GB1443799A - Valve assembly - Google Patents
Valve assemblyInfo
- Publication number
- GB1443799A GB1443799A GB4734073A GB4734073A GB1443799A GB 1443799 A GB1443799 A GB 1443799A GB 4734073 A GB4734073 A GB 4734073A GB 4734073 A GB4734073 A GB 4734073A GB 1443799 A GB1443799 A GB 1443799A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- valve
- switch
- line
- motor
- 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
-
- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4043—Control of a bypass valve
-
- 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
- F16H—GEARING
- F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
- F16H39/02—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motors at a distance from liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
1443799 Hydrostatic transmissions; valves KLOCKNER - HUMBOLDT - DEUTZ AG 10 Oct 1973 [11 Oct 1972] 47340/73 Headings F2W and F2V A pressure relief valve assembly for limiting- hydrostatic braking in a hydrostatic transmission comprising a pump 2 and a motor 5 comprises a valve member 10 spring loaded towards a seating 11, the face 12 of the valve member having respective coaxial surfaces loaded by the pressures in the lines 3 and 4 between pump and motor, the chamber 16 enclosing the spring 9 being pressurized by the higher pressure line 3 or 4 through a shuttle valve 13 and a throttle 14, and the pressure in chamber 9 being relievable through an escape valve 18. The valve 18 is electrically controlled from a current source 25 through a switch 26 operated by a direction selector lever and through one of two pressure operated switches 28, 30, these being actuated by return line pressure when this is sufficiently high (the switch 28 being in use in forward, position I of switch 26 when line 3 is return, and similarly for switch 30, actuated by pressure in line 4 in reverse, position II). On actuation of a pressure switch due to pump 2 being driven by motor 5 the electric circuit is closed, the valve 18 opened and the return line pressure is limited by a pressure regulating valve 21 which, by opening at a preset pressure to limit pressure in chamber 16 allows the valve member 10 to be lifted off its seat 11 by pressure on its face 12 and so by-pass fluid between lines 3 and 4. The valve 21 is adjustable to vary the preset pressure and so the hydrostatic braking possible. The transmission may be used on a motor vehicle.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722249743 DE2249743A1 (en) | 1972-10-11 | 1972-10-11 | VALVE UNIT |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1443799A true GB1443799A (en) | 1976-07-28 |
Family
ID=5858712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4734073A Expired GB1443799A (en) | 1972-10-11 | 1973-10-10 | Valve assembly |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2249743A1 (en) |
FR (1) | FR2203472A5 (en) |
GB (1) | GB1443799A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2736127A1 (en) * | 1995-06-30 | 1997-01-03 | Fendt Xaver Gmbh & Co | CONTROL DEVICE FOR AN ADJUSTABLE MECHANICAL HYDROSTATIC OR HYDROSTATIC MECHANISM |
EP1180598A2 (en) * | 2000-08-17 | 2002-02-20 | Bosch Rexroth AG | Valve assembly |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3132951A1 (en) * | 1981-08-20 | 1983-03-03 | Ing. Alfred Schmidt Gmbh, 7822 St Blasien | "HYDRAULIC SAFETY CONTROL DEVICE ON HYDRAULICALLY DRIVED DEVICES, IN PARTICULAR SNOW CLEANING MACHINES OR THE LIKE." |
DE3236566A1 (en) * | 1982-10-02 | 1984-04-05 | Robert Bosch Gmbh, 7000 Stuttgart | Device for cutting off the hydraulic working pressure generated by a pump |
DE3519148A1 (en) * | 1985-05-29 | 1986-12-04 | Wessel-Hydraulik GmbH, 2940 Wilhelmshaven | Valve arrangement between a main control valve and a hydraulic motor operating in an open circuit |
DE3928231A1 (en) * | 1989-08-26 | 1991-02-28 | Wilfried Boldt | Hydraulic hub drive with integrated pump and motor - utilises chain drive to supporting plate for whirling disc with cylinder-block by=pass for free-wheeling |
DE3928232A1 (en) * | 1989-08-26 | 1991-02-28 | Wilfried Boldt | Hydraulic hub drive with integrated pump and motor - utilises drive to spokes of wheel from whirling disc with cylinder-block by=pass for free-wheeling |
DE4237901C2 (en) * | 1992-11-10 | 1996-02-01 | Heilmeier & Weinlein | Electro-hydraulic control device and pressure reducing valve |
DE19648706C2 (en) * | 1996-11-25 | 1998-09-24 | Danfoss As | Hydraulic circuit for a vehicle drive with two hydraulic motors |
-
1972
- 1972-10-11 DE DE19722249743 patent/DE2249743A1/en active Pending
-
1973
- 1973-10-03 FR FR7335360A patent/FR2203472A5/fr not_active Expired
- 1973-10-10 GB GB4734073A patent/GB1443799A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2736127A1 (en) * | 1995-06-30 | 1997-01-03 | Fendt Xaver Gmbh & Co | CONTROL DEVICE FOR AN ADJUSTABLE MECHANICAL HYDROSTATIC OR HYDROSTATIC MECHANISM |
EP1180598A2 (en) * | 2000-08-17 | 2002-02-20 | Bosch Rexroth AG | Valve assembly |
EP1180598A3 (en) * | 2000-08-17 | 2003-04-16 | Bosch Rexroth AG | Valve assembly |
Also Published As
Publication number | Publication date |
---|---|
FR2203472A5 (en) | 1974-05-10 |
DE2249743A1 (en) | 1974-04-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |