GB519290A - Improvements in pressure control units for variable delivery pumps - Google Patents
Improvements in pressure control units for variable delivery pumpsInfo
- Publication number
- GB519290A GB519290A GB29758/38A GB2975838A GB519290A GB 519290 A GB519290 A GB 519290A GB 29758/38 A GB29758/38 A GB 29758/38A GB 2975838 A GB2975838 A GB 2975838A GB 519290 A GB519290 A GB 519290A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pump
- pressure
- cylinder
- piston
- spring
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
519,290. Pressure control of variable delivery pumps. VICKERS, Inc. Oct. 14, 1938, No. 29758. Convention date, Nov. 5, 1937. [Class 102 (i)] A pressure control unit for a variable delivery pump 1 comprises a cylinder' 6 containing a slidable spring-pressed piston 7 which is connected to the volume control part 3 of the pump, pressure connections 17, 18, 19, 21 and 22 between the pump and the housing, and a spring-controlled check valve 16 and a restricted passageway 20 in said pressure connections located between the pump and an outlet connection thereof. The housing 6 is formed with two cylinder portions 9, 9a to receive the piston 7 which has a central enlarged spool 10 and is hollow to accommodate a relatively light spring 12. The cylinder 13 of valve 16 is connected to an outlet by means of a passageway 23 and the bore of the piston 7. If the pump pressure exceeds the setting of the valve 16, the port 15 is opened and the pressure to the' lift of the spool 10 will exhaust at a faster rate than it can be supplied through the restriction 20. The pressure to the right of the spool 10 overcomes the spring 12 and the piston 7 is moved to the left to decrease the angle beween the part 3 and the'pump 1, and so reduce its output. In a modification, the check valve is located in the connection between the pump and the cylinder housing, and the restriction is located beween the cylinder housing and the outlet connection.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US519290XA | 1937-11-05 | 1937-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB519290A true GB519290A (en) | 1940-03-20 |
Family
ID=21974271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29758/38A Expired GB519290A (en) | 1937-11-05 | 1938-10-14 | Improvements in pressure control units for variable delivery pumps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB519290A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2930106A1 (en) * | 1979-07-25 | 1981-02-12 | Linde Ag | Hydraulic pump with differential piston - has auxiliary spring in-side bottom piston half, assisting return at zero position |
| DE3214212A1 (en) * | 1982-04-17 | 1983-10-20 | Alfred Teves Gmbh, 6000 Frankfurt | Pressure control device for pumps, especially vane cell pumps |
-
1938
- 1938-10-14 GB GB29758/38A patent/GB519290A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2930106A1 (en) * | 1979-07-25 | 1981-02-12 | Linde Ag | Hydraulic pump with differential piston - has auxiliary spring in-side bottom piston half, assisting return at zero position |
| DE3214212A1 (en) * | 1982-04-17 | 1983-10-20 | Alfred Teves Gmbh, 6000 Frankfurt | Pressure control device for pumps, especially vane cell pumps |
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