US3584646A - Spool valve - Google Patents

Spool valve Download PDF

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Publication number
US3584646A
US3584646A US3584646DA US3584646A US 3584646 A US3584646 A US 3584646A US 3584646D A US3584646D A US 3584646DA US 3584646 A US3584646 A US 3584646A
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US
United States
Prior art keywords
spool
members
ports
casing
assembly
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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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English (en)
Inventor
Peter B Olmsted
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.)
Olmsted Products Co
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Olmsted Products Co
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Publication date
Application filed by Olmsted Products Co filed Critical Olmsted Products Co
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Publication of US3584646A publication Critical patent/US3584646A/en
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Expired - Lifetime legal-status Critical Current

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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
    • 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
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87217—Motor
    • Y10T137/87225—Fluid motor

Definitions

  • ABSTRACT A four-way spool valve in which the spool assembly is hollow and consists of two relatively telescoped spool members. The hollow interiors of the communicate exclusively with transverse o the spool members and the spool members [54] SPOOL VALVE 9 Claims, 4 Drawing Figs.
  • spool members penings formed in are movable relative to each other and to the valve casin cooperate with the casing to define four valve 0 1 l 1 k 6 1 F [51] lnt.C1.&, etc........ [50] FieldofSearch....
  • the spool valve of this invention is particularly adapted for use with a fluid actuated cylinder assembly in which the piston rod is advanced to perform work, retracted in preparation for the next work cycle, and held at rest between cycles.
  • rapid advance of the piston rod is desirable for efficiency purposes.
  • This is accomplished in the spool valve of this invention by providing a "regeneration" position of the spool assembly in which flow of fluid from the rod end of the cylinder joins the flow from the pump feed fluid to the head end of the cylinder.
  • the spool assembly is moved to a work" position in which the rod end of the cylinder connects to tank.
  • FIG. l is a longitudinal sectional view of the spool valve of this invention, illustrating diagrammatically the assembly of the spool valve with a fluid actuated cylinder assembly and showing the valve components in the "rest" position of the valve;
  • FIG. 2 is a longitudinal sectional view of the spool valve of this invention, illustrated similarly to FIG. 1, showing the spool assembly moved to a position in which the valve com ponents define the work position of the valve;
  • FIGS. 3 and 4 are longitudinal sectional views similar to FIGS. 1 and 2 showing the valve components in positions corresponding to return" and regeneration valve positions.
  • the improved spool valve of this invention is illustrated in FIG. 1 connected to a fluid operated cylinder assembly 12, a pump 14, and a tank 16 which supplies fluid to the pump 14.
  • the pump 14 and the tank 16 are shown diagrammatically, since they are conventional, it being understood that the pump 14 communicates in the usual way with tank 16.
  • the valve consists of a casing 18 in which a longitudinal bore 20 is formed, the bore having an axis 22. Annular lands 24 are formed in the casing 18 so that they constitute a portion of the bore 20 and cooperate to form four axially spaced chambers 26, 28, 30 and 32 in the casing 18.
  • a tank port 34 formed in the casing 18 connects the chamber 26 to a passage 36 that communicates with the tank 16.
  • a first work port 38 in the casing 18 communicates with the chamber 28 and with a conduit 40 which is in turn connected to the blind end 42 of the cylinder 44 in the cylinder assembly 12.
  • a pump port 46 in the casing 18 communicates with the chamber 30 and with a conduit 48 connected to the pump 14.
  • a second work port 50 communicates with the valve chamber 32 and with a conduit 52 which connects to the rod end 45 of the cylinder 44.
  • a spool assembly 54 is slidably supported in the bore 20 in substantial sealing engagement with the lands 24 at a position axially aligned with the bore axis 22.
  • the spool assembly 54 consists of a pair of spool members 56 and 57 which are movable toward each other to the limit positions shown in FIG. 1. Pilot fluid chambers 58 and 60 are formed at the ends of the spool assembly 54 when the spool assembly is in the position shown in FIG. 1.
  • the spool members 56 and 57 are movable apart to the limit positions shown in FIG. 4 in which opposite ends of the spool assembly 54 engage the casing end walls 62 and 64.
  • the first spool member 56 consists of a body 66 of a diameter corresponding substantially to the diameter of the lands 24 and having a reduced diameter tubular extension 68.
  • the tubular extension 68 contains an internal cavity 70 which extends into the body 66 and is connected to a transverse passage 72 in a reduced diameter portion 74 of the body 66. It can be seen from FIGS. 14 that in all four positions of the spool assembly 54, the opening 72 communicates with the tank port 34.
  • the body 66 is formed with an enlarged head 76 which is engageable with an internal shoulder 78 in the casing 18 to limit movement of the spool member 56 in response to a supply of fluid under pressure to the pilot fluid chamber 58.
  • the second spool member 57 consists of a body 80 provided with an internal chamber 82 into which the first spool member extension 68 is telescoped. As shown in FIGS. 1 and 4, the spool member extension 68 is telescopable substantially all the way into the chamber 82 (FIG. 1) to an inner position and is movable to an outer position (FIG. 4) in which the extension 68 is substantially withdrawn from the chamber 82. As shown in FIG. 1, when the extension 68 is in its inner position, an external shoulder 88 on the spool member 56 is spaced from the inner end surface 90 of the spool member 57. As a result, fluid under pressure in the valve chamber 30 applies oppositely directed forces to the spool members 56 and 57 tending to urge them apart.
