GB1305116A - - Google Patents
Info
- Publication number
- GB1305116A GB1305116A GB3248470A GB3248470A GB1305116A GB 1305116 A GB1305116 A GB 1305116A GB 3248470 A GB3248470 A GB 3248470A GB 3248470 A GB3248470 A GB 3248470A GB 1305116 A GB1305116 A GB 1305116A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pumps
- valve
- delivery
- pressure
- july
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/007—Installations or systems with two or more pumps or pump cylinders, wherein the flow-path through the stages can be changed, e.g. from series to parallel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Fluid Gearings (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
1305116 Fluid-pressure servomotor systems CONSTANTIN RAUCH 3 July 1970 [4 July 1969] 32484/70 Heading G3P The delivery of two adjustable hydraulic pumps 3, 4 driven by a common prime mover 1 is controlled by two hydraulic devices 13, 14 supplied through non-return valves 28, 29 from a control valve 16 sensitive to the speed of the prime mover. A centrifugal governor 15 driven by gearing 2 between the pumps and prime-mover causes the valve 16 to reduce the pump output when over-loading causes a reduction of speed. The maximum pressure in each pump delivery line 5, 6 is controlled by a valve 19 or 20 supplying fluid to the corresponding pump adjustment device when delivery pressure rises due to increased load in closure of a valve 9 or 10. Throttles 26, 27 ensure that the pumps are adjusted to a position in which they deliver only the necessary leakage and lubricating oil at low pressure. The pumps may also be adjusted by control devices 21, 22.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1933951A DE1933951C3 (en) | 1969-07-04 | 1969-07-04 | Control device for limiting the sum of the consumed power of two or more adjustable hydraulic pumps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1305116A true GB1305116A (en) | 1973-01-31 |
Family
ID=5738852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3248470A Expired GB1305116A (en) | 1969-07-04 | 1970-07-03 |
Country Status (5)
Country | Link |
---|---|
US (1) | US3649134A (en) |
DE (1) | DE1933951C3 (en) |
FR (1) | FR2054049A5 (en) |
GB (1) | GB1305116A (en) |
SE (1) | SE350572B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3739974A (en) * | 1970-04-13 | 1973-06-19 | Production Technology Inc | Conversion of variable delivery pump to fixed delivery pump for a friction welder |
US3841795A (en) * | 1972-07-17 | 1974-10-15 | Caterpillar Tractor Co | Combined engine speed and pressure responsive control for variable displacement pumps |
DE2331617A1 (en) * | 1973-06-22 | 1975-01-16 | Bosch Gmbh Robert | CONTROL DEVICE FOR HYDROPUMPS |
US4029439A (en) * | 1975-12-22 | 1977-06-14 | Abex Corporation | Control system for variable displacement pumps |
US4008004A (en) * | 1975-12-22 | 1977-02-15 | Abex Corporation | Control system for variable displacement pumps |
DE3728207A1 (en) * | 1987-08-24 | 1989-03-09 | Rexroth Mannesmann Gmbh | Valve arrangement for two load-regulated pumps driven by a common drive |
US6016691A (en) * | 1998-02-25 | 2000-01-25 | Siemens Canada Ltd. | Calibrated toggle lever of leak detection module pump |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2588481A (en) * | 1942-07-22 | 1952-03-11 | Niles Bement Pond Co | Fuel injector pump mechanism |
US2629982A (en) * | 1947-01-23 | 1953-03-03 | Rolls Royce | Fuel system for gas-turbine engines |
US2594790A (en) * | 1947-03-03 | 1952-04-29 | Rolls Royce | Fuel system for internal-combustion engines |
US2936712A (en) * | 1958-01-20 | 1960-05-17 | Deere & Co | Variable displacement pump |
US3065700A (en) * | 1961-04-11 | 1962-11-27 | Fairchild Stratos Corp | Hydrostatic steering arrangement |
-
1969
- 1969-07-04 DE DE1933951A patent/DE1933951C3/en not_active Expired
-
1970
- 1970-07-02 FR FR7024576A patent/FR2054049A5/fr not_active Expired
- 1970-07-02 US US51858A patent/US3649134A/en not_active Expired - Lifetime
- 1970-07-03 GB GB3248470A patent/GB1305116A/en not_active Expired
- 1970-07-03 SE SE09266/70A patent/SE350572B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
DE1933951A1 (en) | 1971-01-21 |
DE1933951C3 (en) | 1974-08-29 |
DE1933951B2 (en) | 1973-06-14 |
US3649134A (en) | 1972-03-14 |
SE350572B (en) | 1972-10-30 |
FR2054049A5 (en) | 1971-04-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |