lucas Industries Ltd Vacuum operable units for ignition distributors
USRE31189E (en) * 1971-07-02 1983-03-29 Lucas Industries Limited Vacuum operable units for ignition distributors
US3770018A (en) * 1971-09-13 1973-11-06 N Sugimura Valve assembly with linear motors
US3896856A (en) * 1972-09-11 1975-07-29 Bosch Gmbh Robert Damped consumer valve arrangement
US4056126A (en) * 1975-03-19 1977-11-01 Robert Bosch Gmbh Spool valve arrangement
US4317469A (en) * 1979-02-05 1982-03-02 Pauliukonis Richard S Momentary contact diverter valve
US4320782A (en) * 1979-02-05 1982-03-23 Pauliukonis Richard S Universal momentary contact diverter
US4406307A (en) * 1981-03-31 1983-09-27 Double A Products Company Directional valve with spool transfer loop
US4456434A (en) * 1982-03-01 1984-06-26 Vickers, Incorporated Power transmission
US4543977A (en) * 1982-10-30 1985-10-01 Beloit Corporation Valves
US4669504A (en) * 1985-04-01 1987-06-02 Hitachi, Ltd. Closed loop type proportional electromagnetic valve for hydraulic control
US4886091A (en) * 1988-06-20 1989-12-12 Continental Machines, Inc. Anti-shock directional control fluid valve
EP1084360A4 (en) * 1998-05-22 2005-10-05 Us Environment Fast valve and actuator
EP1084360A1 (en) * 1998-05-22 2001-03-21 United States Environmental Protection Agency Fast valve and actuator
US20040046043A1 (en) * 2002-09-03 2004-03-11 Martin Luedicke Solenoid end cap assembly with flat surface
US7044400B2 (en) * 2002-09-03 2006-05-16 Siemens Diesel Systems Technology Solenoid end cap assembly with flat surface
CN102889255A (en) * 2011-07-22 2013-01-23 深圳市普隆重工有限公司 Hydraulic gadder and oil distribution sliding valve thereof
CN102889255B (en) * 2011-07-22 2015-05-20 深圳市普隆重工有限公司 Hydraulic gadder and oil distribution sliding valve thereof
US20150330527A1 (en) * 2012-12-31 2015-11-19 Vanderbilt University Directional control valve with spool delay mechanism
US9599248B2 (en) * 2012-12-31 2017-03-21 Vanderbilt University Directional control valve with spool delay mechanism
EP3029325A1 (en) * 2014-12-02 2016-06-08 Mitsubishi Heavy Industries, Ltd. Spool valve, hydraulic machine, and wind turbine power generating apparatus
CN110067875A (en) * 2019-05-13 2019-07-30 哈尔滨工程大学 A kind of large-flow high-frequency solenoid valve
CN110067875B (en) * 2019-05-13 2021-04-20 哈尔滨工程大学 Large-flow high-frequency electromagnetic valve

Similar Documents

Publication Publication Date Title
US2916019A (en) Cushioned valves
US2409517A (en) Valve construction
US3434390A (en) Valve control apparatus
US3623509A (en) Check valve controlling hydraulic apparatus
GB1158898A (en) Improvements in or relating to Gradually Adjustable Shock Absorbers
EP0151174A1 (en) Three-way proportional valve.
US2363111A (en) Hydraulic valve
US2927604A (en) Check valve having closed internal circuit hydraulic system
FI76195C (en) Valve
US3042005A (en) Dynamic pressure feedback servo valve
US2989616A (en) Servo-mechanism for controlling the movements of an electrode in an electro-erosion machine
US2597443A (en) Oscillator
US4639704A (en) Debris tolerant solenoid
US1798973A (en) Control device for valves
US2961001A (en) Pilot controlled valve
US1150925A (en) Dash-pot.
US3318332A (en) Valve operating mechanism
US2811170A (en) Solenoid pilot controlled main valve for machine tools or the like
US2893353A (en) Three position actuator cylinder
US3636978A (en) Hydraulic pressure feedback control valve
KR20010062123A (en) Hydraulic shock absorber
US2340399A (en) Fluid control valve
US3770018A (en) Valve assembly with linear motors
KR102086117B1 (en) Proportional pressure-reducing valve with spool having improved alignment performance
US3470908A (en) Variable hydraulic control device