US3285284A - Hydraulic valve neutralizer - Google Patents

Hydraulic valve neutralizer Download PDF

Info

Publication number
US3285284A
US3285284A US396985A US39698564A US3285284A US 3285284 A US3285284 A US 3285284A US 396985 A US396985 A US 396985A US 39698564 A US39698564 A US 39698564A US 3285284 A US3285284 A US 3285284A
Authority
US
United States
Prior art keywords
valve
spool
piston
neutralizer
jack
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
US396985A
Inventor
John A Junck
Kokaly Joseph
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
Priority to US396985A priority Critical patent/US3285284A/en
Priority to GB36379/65A priority patent/GB1062143A/en
Priority to DE19651475967 priority patent/DE1475967A1/en
Application granted granted Critical
Publication of US3285284A publication Critical patent/US3285284A/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
    • 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
    • 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
    • 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
    • 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
    • Y10T137/86485—Line condition change responsive release of valve

Definitions

  • valve kickout mechanisms have been devised to close or neutralize the valve automatically when the function of a component is completed.
  • a valve is provided to direct fluid to the jack for returning an ejector after it has discharged a load of earth from the bowl. If this valve is held open by a detent and automatically closed when the ejector is returned, the operators attention may be devoted to apron and bowl control and to driving of the machine itself during the time that the ejector is being returned.
  • the present invention is directed and it is the object of the present invention to provide a very simple and positive acting valve neutralizer that is contained entirely within the valve housing and utilizes a minimum of moving parts.
  • the drawing is a schematic view of a hydraulic circuit for a jack and including a control valve embodying the present invention shown in section.
  • a pump shown at in the drawing withdraws hydraulic fluid from a reservoir 11 and directs it through a line 12 and valve generally indicated at 13 to a hydrulic jack 14.
  • the valve contains a spool 15 adjustable to different positions by means of a lever 16 and normally held in the neutral position shown in the drawing by a conventional centering spring 17. In the position shown, fluid from the pump passes freely through the valve to a discharge chamber 18 and back to the reservoir by way of a conduit 19. Movement of the valve spool 15 toward the right from the neutral position shown closes the return passage and opens communication through a line 20 with the head end of the jack 14 causing extension of its piston rod 21.
  • valve spool Upon adjustment of the valve spool to the left in the position shown, fluid under pressure is directed through a line 22 to the rod end of the jack thus retracting the piston rod.
  • the jack is one which operates the ejector of an earthmoving scraper, it is the retraction of the rod 21 which would cause return of the ejector to its normal position after it has been employed to eject a load.
  • the valve spool be retained as by detent mechanism until the piston of the jack reaches the end of its stroke so that once an operator has positioned the valve to cause return of the ejector he can disregard the ejector valve and give his full attention to other operations.
  • a detent for holding the valve spool in its leftward position which effects retraction of the piston rod 21 is illustrated as a pair of spring biased pins 24 engaging the spool and adapted to ride over an enlargement 25 which encircles the spool and retains the spool in its shifted position against the biasing effect of the spring 17 which tends to return it to neutral.
  • the present invention provides means to overcome the effect of the detent mechanism by urging the spool back toward the neutral position with a force which increases due to a rise in pressure when the piston has reached the end of its travel in the jack.
  • an elongated pin or piston 26 is slidably fitted in a bore at one end of the spool.
  • a longitudinal passage 27 and a communicating transverse passage 28 both formed in the spool connect the bore in which piston 26 is fitted with the discharge line to the reservoir when the valve is in the neutral position shown. However when the valve is shifted toward the left to direct fluid to the rod end of the jack this bore communicates with pump pressure as it exists in the line 22 and in the valve housing.
  • a spool valve having resilient detent mechanism for holding the spool in an open position, means to effect release of said detent when the pressure in the valve exceeds a predetermined value, comprising an axial passageway in said spool extending inwardly from one end of the spool to a point adjacent the other end of the spool, a valve housing enclosing said one end, the portion of said passageway adjacent said one end being enlarged and slidably receiving a piston therein, said passageway at said point being joined by aradial passageway which is in communication with fluid under pressure only when the valve is in open position, an opening in said housing in alignment with said piston and a removable plug closing said opening, said resilient detent mechanism being at said other end of the spool and a lever for operating the valve being at said one end of said spool, said slidable piston being arranged to project from one end of said spool into engagement with said plug to effect release of said detent when pressure is communicated to the end of the piston in the spool,

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Mechanically-Actuated Valves (AREA)

