GB1422273A - Hydraulic control valves - Google Patents
Hydraulic control valvesInfo
- Publication number
- GB1422273A GB1422273A GB1392173A GB1392173A GB1422273A GB 1422273 A GB1422273 A GB 1422273A GB 1392173 A GB1392173 A GB 1392173A GB 1392173 A GB1392173 A GB 1392173A GB 1422273 A GB1422273 A GB 1422273A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spool
- port
- line
- control
- pressure
- 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
- E02F9/2004—Control mechanisms, e.g. control levers
-
- 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
- E02F9/2285—Pilot-operated systems
-
- 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
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
-
- 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
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/86582—Pilot-actuated
- Y10T137/86606—Common to plural valve motor chambers
-
- 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
- Y10T137/87177—With bypass
- Y10T137/87185—Controlled by supply or exhaust valve
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Servomotors (AREA)
- Multiple-Way Valves (AREA)
- Fluid-Driven Valves (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Abstract
1422273 Fluid-pressure control systems CATERPILLAR TRACTOR CO 22 March 1973 [23 March 1972] 13921/73 Heading G3P [Also in Division F2] A pilot valve 10 comprises a housing 12 in which are reciprocally mounted identical spools 16, 16 having passages to control the flow of positioning liquid through lines 74, 76 to the main valve 72 of a servomotor. The spool 16 has a central land 36 in alignment with an inlet passage 18 from pump 20. Slight axial movement, say to the right, of spool 16 from its neutral position causes liquid to flow from inlet 18 into a transverse spool slot 50 and thence through axial port 46 into annular groove 32 in communication with line 74. A leak-off from groove 32 to drain 22 via a port 58 in land 42 ensures that the pressure in line 74 is less than in inlet 18. The control spool 82 of main valve 72 is thus caused to move rapidly to the right, through its dead band range, against the action of a low rate centering spring until contact is made with a high rate spring. Further rightwards movement of pilot spool 16 places an axial, variable section, slot 54 in parallel with the now fully effective port 46 so as to increase the control pressure in line 74. A further rapid increase in the latter occurs when spool 16 has moved to such extent that leak-off port 58 is blocked. Fig. 3 (not shown) illustrates the relationship between spool travel and control pressure spool 16 includes an identical set of ports &c. on the opposite side of central land 36 to control pressure in line 76, a dowel 66 to prevent rotation of the spool, and biasing springs 70.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23725572A | 1972-03-23 | 1972-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1422273A true GB1422273A (en) | 1976-01-21 |
Family
ID=22892955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1392173A Expired GB1422273A (en) | 1972-03-23 | 1973-03-22 | Hydraulic control valves |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3771564A (en) |
| JP (1) | JPS5911794B2 (en) |
| BE (1) | BE796701A (en) |
| BR (1) | BR7302110D0 (en) |
| CA (1) | CA987570A (en) |
| DE (1) | DE2313300A1 (en) |
| FR (1) | FR2176939B1 (en) |
| GB (1) | GB1422273A (en) |
| IN (1) | IN138717B (en) |
| IT (1) | IT979935B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3995532A (en) * | 1974-07-15 | 1976-12-07 | Caterpillar Tractor Co. | Proportional control valve with preconditioned inlet modulating relief valve |
| US4011892A (en) * | 1975-03-14 | 1977-03-15 | Marotta Scientific Controls, Inc. | Three port non-interflow poppet valve |
| GB1510418A (en) * | 1976-03-08 | 1978-05-10 | Caterpillar Tractor Co | Fluid control valve |
| US4133510A (en) * | 1977-02-09 | 1979-01-09 | Caterpillar Tractor Co. | Valve spool positioner |
| US4199293A (en) * | 1977-03-07 | 1980-04-22 | Caterpillar Tractor Co. | High pressure implement circuit for loader with slow and fast dump position |
| US4265273A (en) * | 1978-12-07 | 1981-05-05 | Caterpillar Tractor Co. | High pressure implement circuit for loader with slow and fast dump position |
| US4238112A (en) * | 1978-12-22 | 1980-12-09 | Rexnord Inc. | Spool spin prevention for hydraulic control valves |
| GB2112506A (en) * | 1981-12-30 | 1983-07-20 | Shell Int Research | Distributing valve |
| DE3200476A1 (en) * | 1982-01-09 | 1983-07-21 | Flutec Fluidtechnische Geräte GmbH, 6603 Sulzbach | Valve for the alternative connection of a consumer to a pressure-medium source or a supply tank |
| US4709724A (en) * | 1986-01-17 | 1987-12-01 | Commercial Shearing, Inc. | Fluid valve structures |
| DE3737392A1 (en) * | 1987-11-04 | 1989-05-24 | Bosch Gmbh Robert | HYDRAULIC CONTROL VALVE |
| DE102004048683B4 (en) * | 2004-10-06 | 2012-12-13 | Bosch Rexroth Aktiengesellschaft | Valve |
| DE102007054137A1 (en) * | 2007-11-14 | 2009-05-28 | Hydac Filtertechnik Gmbh | Hydraulic valve device |
| US20160201296A1 (en) * | 2016-03-24 | 2016-07-14 | Caterpillar Inc. | Hydraulic valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3160174A (en) * | 1961-03-28 | 1964-12-08 | Parker Hannifin Corp | Remote power shift circuits for spool valves and the like |
| US3447567A (en) * | 1968-02-07 | 1969-06-03 | Koehring Co | Pilot governed control valve mechanism |
-
1972
- 1972-03-23 US US00237255A patent/US3771564A/en not_active Expired - Lifetime
-
1973
- 1973-01-26 CA CA162,214A patent/CA987570A/en not_active Expired
- 1973-01-30 IN IN217/CAL/73A patent/IN138717B/en unknown
- 1973-03-13 BE BE128733A patent/BE796701A/en not_active IP Right Cessation
- 1973-03-14 DE DE2313300A patent/DE2313300A1/en not_active Withdrawn
- 1973-03-20 JP JP48031500A patent/JPS5911794B2/en not_active Expired
- 1973-03-20 FR FR7309919A patent/FR2176939B1/fr not_active Expired
- 1973-03-21 IT IT48935/73A patent/IT979935B/en active
- 1973-03-22 GB GB1392173A patent/GB1422273A/en not_active Expired
- 1973-03-23 BR BR732110A patent/BR7302110D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT979935B (en) | 1974-09-30 |
| DE2313300A1 (en) | 1973-10-04 |
| CA987570A (en) | 1976-04-20 |
| IN138717B (en) | 1976-03-20 |
| JPS5911794B2 (en) | 1984-03-17 |
| FR2176939A1 (en) | 1973-11-02 |
| JPS4913726A (en) | 1974-02-06 |
| BR7302110D0 (en) | 1974-06-27 |
| FR2176939B1 (en) | 1978-07-13 |
| US3771564A (en) | 1973-11-13 |
| BE796701A (en) | 1973-09-13 |
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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) | ||
| PE20 | Patent expired after termination of 20 years |
Effective date: 19930321 |