US3608586A - Friction pads for no-spring model directional valves - Google Patents

Friction pads for no-spring model directional valves Download PDF

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Publication number
US3608586A
US3608586A US3608586DA US3608586A US 3608586 A US3608586 A US 3608586A US 3608586D A US3608586D A US 3608586DA US 3608586 A US3608586 A US 3608586A
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United States
Prior art keywords
plunger
bore
spool
pad
spring
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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
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Leo T Daggy Jr
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Vickers Inc
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Sperry Rand Corp
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Assigned to SPERRY CORPORATION reassignment SPERRY CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SPERRY RAND CORPORATION
Assigned to VICKERS, INCORPORATED reassignment VICKERS, INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SPERRY CORPORATION A DE CORP.
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    • 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
    • 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
    • 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
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/44—Clasp, clip, support-clamp, or required component thereof
    • Y10T24/44573—Clasp, clip, support-clamp, or required component thereof including track or way guided and retained gripping member
    • Y10T24/44581—Biased by distinct spring
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members

Definitions

  • Solenoid-operated directional valves of the sliding spool type such for example as illustrated in Gardiner U.S. Pat. No. 2,591,800, have solenoid push pins, or actuating plungers, through which the valve spool is pushed by the actuating solenoid.
  • a further object is to provide such a retention means which can be mounted in a cartridge assembly surrounding the plunger.
  • FIG. 1 is a longitudinal sectional view of a double solenoidactuated pilot valve incorporating a preferred form of the present invention.
  • H0. 2 is an enlarged view corresponding to a portion of HO. 1.
  • H6. 3 is a fragmentary sectional view taken on line 3-3 of FIG. 2.
  • the invention consists of a solenoid-operated fluid control valve having a body provided with a cylindrical bore intersected by axially spaced laterally extending fluid ports, and a freely floating spool slidable in the bore together with oppositely acting solenoids, each having an operating plunger arranged to actuate the spool in one direction or the other, and wherein an improved retention means is provided which comprises one or more radially movable friction pads contacting one of the plungers and a C-shaped spring surrounding the plunger and the pads to maintain a substantially fixed frictional drag on the plunger for holding the spool in whatever position it occupies at the conclusion of a solenoid actuation.
  • the solenoid-operated directional valve comprises a main body having a central bore 12 in which is mounted a freely slidable spool 14.
  • the usual laterally extending ports such as 16, 18, 20, 22 and 24 are variously connected for directional flow control in a well-understood manner.
  • the spool 14 in FIG. 1 is illustrated in an intermediate position and normally occupies a position either to the right or to the left of that illustrated.
  • Actuating solenoids 26 and 28 are bolted to the ends of the body 10 and are provided with actuating pushpins or plungers 30 and 32 for pushing the spool 14 to the right and to the left respectively.
  • the plunger 30 has a head 34 which is received in a slot 36 in the end of the spool 14.
  • the bore 12 is provided with extension bores 38 and 40, each of which is closed by a closure member 42.
  • the closure members 42 are retained in the bore extensions 38 and 40 by snaprings 44 and carry sealing rings 46 and 48 in contact with the bore extension and the plunger respectively.
  • the improved retention means for the actuating plungers and the valve spool includes a unitary cartridge member 50 which surrounds the plunger and is retained against the closure member 42 by a spring 52.
  • the cartridge member 50 includes a plurality of radial stepped bores 54, each of which carries a shouldered friction pad 56.
  • the cartridge 50 has a neck portion 58 surrounding the bores 54 for the purpose of receiving a C-shaped retaining spring 60.
  • the spring 60 abuts the outer end of the friction pads 56 to urge them radially inward against the plunger 30.
  • a pin 62 (FIG. 3) is pressed into the cartridge 50 and prevents displacement of the spring 60.
  • the plunger 30 and the friction pads 56 are made of dissimilar metals, for example hardened steel and bronze respectively.
  • the Cspring 60 occupies a minimal amount of space and exerts a constant radially inward force on the friction pads with a high degree of reliability and durability.
  • a solenoid-operated fluid control valve having a body provided with a cylindrical bore intersected by axially spaced laterally extending fluid ports, a freely floating spool slidable in the bore, and oppositely acting solenoids, each having an operating plunger arranged to actuate the spool in one direction or the other, the improvement comprising a radially movable friction pad contacting one of the plungers, a C shaped spring surrounding the plunger and pad to maintain a substantially fixed frictional drag on the plunger and hold the spool in whatever position it occupies at the conclusion of a solenoid actuation and means holding the pad from axial movement in the bore.
  • the pad comprises a shouldered pin slidably mounted in a stepped bore, whereby the inward motion of the pin is limited sufficiently to permit initial assembly of the plunger while the spring maintains the pin in its most inward position radiallyv 3.
  • the means includes an extension of the cylindrical bore adjacent to a solenoid, a plunger retention cartridge positioned in the bore extension and providing a mounting for the pad and its spring, a closure member removably mounted in the end of the bore extension, inner and outer seal rings between the closure and the plunger and the bore extension respectively, and a spring holding the cartridge outwardly against the inner face of the closure.

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

Abstract

A solenoid-operated valve having a free-floating, sliding spool is provided with frictional detent pins radially urged inwardly by a C-shaped spring. The pins are mounted in a cartridge member having radial bores.

Description

United States Patent inventor Leo T. Baggy, Jr.
Birmingham, Mich.
Appl. No. 21,571
Filed Mar. 23, 1970 Patented Sept. 28, 1971 Assignee Sperry Rand Corporatio Troy, Mich. r
FRICTION PADS FOR NO-SPRING MODEL Primary Examiner-Henry T. Klinksiek Attorney-Van Meter and George DIRECTIONAL VALVES 3 Claims, 3 Drawing Figs.
US. (I 137/625.65, 251/297, 287/58, 285/302, 24/263, 248/414 lllt- A olenoid-operated vaIvg having a f 'ee-fl a[. of Search ing sliding spool provided whh frictional dgtent pins radi- 625.64, 248/414; ally urged inwardly by a C-shaped spring. The pins are 2 287/58 mounted in a cartridge member having radial bores.
so i r v 26 42 a2 20 44 I I 44 38 ill l 'l PATENTED S EP28 I97! INVENTOR. LEO T. DAGGY JR.
A M M1 ATTORNEYS FRICTION PADS FOR NO-SPRING MODEL DIRECTIONAL VALVES Solenoid-operated directional valves of the sliding spool type, such for example as illustrated in Gardiner U.S. Pat. No. 2,591,800, have solenoid push pins, or actuating plungers, through which the valve spool is pushed by the actuating solenoid. ln valves which have no biasing springs for the spool, that is, in which the spool is freely floating, a retention means is necessary to keep the spool from drifting away from its actuated position while neither solenoid is activated It is an object of the present invention to provide an improved retention means for the actuating plunger of such a valve which is simple, inexpensive and reliable in operation.
A further object is to provide such a retention means which can be mounted in a cartridge assembly surrounding the plunger. In The Drawing:
FIG. 1 is a longitudinal sectional view of a double solenoidactuated pilot valve incorporating a preferred form of the present invention.
H0. 2 is an enlarged view corresponding to a portion of HO. 1.
H6. 3 is a fragmentary sectional view taken on line 3-3 of FIG. 2.
The invention consists of a solenoid-operated fluid control valve having a body provided with a cylindrical bore intersected by axially spaced laterally extending fluid ports, and a freely floating spool slidable in the bore together with oppositely acting solenoids, each having an operating plunger arranged to actuate the spool in one direction or the other, and wherein an improved retention means is provided which comprises one or more radially movable friction pads contacting one of the plungers and a C-shaped spring surrounding the plunger and the pads to maintain a substantially fixed frictional drag on the plunger for holding the spool in whatever position it occupies at the conclusion of a solenoid actuation.
Referring now to HO. 1, the solenoid-operated directional valve comprises a main body having a central bore 12 in which is mounted a freely slidable spool 14. The usual laterally extending ports such as 16, 18, 20, 22 and 24 are variously connected for directional flow control in a well-understood manner. The spool 14 in FIG. 1 is illustrated in an intermediate position and normally occupies a position either to the right or to the left of that illustrated.
Actuating solenoids 26 and 28 are bolted to the ends of the body 10 and are provided with actuating pushpins or plungers 30 and 32 for pushing the spool 14 to the right and to the left respectively. As shown in more detail in FIG. 2, the plunger 30 has a head 34 which is received in a slot 36 in the end of the spool 14.
The bore 12 is provided with extension bores 38 and 40, each of which is closed by a closure member 42. The closure members 42 are retained in the bore extensions 38 and 40 by snaprings 44 and carry sealing rings 46 and 48 in contact with the bore extension and the plunger respectively.
The improved retention means for the actuating plungers and the valve spool includes a unitary cartridge member 50 which surrounds the plunger and is retained against the closure member 42 by a spring 52. The cartridge member 50 includes a plurality of radial stepped bores 54, each of which carries a shouldered friction pad 56. The cartridge 50 has a neck portion 58 surrounding the bores 54 for the purpose of receiving a C-shaped retaining spring 60. The spring 60 abuts the outer end of the friction pads 56 to urge them radially inward against the plunger 30. A pin 62 (FIG. 3) is pressed into the cartridge 50 and prevents displacement of the spring 60.
ln operation whenever either of the solenoids 26 or 28 is energized, the corresponding plunger 30 or 32 pushes the spool 14 to the right or to the left respectively. The plunger 30 slides through the cartridge 50, overcoming the frictional force of the retention pads 56. When the solenoid is deenergized, the C-spring 60 maintains a radially inward force on the friction pads 56 and on the spool 30. Due to the two-way connection between the plunger 30 and the spool 14 at the head 34 and the slot 36, the spool is prevented from drifting.
Preferably the plunger 30 and the friction pads 56 are made of dissimilar metals, for example hardened steel and bronze respectively. The Cspring 60 occupies a minimal amount of space and exerts a constant radially inward force on the friction pads with a high degree of reliability and durability.
I claim:
1. In a solenoid-operated fluid control valve having a body provided with a cylindrical bore intersected by axially spaced laterally extending fluid ports, a freely floating spool slidable in the bore, and oppositely acting solenoids, each having an operating plunger arranged to actuate the spool in one direction or the other, the improvement comprising a radially movable friction pad contacting one of the plungers, a C shaped spring surrounding the plunger and pad to maintain a substantially fixed frictional drag on the plunger and hold the spool in whatever position it occupies at the conclusion of a solenoid actuation and means holding the pad from axial movement in the bore.
2. The valve defined in claim 1 wherein the pad comprises a shouldered pin slidably mounted in a stepped bore, whereby the inward motion of the pin is limited sufficiently to permit initial assembly of the plunger while the spring maintains the pin in its most inward position radiallyv 3. The valve defined in claim 1 wherein the means includes an extension of the cylindrical bore adjacent to a solenoid, a plunger retention cartridge positioned in the bore extension and providing a mounting for the pad and its spring, a closure member removably mounted in the end of the bore extension, inner and outer seal rings between the closure and the plunger and the bore extension respectively, and a spring holding the cartridge outwardly against the inner face of the closure.

