GB1413689A - Control vavles - Google Patents
Control vavlesInfo
- Publication number
- GB1413689A GB1413689A GB5758172A GB5758172A GB1413689A GB 1413689 A GB1413689 A GB 1413689A GB 5758172 A GB5758172 A GB 5758172A GB 5758172 A GB5758172 A GB 5758172A GB 1413689 A GB1413689 A GB 1413689A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spool
- inlet
- spools
- valves
- passage
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- 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
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
- F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
- F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple output members
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/355—Pilot pressure control
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/76—Control of force or torque of the output member
- F15B2211/763—Control of torque of the output member by means of a variable capacity motor, i.e. by a secondary control on the motor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
- Multiple-Way Valves (AREA)
Abstract
1413689 Valves CATERPILLAR TRACTOR TRACTOR CO 13 Dec 1972 [13 Dec 1971] 57581/72 Heading F2V A control valve for an excavator includes two open-centre spools 42, 44 moving in parallel bores 58, 60 interconnected by a through passage 78. The spool 42 controls flow between a first inlet passage 76, exhaust passages 64, 66 and work ports 172, 174. A second inlet passage 72 normally communicates with exhaust 88 but on operation of the spool 44 check valve 184 opens to allow the fluid from inlet 72 to combine with that from inlet 76. Spools 42, 44 are mechanically coupled to move together. Work ports 172, 174 communicate with relief valves 176, 178 and anti cavitation valves 180, 182. Two further spools 38, 40 are provided each with their own relief and anti cavitation valves and inlet, exhaust and work passages. The two further spools have separate inlets 68 and 70 and the spool 40 is pilot pressure operated. Spool 40 will use both inlet 68, 70 if spool 38 is not operative and similarly spool 42 will use all three inlets if spools 38, 40 are not operative. Spool 40 which is to control track motors is provided with a pair of pressure regulating overspeed valves 136, 138. All the spools are centred by conventional end spring mechanisms (not shown). Spool 42 may have a separate inlet of its own. In a modification Fig. 7 (not shown) the bore 60 receives two separate spools (238) (248) one (248) of which acts to combine the inlet flows and the other (238) of which acts to connect inlet passage (236) to a further spool valve inlet (244) via a check valve (242). The spool (248) and spool 42 are hydraulically or mechanically coupled or alternatively spool (248) is independently operable for when fluid is available at the second inlet (246).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20702871A | 1971-12-13 | 1971-12-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1413689A true GB1413689A (en) | 1975-11-12 |
Family
ID=22768912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5758172A Expired GB1413689A (en) | 1971-12-13 | 1972-12-13 | Control vavles |
Country Status (8)
Country | Link |
---|---|
US (1) | US3759292A (en) |
JP (2) | JPS4865382A (en) |
BE (1) | BE792618A (en) |
CA (1) | CA976839A (en) |
DE (1) | DE2261626C2 (en) |
FR (1) | FR2163536B1 (en) |
GB (1) | GB1413689A (en) |
SE (1) | SE390199B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3044171A1 (en) * | 1980-11-24 | 1982-06-16 | Linde Ag, 6200 Wiesbaden | DRIVE SYSTEM WITH AT LEAST TWO SUBSYSTEMS |
GB2141524A (en) * | 1983-06-13 | 1984-12-19 | Koehring Co | Sectional valve with independent pump and function control spools |
GB2143304A (en) * | 1983-05-31 | 1985-02-06 | Komatsu Mfg Co Ltd | Directional control valve unit |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4078681A (en) * | 1976-08-24 | 1978-03-14 | Caterpillar Tractor Co. | Dual pump hydraulic control system with predetermined flow crossover provision |