  • the spool member 57 has a reduced diameter portion 92 which cooperates with the casing 18 to form an annular chamber 94 therebetween.
  • Inclined passages 96 in the body 80 provide for continuous communication of the chamber 94 and the internal chamber 82 for a purpose to appear presently.
  • An external shoulder 93 on the spool member 57 is engageable with a casing stop shoulder 95 to limit movement of member 57 toward member 56.
  • pilot pressure fluid is again supplied to chamber 60 while continuing to vent pilot chamber 58.
  • This provides for movement of the spool member 57 to the position shown in FIG. 2 in which the tubular extension 68 is telescoped further into the chamber 82.
  • the spool member 57 In this position of the spool member 57, it blocks communication between the pump chamber 30 and the work chamber 32 and provides for communication of the work chamber 32 with the internal spool chamber 82 through the passages 96.
  • the chamber 32 connects to tank 16 to in turn connect the rod end 45 of the cylinder 12 to tank. Since the position of the spool member 56 has not changed, fluid under pressure continues to be supplied to the blind end 42 of the cylinder 44.
  • the pilot chamber 60 is vented and fluid under pressure is supplied to the chamber 58 so as to move the spool assembly 54 to the position shown in H0. 3 in which the spool members 56 and 57 are in the same relative positions that they were in in the FIG. 2 "work position.
  • the return" position of the spool valve shown in FIG. 3 the work port 38 communicates with the tank port 34, the work port 50 communicates with the pump port 46 and communication of any of the valve ports through the hollow interior of the spool assembly 54 is precluded because of the isolated position of the chamber 94.
  • this invention provides a spool valve 10 in which four-way operation of the spool valve is readily accomplished by virtue of the hollow two piece construction of the spool assembly 54. This enables movement of the spool assembly to the four positions illustrated in FIGS. l4, inclusive, so as to move the cylinder assembly l2 efficiently through a work cycle.
  • a spool assembly having a longitudinal axis, said spool assembly comprising a pair of members one of which has a tubular portion extending along said axis, means forming an opening in said one member communicating with said tubular portion, the other one of said spool members having a tubular portion telescopable over said first tubular portion, means forming an opening in said other one of said spool members communicating with said tubular portion thereof, the interiors of said tubular portions communicating exclusively with said openings, said members being mounted in said casing for relative sliding movement along said axis to different positions relative to said ports in which at least one of said openings communicates with at least one of said ports.
  • a spool valve according to claim 1 wherein said spool members are provided with facing surfaces arranged in a spaced relation in all moved positions of said spool members.
  • a spool valve according to claim 1 wherein said casing cooperates with said spool members in the telescoped positions of said members to define a pair of pilot fluid chambers in said casing at opposite ends of said spool assembly.
  • a spool valve according to claim 1 wherein said plurality of ports consists of a pump port, a tank port and two work ports, said spool members being movable in directions away from each other to positions in which communication of said pump port with both said work ports is provided and communication between said tank port and all other ports is blocked.
  • a spool valve according to claim 3 wherein said plurality of ports includes a pump port, a tank port and two work ports, said spool assembly in relatively telescoped positions of said spool members providing for communication of said tank port with said work ports and blocking communication of said pump port with all other ports.
  • each of said spool members is movable in a direction away from the other spool member to provide for communication of said pump port with one of said work ports.
  • a spool valve comprising a casing having a bore, said casing being provided with a pump port, a tank port and two work ports which communicate with said bore, a spool assembly slidably mounted in said bore for movement axially thereof, said assembly comprising a first spool member having a body portion and a hollow extension, said body portion being of a diameter to slidably support said first spool member in said bore a second spool member telesco ed over said hollow extension and movable axially thereof etween limit positions,
  • said second spool member having an internal chamber communicating with the interior of said hollow extension, said spool members being provided with passages which communicate with said chamber and the interior of said hollow extension, said chamber and the interior of said extension communicating exclusively with said passages, said spool members being mounted in said bore for movement toward each other to one of said limit positions in which pilot fluid chambers are formed in said bore at opposite ends of said spool assembly, each of said spool members being movable in a direction away from the other spool member to a stop position in said casing, said spool members being relatively movable in said casing to different positions relative to said ports in which at least one of said passages communicates with at least one of said ports.
  • a spool valve according to claim 7 further including axially spaced lands in said bore supporting said spool assembly and defining a plurality of chambers spaced axially along said spool assembly, each of said chambers corresponding to and being in continual fluid communication with one of said ports.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Servomotors (AREA)
  • Braking Arrangements (AREA)
US3584646D 1969-12-04 1969-12-04 Spool valve Expired - Lifetime US3584646A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88222369A 1969-12-04 1969-12-04

Publications (1)

Publication Number Publication Date
US3584646A true US3584646A (en) 1971-06-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
US3584646D Expired - Lifetime US3584646A (en) 1969-12-04 1969-12-04 Spool valve

Country Status (4)

Country Link
US (1) US3584646A (de)
DE (1) DE2059076C3 (de)
FR (1) FR2071678A5 (de)
GB (1) GB1300306A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082032A (en) * 1974-11-13 1978-04-04 Raymond International, Inc. Control of hydraulically powered equipment
US4838308A (en) * 1987-10-16 1989-06-13 Thomas Charles E Multipurpose control valve
US20060037597A1 (en) * 2004-07-13 2006-02-23 National Paintball Supply, Inc. Valve for compressed gas gun
US20120017997A1 (en) * 2010-07-22 2012-01-26 Bendix Commercial Vehicle Systems Llc Latching valve
US8474487B2 (en) 2010-07-22 2013-07-02 Bendix Commercial Vehicle System Llc Latching valve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2149270B1 (de) * 1971-08-13 1974-03-29 Citroen Sa
DE2343662C2 (de) * 1973-08-30 1986-04-30 Robert Bosch Gmbh, 7000 Stuttgart Hydraulische Steuereinrichtung
JPS61201903A (ja) * 1985-03-06 1986-09-06 Nissan Motor Co Ltd 油圧アクチユエ−タの制御弁

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2771907A (en) * 1949-01-29 1956-11-27 Joy Mfg Co Pilot controlled piston type reversing valve
US2910050A (en) * 1955-06-13 1959-10-27 Homestead Valve Mfg Co Piston type multiport fluid pressure valve
US2998026A (en) * 1957-11-27 1961-08-29 Logansport Machine Company Differential pressure air valve
US3217745A (en) * 1963-06-10 1965-11-16 Jr Fred W Tate Hydraulic fluid control operating valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2771907A (en) * 1949-01-29 1956-11-27 Joy Mfg Co Pilot controlled piston type reversing valve
US2910050A (en) * 1955-06-13 1959-10-27 Homestead Valve Mfg Co Piston type multiport fluid pressure valve
US2998026A (en) * 1957-11-27 1961-08-29 Logansport Machine Company Differential pressure air valve
US3217745A (en) * 1963-06-10 1965-11-16 Jr Fred W Tate Hydraulic fluid control operating valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082032A (en) * 1974-11-13 1978-04-04 Raymond International, Inc. Control of hydraulically powered equipment
US4838308A (en) * 1987-10-16 1989-06-13 Thomas Charles E Multipurpose control valve
US20060037597A1 (en) * 2004-07-13 2006-02-23 National Paintball Supply, Inc. Valve for compressed gas gun
US20120017997A1 (en) * 2010-07-22 2012-01-26 Bendix Commercial Vehicle Systems Llc Latching valve
US8474487B2 (en) 2010-07-22 2013-07-02 Bendix Commercial Vehicle System Llc Latching valve
US8590571B2 (en) * 2010-07-22 2013-11-26 Bendix Commercial Vehicle Systems Llc Latching valve

Also Published As

Publication number Publication date
GB1300306A (en) 1972-12-20
DE2059076C3 (de) 1980-01-17
DE2059076A1 (de) 1971-06-16
DE2059076B2 (de) 1973-06-14
FR2071678A5 (de) 1971-09-17

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