Claims (3)

1. In a solenoid-operated fluid control valve having a body provided with a cylindrical bore intersected by axially spaced laterally extending fluid ports, a freely floating spool slidable in the bore, and oppositely acting solenoids, each having an operating plunger arranged to actuate the spool in one direction or the other, the improvement comprising a radially movable friction pad contacting one of the plungers, a C-shaped spring surrounding the plunger and pad to maintain a substantially fixed frictional drag on the plunger and hold the spool in whatever position it occupies at the conclusion of a solenoid actuation and means holding the pad from axial movement in the bore.
2. The valve defined in claim 1 wherein the pad comprises a shouldered pin slidably mounted in a stepped bore, whereby the inward motion of the pin is limited sufficiently to permit initial assembly of the plunger while the spring maintains the pin in its most inward position radially.
3. The valve defined in claim 1 wherein the means includes an extension of the cylindrical bore adjacent to a solenoid, a plunger retention cartridge positioned in the bore extension and providing a mounting for the pad and its spring, a closure member removably mounted in the end of the bore extension, inner and outer seal rings between the closure and the plunger and the bore extension respectively, and a spring holding the cartridge outwardly against the inner face of the closure.
US3608586D 1970-03-23 1970-03-23 Friction pads for no-spring model directional valves Expired - Lifetime US3608586A (en)

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Application Number Priority Date Filing Date Title
US2157170A 1970-03-23 1970-03-23

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US3608586D Expired - Lifetime US3608586A (en) 1970-03-23 1970-03-23 Friction pads for no-spring model directional valves