US4280397A (en) * | 1978-04-27 | 1981-07-28 | Joy Manufacturing Company | Hydraulic fluid control apparatus |
WO1980001940A1 (en) * | 1979-03-05 | 1980-09-18 | Mcwilliams O | Balanced spool valve |
JPS57120704A (en) * | 1981-01-19 | 1982-07-27 | Toshiba Mach Co Ltd | Confluent composite control valve |
JPS5880033A (en) * | 1981-11-02 | 1983-05-14 | Kobe Steel Ltd | Oil hydraulic circuit for oil hydraulic shovel |
JPH0349286Y2 (en) * | 1986-09-01 | 1991-10-22 | ||
US6397890B1 (en) * | 1999-02-15 | 2002-06-04 | Case Corp. | Variable metering fluid control valve |
ITBO20000473A1 (en) * | 2000-07-31 | 2002-01-31 | Hydrocontrol S P A | HYDRAULIC DISTRIBUTOR, TO CONTROL THE OPERATION OF A BRUSHCUTTER. |
JP5087047B2 (en) * | 2009-06-18 | 2012-11-28 | 日立建機株式会社 | Hydraulic work machine |
WO2011162179A1 (en) * | 2010-06-22 | 2011-12-29 | 日立建機株式会社 | Hydraulic control device for working vehicle |
US10024445B2 (en) * | 2014-06-25 | 2018-07-17 | Parker-Hannifin Corporation | Reverse flow check valve in hydraulic valve with series circuit |
US9387759B2 (en) | 2014-09-22 | 2016-07-12 | Caterpillar Inc. | Flow divider free wheeling valve |
JP6643913B2 (en) * | 2016-02-16 | 2020-02-12 | 株式会社クボタ | Hydraulic block |
CN111051707B (en) * | 2017-08-15 | 2023-02-28 | 丹佛斯动力系统Ii技术有限公司 | Slide valve |
US11460053B2 (en) * | 2020-03-16 | 2022-10-04 | Parker-Hannifin Corporation | Open center control valve configured to combine fluid flow received from multiple sources |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2879612A (en) * | 1956-05-02 | 1959-03-31 | Gar Wood Ind Inc | Hydraulic drive for ditcher conveyor |
US2979908A (en) * | 1960-01-04 | 1961-04-18 | Warner Swasey Co | Hydraulic control systems |
DE1159764B (en) * | 1960-06-07 | 1963-12-19 | Fritz Spierig Fa | Hydraulic control device for the operation of hydraulically operated equipment |
NL125372C (en) * | 1962-04-30 | 1900-01-01 | ||
AT246516B (en) * | 1964-07-24 | 1966-04-25 | Prerovske Strojirny Np | Hydraulic steering |
GB1045030A (en) * | 1964-09-30 | 1966-10-05 | Dowty Hydraulic Units Ltd | Fluid valves |
DE1952034A1 (en) * | 1969-10-15 | 1971-04-22 | Linde Ag | Control device for a hydraulic system and valve for this |
-
0
- BE BE792618D patent/BE792618A/en not_active IP Right Cessation
-
1971
- 1971-12-13 US US00207028A patent/US3759292A/en not_active Expired - Lifetime
-
1972
- 1972-12-06 CA CA158,167A patent/CA976839A/en not_active Expired
- 1972-12-12 JP JP47124012A patent/JPS4865382A/ja active Pending
- 1972-12-12 FR FR7244207A patent/FR2163536B1/fr not_active Expired
- 1972-12-12 SE SE7216212A patent/SE390199B/en unknown
- 1972-12-13 DE DE2261626A patent/DE2261626C2/en not_active Expired
- 1972-12-13 GB GB5758172A patent/GB1413689A/en not_active Expired
-
1980
- 1980-03-17 JP JP1980035746U patent/JPS55134505U/ja active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3044171A1 (en) * | 1980-11-24 | 1982-06-16 | Linde Ag, 6200 Wiesbaden | DRIVE SYSTEM WITH AT LEAST TWO SUBSYSTEMS |
US4461148A (en) * | 1980-11-24 | 1984-07-24 | Linde Aktiengesellschaft | Hydrostatic drive systems |
GB2143304A (en) * | 1983-05-31 | 1985-02-06 | Komatsu Mfg Co Ltd | Directional control valve unit |
GB2141524A (en) * | 1983-06-13 | 1984-12-19 | Koehring Co | Sectional valve with independent pump and function control spools |
Also Published As
Publication number | Publication date |
---|---|
SE390199B (en) | 1976-12-06 |
JPS4865382A (en) | 1973-09-08 |
FR2163536A1 (en) | 1973-07-27 |
FR2163536B1 (en) | 1978-08-04 |
DE2261626C2 (en) | 1985-08-29 |
US3759292A (en) | 1973-09-18 |
BE792618A (en) | 1973-06-12 |
CA976839A (en) | 1975-10-28 |
JPS55134505U (en) | 1980-09-24 |
DE2261626A1 (en) | 1973-06-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |