US3884253A - Hydraulic control valve - Google Patents
Hydraulic control valve Download PDFInfo
- Publication number
- US3884253A US3884253A US31930672A US3884253A US 3884253 A US3884253 A US 3884253A US 31930672 A US31930672 A US 31930672A US 3884253 A US3884253 A US 3884253A
- Authority
- US
- United States
- Prior art keywords
- fluid flow
- valve
- valve chamber
- pilot
- flow path
- 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
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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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0832—Modular valves
- F15B13/0839—Stacked plate type valves
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- 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
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2559—Self-controlled branched flow systems
- Y10T137/2562—Dividing and recombining
-
- 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
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7781—With separate connected fluid reactor surface
- Y10T137/7784—Responsive to change in rate of fluid flow
- Y10T137/7787—Expansible chamber subject to differential pressures
- Y10T137/7788—Pressures across fixed choke
Definitions
- FIG.8 FATENTED HAY 2 01975 SHEET ESBF 4O FIG.8
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
Abstract
A hydraulic control valve is provided which can amplify the pilot flow controlled a pilot valve coupled to the control valve. Orifices are inserted into the pilot and main flows so that the pressure difference or drop across these orifices may be transmitted across a spool in order to control the main flow in proportion to the pilot flow which in turn is controlled by the pilot valve.
Description
United States Patent 1 1 Murata et a1.
1 1 3,884,253 1451 May 20, 1975 1 HYDRAULIC CONTROL VALVE [75] Inventors: Hikaru Murata; Yasuji Umeda;
Yasusada Sakurai; Yasuo Doi, all of Kamo, Japan [73] Assignee: Kayabakogyokabushikikaisha,
Tokyo. Japan [22] Filed: Dec. 29, 1972 [21] App]. No.: 319.306
[30] Foreign Application Priority Data Dec. 29. 1971 Japan 46-32331 Feb. 18. 1972 Japan 47-16452 Feb. 26. 1972 Japan 47-20021 [52] US. Cl ..l37/ll0; 91/443; 137/501 [51] Int. Cl. G05d 7/01 [58] Fie1dofSearch...91/447;137/84; 110; 116; 102; 137/486; 489; 501; 503; 625.6
[56] References Cited UNITED STATES PATENTS 2.053.330 9/1936 Fitch 137/110 2.495.785 1/1950 Stephens 91/447 X 2.665.704 l/1954 Kanuch................. 137/110 2.893.415 7/1959 Arcnhoid et a1 137/102 X 2.990.847 7/1961 Absalom 137/489 3.266.380 8/1966 Eige 137/84 X 3.470.896 10/1969 Werter.... 137/110 3.587.619 6/1971 Krechel 137/1 16 Primary Examiner-Robert G. Niison Attorney, Agent. or Firm-Saul Jecies 13 Claims, 63 Drawing Figures PATENTEU mzoms 3, 884.253
sum {1 SF 40 PATENIED umzoms SHEET [23F 40 FIG.4
PATENTED W20 I975 3. 884, 25 3 SHEET 133mm FIG.5
Ill/A? FIG-7 FATENTED HAY 2 01975 SHEET ESBF 4O FIG.8
PATENTED 884. 253
SHEET 07 0F 40 FlG.9
PATENTEI] HMZOIBTS FIG. l3
PATENTEU W20975 884,253 SHEET 13GF 10 PATENTEUHAYZUEYS 3. 884, 253
SHEET mar 40 PATENTEU 3.884.253
SHEET 1s BF 40 FIG. l8
PATENTEI] MAY 2 01975 SHEET 17UF 1O FIG. 2|
Claims (13)
1. A hydraulic control valve, comprising a valve body having an elongated chamber, a main flow input port and a main flow output port which both communicate with said chamber; a valve spool having a hollow interior which communicates with said chamber at one axial end of said spool, and a circumferential wall provided with an opening which communicates with said hollow interior, said spool being axially slidable in said chamber between a normal position in which said opening is out of communication with both of said ports, and two operated positions in each of which said opening is in communication with a respective one of said ports; an external port formed in said valve body and communicating with said chamber adjacent said one axial end of said spool; a pilot flow passage in said valve body, bypassing Said chamber and having one open end communicating with the exterior of said valve body and another open end communicating with said external port; orifice means interposed in said pilot flow passage intermediate said one end and said other end thereof; and aperture means communicating with said chamber adjacent the other end of said valve spool, and with said pilot flow passage intermediate said orifice means and said one end, so that a pressure difference which develops in said pilot flow passage across said orifice means acts upon said ends of said valve spool.
2. A control valve as defined in claim 1, wherein said input and output ports are used as common input and output ports; and further comprising an additional valve spool, pilot flow passage, orifice means and external port similar to the previously mentioned ones and also disposed in said control valve, whereby a pair of control valve units are incorporated in said control valve.
3. A control valve as defined in claim 2, further comprising additional orifice means interposed between said input and output ports.
4. A control valve as defined in claim 3, wherein some or all of said orifice means may have their cross-sectional areas varied by operation from the exterior of said control valve.
5. A control valve comprising a valve body; an internal passage in said valve body and having opposite end portions; an external input port and an external output port formed in said valve body and each communicating with said internal passage; a pilot port formed in said valve body and communicating with said passage; spool means having opposite axial ends and being shiftable in said internal passage intermediate said end portions between a normal position in which it prevents communication between said external ports, and two operated positions in which it communicates a respective one of said external ports with said pilot port; a pilot flow passage formed in said valve body and bypassing said internal passage and said spool means, said pilot flow passage communicating with said opposite end portions adjacent said opposite axial ends of said spool means, said pilot flow passage having an inlet for a pilot flow at the exterior of said valve body; and orifice means interposed in said pilot flow passage so that a pressure difference may delvelop across said orifice means and is transmitted to said opposite axial ends of said spool means.
6. A hydraulic control valve, comprising a valve body having a cylindrical valve chamber; port means communicating with said valve chamber and defining two paths for a main fluid flow which pass through said valve chamber and through one end thereof; a hollow valve spool received in said valve chamber and slidable therein between positions in which it completes and interrupts said main fluid flow paths; a passage defining a pilot fluid flow path which bypasses said valve chamber; restricted orifice means interposed in said pilot fluid flow path; restricted orifice means in said main fluid flow paths located at said one end of said valve chamber; and conduit means for joining the fluid flow of said pilot fluid flow and the fluid flow of said main fluid flow adjacent said restricted orifice means for said main fluid flow paths, for controlling the displacement of said valve spool and the volumetric flow of fluid in the main fluid flow paths as a function of the difference between the pressure drops which occur in the fluid flows across said restricted orifice means.
7. A hydraulic control valve, comprising a valve body having a cylindrical valve chamber; ports means communicating with said valve chamber and defining two paths for a main fluid flow which pass alternately in opposite directions through said valve chamber and through one end thereof; a hollow valve spool received in said valve chamber and slidable therein between positions in which it completes and interrupts said main fluid flow paths; a passage defining a pilot fluid flow path which bypasses said valve chamber; restricted orifice means interposed in said pilot fluid flow path; restricted orifice means in said main fluid flow paths located at said one end of said valve chamber; and conduit means for joining the fluid flow of said pilot fluid flow and the fluid flow of said main fluid flow adjacent said restricted orifice means for said main fluid flow paths, for controlling the displacement of said valve spool and the volumetric flow of fluid in the main fluid flow paths as a function of the difference between the pressure drops which occur in the fluid flows across said restricted orifice means.
8. A hydraulic control valve, comprising a valve body having a cylindrical valve chamber; port means communicating with said valve chamber and defining a main fluid flow path which passes through said valve chamber and through one end thereof; a hollow valve spool received in said valve chamber and slidable therein between positions in which it completes and interrupts said main fluid flow path; passage means in said valve body, bypassing said valve chamber and defining a pilot flow path which communicates with said main flow path in the region of said one end of said valve chamber; a first restricted orifice in said main flow path at said one end of said valve chamber, intermediate the latter and said pilot flow path; a second, damper orifice communicating the other end of said valve chamber with said pilot flow passage; and a third orifice in said pilot flow path intermediate said damper orifice and said main flow path.
9. A hydraulic control valve, comprising a valve body having a cylindrical valve chamber; port means including a first and a second exterior port, and a third port which communicates with said valve chamber, said first and second ports defining a first path for a first main fluid flow, and said first and third ports defining a second path for a main fluid flow which passes through said valve chamber and through one end thereof; a hollow valve spool received in said valve chamber and slidable therein between positions in which it completes and interrupts said second main fluid flow path; a passage defining a pilot fluid flow path which bypasses said valve chamber; first restricted orifice means interposed in said pilot fluid flow path; second restricted orifice means in said second main fluid flow path located at said one end of said valve chamber; and conduit means for joining the fluid flow of said pilot fluid flow and the fluid flows of both of said main fluid flows adjacent said second restricted orifice means, for controlling the displacement of said valve spool and the volumetric flow of fluid in the main fluid flow paths as a function of the difference between the pressure drops which occur in the fluid flows across said restricted orifice means.
10. A hydraulic control valve, comprising a valve body having a cylindrical valve chamber; port means including a first and a second port which communicate with one another to form a first main fluid flow path, a third and fourth port both communicating via said valve chamber with said first port and defining second and third main fluid flow paths which pass through said valve chamber and through one end thereof; a hollow valve spool received in said valve chamber and having a pair of axially spaced apertures in its circumference, said valve spool being slidable in said valve chamber between a position in which communication between said apertures and said third and fourth ports is interrupted, a position in which one of said apertures communicates with said third port, and a position in which the other of said apertures communicates with said fourth port; a passage defining a pilot fluid flow path which bypasses said valve chamber; first restricted orifice means interposed in said pilot fluid flow path; second restricted orifice means in said second and third main fluid flow paths located at said one end of said valve chamber; and conduit means for joining the fluid flow of said pilot fluid flow and the fluid flows of all of said main fluid flows adjacent said restricted orifice means for said second and third main fluid flow paths, for controlling the the displacement of said valve spool and the volumetric flow of fluid in the main fluid flow paths as a function of the difference between the pressure drops which occur in the fluid flows across said restricted orifice means.
11. A hydraulic control valve, caomprising a valve body having a cylindrical valve chamber; a single port communicating with said valve chamber and defining a path for a main fluid flow which passes through said valve chamber and through one end thereof; a hollow valve spool received in said valve chamber and having a circumferential wall formed with an opening, said valve spool being slidable in said valve chamber between a position in which said opening communicates with said port, and another position in which said opening is out of communication with said port; biasing means biasing said valve spool to said other position; a passage defining a pilot fluid flow path which bypasses said valve chamber; restricted orifice means interposed in said pilot fluid flow path; restricted orifice means in said main fluid flow path located at said one end of said valve chamber; and conduit means for joining the fluid flow of said pilot fluid flow and the fluid flow of said main fluid flow adjacent said restricted orifice means for said main fluid flow path, for controlling the displacement of said valve spool against the force of said biasing means and the volumetric flow of fluid in the main fluid flow path as a function of the difference between the pressure drops which occur in the fluid flow across said restricted orifice means.
12. A hydraulic control valve, comprising a valve body having a cylindrical valve chamber; port means including a pair of axially spaced ports communicating with said valve chamber and defining two paths for main fluid flows which pass through said valve chamber and through one end thereof; a hollow valve spool received in said valve chamber and having a circumferential wall formed with a pair of axially spaced openings, said valve spool being slidable in said valve chamber between a position in which said openings are both out of communication with said ports, and positions in which respective ones of said openings communicate with the respective ports; a passage defining a pilot fluid flow path which bypasses said valve chamber but communicates with one of said ports; restricted orifice means interposed in said pilot fluid flow path; restricted orifice means in said main fluid flow path located at said one end of said valve chamber; and conduit means for joining the fluid flow of said pilot fluid flow and the fluid flows of said main fluid flows adjacent said restricted orifice means for said main fluid flow paths, for controlling the displacement of said valve spool and the volumetric flow of fluid in the main fluid flow paths as a function of the difference between the pressure drops which occur in the fluid flows across said restricted orifice means.
13. A hydraulic control valve, comprising a valve body having a cylindrical valve chamber; port means communicating with said valve chamber and defining a path for a main fluid flow which passes through said valve chamber and through one end thereof; a hollow valve spool received in said valve chamber and slidable therein between positions in which it completes and interrupts said main fluid flow path; a passage defining a pilot fluid flow path which bypasses said valve chamber; restricted orifice means interposed in said pilot fluid flow path; restricted orifice means in said main fluid flow path locatEd at said one end of said valve chamber; and conduit means for joining the fluid flow of said pilot fluid flow and the fluid flow of said main fluid flow adjacent said restricted orifice means for said main fluid flow path, for controlling the displacement of said valve spool and the volumetric flow of fluid in the main fluid flow path as a function of the difference between the pressure drops which occur in the fluid flows across said restricted orifice means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/526,696 US3942548A (en) | 1972-12-29 | 1974-11-25 | Fluid control valve |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3233171 | 1971-12-29 | ||
| JP1645272A JPS5838642B2 (en) | 1972-02-18 | 1972-02-18 | Seigiyo Ben Sochi |
| JP2002172A JPS554985B2 (en) | 1972-02-26 | 1972-02-26 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05/526,696 Continuation-In-Part US3942548A (en) | 1972-12-29 | 1974-11-25 | Fluid control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3884253A true US3884253A (en) | 1975-05-20 |
Family
ID=27281416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US05319306 Expired - Lifetime US3884253A (en) | 1971-12-29 | 1972-12-29 | Hydraulic control valve |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3884253A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4041836A (en) * | 1974-05-08 | 1977-08-16 | Hikaru Murata | Open circuit type acceleration/deceleration device |
| US4112822A (en) * | 1975-06-06 | 1978-09-12 | Kayabakogyokabushikikaisha | Pressure responsive sequencing device |
| US5156177A (en) * | 1990-10-24 | 1992-10-20 | Woodward Governor Company | Flow loading unloader valve |
| US20190024811A1 (en) * | 2016-01-28 | 2019-01-24 | Kyb Corporation | Pilot type switching valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2053330A (en) * | 1933-04-17 | 1936-09-08 | Auburn Foundry | Control for fluid power plants |
| US2495785A (en) * | 1945-01-11 | 1950-01-31 | Hydraulic Equipment Company | Lowering valve |
| US2665704A (en) * | 1948-03-26 | 1954-01-12 | Borg Warner | Constant speed flow control valve |
| US2893415A (en) * | 1956-04-13 | 1959-07-07 | Westinghouse Bremsen Gmbh | Self-lapping relay valve device |
| US2990847A (en) * | 1959-05-25 | 1961-07-04 | Marquardt Corp | Fluid flow regulator |
| US3266380A (en) * | 1963-11-26 | 1966-08-16 | Stanford Research Inst | Pneumatic operational amplifier system |
| US3470896A (en) * | 1965-01-07 | 1969-10-07 | Jay P Au Werter | Parallel line fluid system with meter regulating valve |
| US3587619A (en) * | 1969-10-24 | 1971-06-28 | Joseph L Krechel | Compressor unloader and check valve unit |
-
1972
- 1972-12-29 US US05319306 patent/US3884253A/en not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2053330A (en) * | 1933-04-17 | 1936-09-08 | Auburn Foundry | Control for fluid power plants |
| US2495785A (en) * | 1945-01-11 | 1950-01-31 | Hydraulic Equipment Company | Lowering valve |
| US2665704A (en) * | 1948-03-26 | 1954-01-12 | Borg Warner | Constant speed flow control valve |
| US2893415A (en) * | 1956-04-13 | 1959-07-07 | Westinghouse Bremsen Gmbh | Self-lapping relay valve device |
| US2990847A (en) * | 1959-05-25 | 1961-07-04 | Marquardt Corp | Fluid flow regulator |
| US3266380A (en) * | 1963-11-26 | 1966-08-16 | Stanford Research Inst | Pneumatic operational amplifier system |
| US3470896A (en) * | 1965-01-07 | 1969-10-07 | Jay P Au Werter | Parallel line fluid system with meter regulating valve |
| US3587619A (en) * | 1969-10-24 | 1971-06-28 | Joseph L Krechel | Compressor unloader and check valve unit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4041836A (en) * | 1974-05-08 | 1977-08-16 | Hikaru Murata | Open circuit type acceleration/deceleration device |
| US4112822A (en) * | 1975-06-06 | 1978-09-12 | Kayabakogyokabushikikaisha | Pressure responsive sequencing device |
| US5156177A (en) * | 1990-10-24 | 1992-10-20 | Woodward Governor Company | Flow loading unloader valve |
| US20190024811A1 (en) * | 2016-01-28 | 2019-01-24 | Kyb Corporation | Pilot type switching valve |
| US10619753B2 (en) * | 2016-01-28 | 2020-04-14 | Kyb Corporation | Pilot type switching valve |
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