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US (1) US3608586A (en)
JP (1) JPS5140287B1 (en)
CA (1) CA926372A (en)
DE (1) DE2112717C3 (en)
FR (1) FR2084855A5 (en)
GB (1) GB1337850A (en)
SE (1) SE358943B (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899003A (en) * 1974-01-02 1975-08-12 Atos Oleodinamica Spa Fluid dynamic valve with direct electromagnetic control with slider-latching device
US4056126A (en) * 1975-03-19 1977-11-01 Robert Bosch Gmbh Spool valve arrangement
US4185661A (en) * 1978-08-17 1980-01-29 Double A Products Solenoid operated directional valve with detent mechanism
US4462427A (en) * 1982-02-26 1984-07-31 Mac Valves, Inc. Four-way stacking valve with common electrical conduit and body mounted individual exhaust flow controls that project through the cover
US4465100A (en) * 1984-05-09 1984-08-14 Mac Valves, Inc. Four-way stacking valve with common electrical conduit and individual body mounted exhaust flow controls
US4491152A (en) * 1982-02-26 1985-01-01 Mac Valves, Inc. Four-way stacking valve with common electrical conduit and body mounted individual exhaust flow controls that project through the cover
US4576203A (en) * 1984-05-15 1986-03-18 Hr Textron Inc. Pressure-operated eccentric shaft coupling
US4796860A (en) * 1987-10-16 1989-01-10 Eaton Corporation Valve spool detent
US5375625A (en) * 1993-02-25 1994-12-27 Warren Rupp, Inc. Valve body assembly with detent and locking mechanism
US20180195622A1 (en) * 2017-01-12 2018-07-12 Shimadzu Corporation Slide valve
US11098805B1 (en) * 2020-05-13 2021-08-24 The Boeing Company Shuttle valve with detent mechanism

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1693032A (en) * 1926-10-29 1928-11-27 Guy J Henry Floating-valve seat
US2452430A (en) * 1947-01-17 1948-10-26 Clark Quick disconnect coupling
US2973972A (en) * 1956-08-23 1961-03-07 Holland Electro C V Detachable junction between the ends of two suction cleaner tubes
US3324885A (en) * 1963-11-04 1967-06-13 Austin S Beech & Company Ltd Spool valves

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1693032A (en) * 1926-10-29 1928-11-27 Guy J Henry Floating-valve seat
US2452430A (en) * 1947-01-17 1948-10-26 Clark Quick disconnect coupling
US2973972A (en) * 1956-08-23 1961-03-07 Holland Electro C V Detachable junction between the ends of two suction cleaner tubes
US3324885A (en) * 1963-11-04 1967-06-13 Austin S Beech & Company Ltd Spool valves

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3899003A (en) * 1974-01-02 1975-08-12 Atos Oleodinamica Spa Fluid dynamic valve with direct electromagnetic control with slider-latching device
US4056126A (en) * 1975-03-19 1977-11-01 Robert Bosch Gmbh Spool valve arrangement
US4185661A (en) * 1978-08-17 1980-01-29 Double A Products Solenoid operated directional valve with detent mechanism
US4491152A (en) * 1982-02-26 1985-01-01 Mac Valves, Inc. Four-way stacking valve with common electrical conduit and body mounted individual exhaust flow controls that project through the cover
US4462427A (en) * 1982-02-26 1984-07-31 Mac Valves, Inc. Four-way stacking valve with common electrical conduit and body mounted individual exhaust flow controls that project through the cover
FR2564559A1 (en) * 1982-02-26 1985-11-22 Mac Valves Inc Four-way pneumatic distributor and assembly comprising several stacked distributors.
US4465100A (en) * 1984-05-09 1984-08-14 Mac Valves, Inc. Four-way stacking valve with common electrical conduit and individual body mounted exhaust flow controls
FR2564169A1 (en) * 1984-05-09 1985-11-15 Mac Valves Inc Stackable four-way pneumatic distributor.
US4491151A (en) * 1984-05-09 1985-01-01 Mac Valves, Inc. Four-way stacking valve with common electrical conduit and individual body mounted exhaust flow controls
US4576203A (en) * 1984-05-15 1986-03-18 Hr Textron Inc. Pressure-operated eccentric shaft coupling
US4796860A (en) * 1987-10-16 1989-01-10 Eaton Corporation Valve spool detent
FR2621972A1 (en) * 1987-10-16 1989-04-21 Eaton Corp DEVICE FOR CLOSING A VALVE DRAWER
GB2211276A (en) * 1987-10-16 1989-06-28 Eaton Corp Valve spool detent
GB2211276B (en) * 1987-10-16 1991-10-16 Eaton Corp Valve spool detent
US5375625A (en) * 1993-02-25 1994-12-27 Warren Rupp, Inc. Valve body assembly with detent and locking mechanism
US20180195622A1 (en) * 2017-01-12 2018-07-12 Shimadzu Corporation Slide valve
US11098805B1 (en) * 2020-05-13 2021-08-24 The Boeing Company Shuttle valve with detent mechanism

Also Published As

Publication number Publication date
CA926372A (en) 1973-05-15
DE2112717A1 (en) 1971-10-14
GB1337850A (en) 1973-11-21
SE358943B (en) 1973-08-13
JPS5140287B1 (en) 1976-11-02
FR2084855A5 (en) 1971-12-17
DE2112717C3 (en) 1973-07-12
DE2112717B2 (en) 1972-12-21

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