Description

5, 1966 J. A. JUNCK ETAL HYDRAULIC VALVE NEUTRALIZER Filed Sept. 16, 1964 RESERVOIR INVENTORS JOHN A. JUNCK BY JOSEPH KOKALY W ATTORNEYS United States Patent 3,285,284 HYDRAULHC VALVE NEUTRALIZER John A. lunch and Joseph Kolraly, Juliet, 111., assignors to Caterpillar Tractor (30., Peoria, 111., a corporation of California Filed Sept. 16, 1964, Ser. No. 396,985 1 Claim. (Cl. 137-62427) This invention relates to means for causing a hydraulic valve to move to an off or neutral position when work done by the pressure of fluid flowing through the valve is accomplished.
Many types of earthmoving machines have numerous components actuated by hydraulic motors and operating conditions sometimes tax the ability of an operator to adjust all necessary components at one time. For this reason various so-called valve kickout mechanisms have been devised to close or neutralize the valve automatically when the function of a component is completed. For example on an earthmoving scraper, a valve is provided to direct fluid to the jack for returning an ejector after it has discharged a load of earth from the bowl. If this valve is held open by a detent and automatically closed when the ejector is returned, the operators attention may be devoted to apron and bowl control and to driving of the machine itself during the time that the ejector is being returned.
It is to such automatic valve operation that the present invention is directed and it is the object of the present invention to provide a very simple and positive acting valve neutralizer that is contained entirely within the valve housing and utilizes a minimum of moving parts.
Further and more specific objects and advantages of the invention are made apparent in the following specification wherein reference is made to the accompanying drawing.
The drawing is a schematic view of a hydraulic circuit for a jack and including a control valve embodying the present invention shown in section.
A pump shown at in the drawing withdraws hydraulic fluid from a reservoir 11 and directs it through a line 12 and valve generally indicated at 13 to a hydrulic jack 14. The valve contains a spool 15 adjustable to different positions by means of a lever 16 and normally held in the neutral position shown in the drawing by a conventional centering spring 17. In the position shown, fluid from the pump passes freely through the valve to a discharge chamber 18 and back to the reservoir by way of a conduit 19. Movement of the valve spool 15 toward the right from the neutral position shown closes the return passage and opens communication through a line 20 with the head end of the jack 14 causing extension of its piston rod 21. Upon adjustment of the valve spool to the left in the position shown, fluid under pressure is directed through a line 22 to the rod end of the jack thus retracting the piston rod. Assuming that the jack is one which operates the ejector of an earthmoving scraper, it is the retraction of the rod 21 which would cause return of the ejector to its normal position after it has been employed to eject a load. In this case, it is desirable that the valve spool be retained as by detent mechanism until the piston of the jack reaches the end of its stroke so that once an operator has positioned the valve to cause return of the ejector he can disregard the ejector valve and give his full attention to other operations.
ice
A detent for holding the valve spool in its leftward position which effects retraction of the piston rod 21 is illustrated as a pair of spring biased pins 24 engaging the spool and adapted to ride over an enlargement 25 which encircles the spool and retains the spool in its shifted position against the biasing effect of the spring 17 which tends to return it to neutral. The present invention provides means to overcome the effect of the detent mechanism by urging the spool back toward the neutral position with a force which increases due to a rise in pressure when the piston has reached the end of its travel in the jack. To accomplish this, an elongated pin or piston 26 is slidably fitted in a bore at one end of the spool. A longitudinal passage 27 and a communicating transverse passage 28 both formed in the spool connect the bore in which piston 26 is fitted with the discharge line to the reservoir when the valve is in the neutral position shown. However when the valve is shifted toward the left to direct fluid to the rod end of the jack this bore communicates with pump pressure as it exists in the line 22 and in the valve housing. When the piston of the jack 14 reaches the end of its stroke, a sudden pressure rise takes place in line 22 and this is communicated through passages 28 and 27 to the bore of piston 26 and since this piston is stopped by the housing or by a plug shown at 28 in the housing, a force caused by this sudden pressure rise moves the valve spool toward the right overcoming the holding effect of the detent mechanism and permitting the spring 17 to center or neutralize the spool.
What is claimed is:
In a spool valve having resilient detent mechanism for holding the spool in an open position, means to effect release of said detent when the pressure in the valve exceeds a predetermined value, comprising an axial passageway in said spool extending inwardly from one end of the spool to a point adjacent the other end of the spool, a valve housing enclosing said one end, the portion of said passageway adjacent said one end being enlarged and slidably receiving a piston therein, said passageway at said point being joined by aradial passageway which is in communication with fluid under pressure only when the valve is in open position, an opening in said housing in alignment with said piston and a removable plug closing said opening, said resilient detent mechanism being at said other end of the spool and a lever for operating the valve being at said one end of said spool, said slidable piston being arranged to project from one end of said spool into engagement with said plug to effect release of said detent when pressure is communicated to the end of the piston in the spool, said valve controlling the flow of fluid to a piston operated device, and the pressure for releasing the detent is communicated from the device when the piston thereof reaches the end of its stroke and pressure builds up as a result thereof.
References Cited by the Examiner UNITED STATES PATENTS 2,729,233 1/ 1956 Garmager 137494 2,862,518 12/1958 McAlvay 137624.27 3,115,716 12/1963 Hein et al. 137624.27 XR M. CARY NELSON, Primary Examiner. MARTIN P. SCHWADRON, R. I. MILLER, Examiners.
US396985A 1964-09-16 1964-09-16 Hydraulic valve neutralizer Expired - Lifetime US3285284A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US396985A US3285284A (en) 1964-09-16 1964-09-16 Hydraulic valve neutralizer
GB36379/65A GB1062143A (en) 1964-09-16 1965-08-24 Hydraulic control valve
DE19651475967 DE1475967A1 (en) 1964-09-16 1965-09-15 Neutralizing device for a hydraulic valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US396985A US3285284A (en) 1964-09-16 1964-09-16 Hydraulic valve neutralizer

Publications (1)

Publication Number Publication Date
US3285284A true US3285284A (en) 1966-11-15

Family

ID=23569423

Family Applications (1)

Application Number Title Priority Date Filing Date
US396985A Expired - Lifetime US3285284A (en) 1964-09-16 1964-09-16 Hydraulic valve neutralizer

Country Status (3)

Country Link
US (1) US3285284A (en)
DE (1) DE1475967A1 (en)
GB (1) GB1062143A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735781A (en) * 1971-11-09 1973-05-29 Int Basic Economy Corp Valve unit
US3986701A (en) * 1975-01-06 1976-10-19 Caterpillar Tractor Co. Spade-like detent for hydraulic control valve
US4509407A (en) * 1982-06-15 1985-04-09 Vereinigte Flugtechnische Werke Gmbh Hydraulic control valve with maintenance-facilitating feature
US4796860A (en) * 1987-10-16 1989-01-10 Eaton Corporation Valve spool detent
US11098805B1 (en) * 2020-05-13 2021-08-24 The Boeing Company Shuttle valve with detent mechanism

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125482A1 (en) * 1981-06-29 1983-01-13 Günter Till Präzisionsmechanik, 3330 Helmstedt Control valve
AT389970B (en) * 1983-10-28 1990-02-26 Oleomeccanica Scaligera Spa Hydraulic valve distributor, in particular for actuating devices for turning ploughs having a double ploughshare
DE3815396A1 (en) * 1988-05-05 1989-11-16 Hartwig Straub 3-WAY VALVE

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729233A (en) * 1950-08-03 1956-01-03 Ford Motor Co Hydraulic relief valve
US2862518A (en) * 1956-03-23 1958-12-02 Webster Electric Co Inc Directional flow control valve
US3115716A (en) * 1961-11-24 1963-12-31 Caterpillar Tractor Co Hydraulic circuit for tractor drawn scrapers and the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729233A (en) * 1950-08-03 1956-01-03 Ford Motor Co Hydraulic relief valve
US2862518A (en) * 1956-03-23 1958-12-02 Webster Electric Co Inc Directional flow control valve
US3115716A (en) * 1961-11-24 1963-12-31 Caterpillar Tractor Co Hydraulic circuit for tractor drawn scrapers and the like

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735781A (en) * 1971-11-09 1973-05-29 Int Basic Economy Corp Valve unit
US3986701A (en) * 1975-01-06 1976-10-19 Caterpillar Tractor Co. Spade-like detent for hydraulic control valve
US4509407A (en) * 1982-06-15 1985-04-09 Vereinigte Flugtechnische Werke Gmbh Hydraulic control valve with maintenance-facilitating feature
US4796860A (en) * 1987-10-16 1989-01-10 Eaton Corporation Valve spool detent
US11098805B1 (en) * 2020-05-13 2021-08-24 The Boeing Company Shuttle valve with detent mechanism

Also Published As

Publication number Publication date
DE1475967A1 (en) 1969-06-04
GB1062143A (en) 1967-03-15

Similar Documents

Publication Publication Date Title
US2649688A (en) Feed control for hydraulic motors
US2946144A (en) Hydraulic control system
US2902007A (en) Cylinder piston assembly with pressure relieving means
US2985147A (en) Hydraulic valve
US3285284A (en) Hydraulic valve neutralizer
DE2513919C2 (en) Pressure compensated hydraulic circuit
US3263574A (en) Speed and directional control valve for double acting lift cylinder
US3906840A (en) Hydraulic control system for load supporting hydraulic motors
US3511133A (en) Position control for hydraulic jacks
GB1029470A (en) Fluid flow control valve
KR101474782B1 (en) Neutral Valve for HST
US3596566A (en) Hydraulic valve
US3213874A (en) Pressure responsive flow control valve for directional control valve
US3506031A (en) Relief-makeup check assembly for directional control valves
US3707984A (en) Hydraulic valve with leakage control
US4006667A (en) Hydraulic control system for load supporting hydraulic motors
US3258926A (en) Hydraulic control circuit for selfloading scrapers
US3448685A (en) Quick drop valve for bulldozer blade hydraulic controls
IL51009A (en) Servoactuator
US3132668A (en) Detent release for flow control valves
US2954052A (en) Pressure fluid control system and valve
US3002498A (en) Selector valve
US3746040A (en) Directional control valve
US3751190A (en) Self regulating fluid pump
GB1366669A (en) Fluid flow controlling device for reversible fluid motors