GB519290A - Improvements in pressure control units for variable delivery pumps - Google Patents

Improvements in pressure control units for variable delivery pumps

Info

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
Application number
GB29758/38A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vickers Inc
Original Assignee
Vickers Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vickers Inc filed Critical Vickers Inc
Publication of GB519290A publication Critical patent/GB519290A/en
Expired legal-status Critical Current

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.
GB29758/38A 1937-11-05 1938-10-14 Improvements in pressure control units for variable delivery pumps Expired GB519290A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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