GB1437736A - Apparatus for directing fluid flow into different delivery ducts - Google Patents
Apparatus for directing fluid flow into different delivery ductsInfo
- Publication number
- GB1437736A GB1437736A GB681474A GB681474A GB1437736A GB 1437736 A GB1437736 A GB 1437736A GB 681474 A GB681474 A GB 681474A GB 681474 A GB681474 A GB 681474A GB 1437736 A GB1437736 A GB 1437736A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- fluid flow
- pump
- feb
- piston
- 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
- 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
- F15B13/043—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 electrically-controlled pilot valves
- F15B13/0431—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 electrically-controlled pilot valves the electrical control resulting in an on-off function
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/12—Fluid oscillators or pulse generators
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Reciprocating Pumps (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
1437736 Valves ROBERT BOSCH GmbH 14 Feb 1974 [15 Feb 1973] 6814/74 Heading F2V [Also in Division G3] A change-over valve 3 for dividing the fluid flow from a constant delivery pump 1 between a working cylinder 12 and a reservoir 2 is actuated by an independent fluid pressure medium acting on a piston 7. The supply of the medium from a pump 18 to either side of the piston is controlled by pilot valves 15, 16 which are electro-magnetically actuated through an electric pulse generator 19. The time one valve is open while the other is closed depends on the length of the pulses relative to their frequency. The pulse length and frequency can be varied to such an extent that one valve is always open while the other is closed. A first pressure limiting valve 4 is included in the input conduit and a second such valve 17 is included in the conduit from the pump 18.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732307351 DE2307351A1 (en) | 1973-02-15 | 1973-02-15 | METHOD AND EQUIPMENT FOR CONTROLLING THE FLOW OF A CONSTANT PUMP |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1437736A true GB1437736A (en) | 1976-06-03 |
Family
ID=5871936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB681474A Expired GB1437736A (en) | 1973-02-15 | 1974-02-14 | Apparatus for directing fluid flow into different delivery ducts |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS49113201A (en) |
| DE (1) | DE2307351A1 (en) |
| GB (1) | GB1437736A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2158971A (en) * | 1984-02-22 | 1985-11-20 | Koehring Co | Digital servovalve structure and method |
| US4951459A (en) * | 1988-08-30 | 1990-08-28 | Allied-Signal Inc. | Methods for metering fluid and apparatus for use therewith |
| GB2248910B (en) * | 1990-08-28 | 1994-08-03 | Trans Nordic Hydraulics Limite | Electrical operation of fluid-pressure devices |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3712716A1 (en) * | 1986-08-01 | 1988-02-04 | Man Nutzfahrzeuge Gmbh | PROCESS FOR REDUCING LOSSES, CHANGING THE SUPPLY CURRENT OF A CONSTANT FEED PUMP AND DEVICE FOR PERFORMING THE PROCESS |
| DE102019007277A1 (en) | 2019-10-18 | 2021-04-22 | Bomag Gmbh | Fixed displacement pump for use in pumping hydraulic fluid in a closed hydraulic circuit, closed hydraulic circuit, construction machine and method for operating a fixed displacement pump in a closed hydraulic circuit |
-
1973
- 1973-02-15 DE DE19732307351 patent/DE2307351A1/en active Pending
-
1974
- 1974-02-13 JP JP49017500A patent/JPS49113201A/ja active Pending
- 1974-02-14 GB GB681474A patent/GB1437736A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2158971A (en) * | 1984-02-22 | 1985-11-20 | Koehring Co | Digital servovalve structure and method |
| US4951459A (en) * | 1988-08-30 | 1990-08-28 | Allied-Signal Inc. | Methods for metering fluid and apparatus for use therewith |
| GB2248910B (en) * | 1990-08-28 | 1994-08-03 | Trans Nordic Hydraulics Limite | Electrical operation of fluid-pressure devices |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2307351A1 (en) | 1974-08-22 |
| JPS49113201A (en) | 1974-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |