US3528638A - Detent for valves with automatic release means - Google Patents

Detent for valves with automatic release means Download PDF

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Publication number
US3528638A
US3528638A US731378A US3528638DA US3528638A US 3528638 A US3528638 A US 3528638A US 731378 A US731378 A US 731378A US 3528638D A US3528638D A US 3528638DA US 3528638 A US3528638 A US 3528638A
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US
United States
Prior art keywords
detent
spool
valve
release means
valves
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
US731378A
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English (en)
Inventor
Lloyd D Finley
Kenneth R Lohbauer
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Application granted granted Critical
Publication of US3528638A publication Critical patent/US3528638A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F16K11/0704—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 comprising locking elements

Definitions

  • the detent mechanism is shown as included in the housing with a spool valve which might be used, as in the example given above, in association with the bucket lift arm mechanism of a loader.
  • the housing is in section to expose the detent mechanism, but the valve is not disclosed herein as it does not form a part of the invention and its specific construction may be varied considerably.
  • An extension of the spool of the valve to be controlled which in the present instance is a pilot valve for directing pilot fluid to an operating valve which controls the operation of a jack associated with the lift arm, is shown at 10.
  • the spool is controlled by a lever 12 pivotally supported at 14.
  • the valve is adjustable through the broken line positions indicated as R, H, L and F, representing raise, hold, lower and float.
  • a detent assembly generally indicated at 16 is also adjusted as by an arm 15 of the lever 12.
  • the detent mechanism includes a spool 18 adjustable in a suitable bore to which fluid, utilized as a signal pressure means, is introduced through a conduit 20.
  • Adjacent the bore in which spool 18 is reciprocally mounted are two or more detent assemblies, each having a ball 21, a plunger 22, a suitable cylindrical bore, and a spring 23, urging the plunger inwardly and urging the ball into contact with the spool 18.
  • Pressure for line 20 which is a signal pressure, can be derived from any suitable source, and in some cases is taken from a pressurized part of the system, as in the Erickson patent referred to above, wherein the pressure is taken directly from the lift jack.
  • the pressure in the detent chamber is maintained temporarily in order to permit movement of the spool to its hold position and then is relieved through a restricted orifice 28 by means of which it is vented to a tank or reservoir 30.
  • the spring chambers in the detent cylinders are also vented to atmospheric pressure by passages shown at 31 and 32.
  • the detent mechanism of the present invention is illustrated as having a spool separate from the spool of the valve, the same system can be employed by simply making the spool of any conventional spool valve longer and combining with it the other elements of the system as herein shown. It is, however, an advantage in some cases to use a separate spool in the interest of saving space where a long pilot spool is impractical.
  • Detent and release means for holding a valve in an open position against a normal closing force comprising a spool with a detent groove, a detent assembly including a cylinder and piston, resilient means urging the piston toward the spool, a detent part supported by the piston to enter the groove, a housing embracing the spool and having a chamber communicating with a surface of the piston adjacent the spool, means to introduce fluid under pressure to said chamber to cause retraction of the piston to permit the valve to close, and a restricted orifice venting the chamber to atmosphere so that the pressure which causes retraction is momentary.
  • Detent and release means for holding a valve in an open position against a normal closing force comprising a spool with a detent groove, a detent assembly including a cylinder and piston, resilient means urging the piston toward the spool, a detent part supported by the piston to enter the groove, a housing embracing the spool and having a chamber communicating with a surface of the piston adjacent the spool, and means to introduce fluid under pressure to said chamber to cause retraction of the piston to permit the valve to close, said means including a passage and means for opening the passage to the chamber when the detent is engaged and closing the passage from the chamber when the detent is released.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Multiple-Way Valves (AREA)
  • Servomotors (AREA)
US731378A 1968-05-23 1968-05-23 Detent for valves with automatic release means Expired - Lifetime US3528638A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73137868A 1968-05-23 1968-05-23

Publications (1)

Publication Number Publication Date
US3528638A true US3528638A (en) 1970-09-15

Family

ID=24939243

Family Applications (1)

Application Number Title Priority Date Filing Date
US731378A Expired - Lifetime US3528638A (en) 1968-05-23 1968-05-23 Detent for valves with automatic release means

Country Status (3)

Country Link
US (1) US3528638A (cs)
JP (1) JPS4812209B1 (cs)
FR (1) FR2009201A1 (cs)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646968A (en) * 1970-09-30 1972-03-07 Sperry Rand Corp Power transmission valve with detent
US5638866A (en) * 1996-03-01 1997-06-17 Dana Corporation Detent arrangement for holding hydraulic valve members stroked
EP3627016A1 (de) * 2018-09-19 2020-03-25 Continental Automotive GmbH Ventil
US20230228345A1 (en) * 2020-06-23 2023-07-20 Bieri Hydraulik Ag Valve device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2205633B1 (cs) * 1972-11-03 1978-08-04 Cessna Aircraft Co
FR2846719B1 (fr) * 2002-10-31 2006-02-03 Mannesmann Rexroth Sa Distributeur de fluide sous pression a armature suspendue
FR3042574B1 (fr) 2015-10-19 2018-05-04 Robert Bosch Gmbh Distributeur de liquide hydraulique sous une pression commandee

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2326487A (en) * 1941-08-20 1943-08-10 Glenn L Martin Co Valve
US2689585A (en) * 1952-06-23 1954-09-21 Bendix Aviat Corp Self-holding valve
US2780240A (en) * 1952-06-03 1957-02-05 Paul D Madak Fluid safety check and cushioning device
US3228417A (en) * 1963-08-13 1966-01-11 American Meter Co Pressure regulator with high pressure cut off
US3426779A (en) * 1967-02-08 1969-02-11 Kerotest Mfg Corp Pressure actuated relief valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2326487A (en) * 1941-08-20 1943-08-10 Glenn L Martin Co Valve
US2780240A (en) * 1952-06-03 1957-02-05 Paul D Madak Fluid safety check and cushioning device
US2689585A (en) * 1952-06-23 1954-09-21 Bendix Aviat Corp Self-holding valve
US3228417A (en) * 1963-08-13 1966-01-11 American Meter Co Pressure regulator with high pressure cut off
US3426779A (en) * 1967-02-08 1969-02-11 Kerotest Mfg Corp Pressure actuated relief valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646968A (en) * 1970-09-30 1972-03-07 Sperry Rand Corp Power transmission valve with detent
US5638866A (en) * 1996-03-01 1997-06-17 Dana Corporation Detent arrangement for holding hydraulic valve members stroked
US5743297A (en) * 1996-03-01 1998-04-28 Dana Corporation Detent arrangement for holding hydraulic valve member stroked
EP3627016A1 (de) * 2018-09-19 2020-03-25 Continental Automotive GmbH Ventil
US20230228345A1 (en) * 2020-06-23 2023-07-20 Bieri Hydraulik Ag Valve device
US12025240B2 (en) * 2020-06-23 2024-07-02 Bibri Hydraulik Ag Valve device

Also Published As

Publication number Publication date
JPS4812209B1 (cs) 1973-04-19
FR2009201A1 (cs) 1970-01-30

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