GB1450538A - Pumps - Google Patents

Pumps

Info

Publication number
GB1450538A
GB1450538A GB4873973A GB4873973A GB1450538A GB 1450538 A GB1450538 A GB 1450538A GB 4873973 A GB4873973 A GB 4873973A GB 4873973 A GB4873973 A GB 4873973A GB 1450538 A GB1450538 A GB 1450538A
Authority
GB
United Kingdom
Prior art keywords
piston
cylinder
valves
liquid
stroke
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
GB4873973A
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.)
MARSHALL HYDRAULICS Ltd
Original Assignee
MARSHALL HYDRAULICS Ltd
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 MARSHALL HYDRAULICS Ltd filed Critical MARSHALL HYDRAULICS Ltd
Priority to GB4873973A priority Critical patent/GB1450538A/en
Publication of GB1450538A publication Critical patent/GB1450538A/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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
    • F04B9/105—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L23/00—Valves controlled by impact by piston, e.g. in free-piston machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

1450538 Reciprocating pumps and motors; intensifiers MARSHALL HYDRAULICS Ltd 16 Oct 1974 [19 Oct 1973] 48739/73 Headings F1A and F1D A hydraulic pump or intensifier comprises a differential piston 4, Fig. 2 reciprocated in cylinders 26, 31 by pressurized liquid controlled by valves (2), 3 operated at or towards the end of each piston stroke by a toggle mechanism 5 connected to the piston by a rod 6 with an enlarged end 8 movable in a blind bore 7 in-the piston and engaged by the bore end 10 or an abutment 9 towards the end of each stroke. Toggle mechanism 5 acts on the valves via cams (18), 19 rollers (16), 17 and levers (14), 15. In the intensifier shown cylinder 31 has an inlet/outlet port (34), Fig. 1 (not shown), connected via a check-valve (35) and an adjustable needle valve (38), Fig. 4 (not shown), to the pressurized liquid inlet, and connected via two check-valves (36), (44) and a pressure gauge to an outlet, the supply of pressurized liquid to cylinder 31 effecting the rightward stroke of the piston while the right-hand end of cylinder 26 is connected to exhaust. The leftward piston stroke to discharge liquid from cylinder 31 is effected by pressurized liquid supplied to the right-hand end of cylinder 26. In the pump of Figs. 5 to 7 (not shown), two pairs of valves are controlled by the toggle mechanism for connecting the opposite sides of the large end of the piston alternately to a pressurized supply of a first liquid, e.g. water, and exhaust, the small end of the piston acting to pump a second liquid e.g. soluble oil, the outlets from the actuating cylinder being connected to the outlet from the pumping cylinder so that a mixture of the two liquids is delivered. The intensifier may be used for testing mine roof supports, and the pump for supplying an oil and water mixture for mine roof supports.
GB4873973A 1973-10-19 1973-10-19 Pumps Expired GB1450538A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4873973A GB1450538A (en) 1973-10-19 1973-10-19 Pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4873973A GB1450538A (en) 1973-10-19 1973-10-19 Pumps

Publications (1)

Publication Number Publication Date
GB1450538A true GB1450538A (en) 1976-09-22

Family

ID=10449735

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4873973A Expired GB1450538A (en) 1973-10-19 1973-10-19 Pumps

Country Status (1)

Country Link
GB (1) GB1450538A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO340558B1 (en) * 2015-10-17 2017-05-15 Obs Tech As Voidpumpe
WO2020207561A1 (en) * 2019-04-09 2020-10-15 Obs Technology As Pump device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO340558B1 (en) * 2015-10-17 2017-05-15 Obs Tech As Voidpumpe
WO2020207561A1 (en) * 2019-04-09 2020-10-15 Obs Technology As Pump device
US11795927B2 (en) 2019-04-09 2023-10-24 Obs Technology As Pump device

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee