GB1437335A - Pump - Google Patents

Pump

Info

Publication number
GB1437335A
GB1437335A GB1028773*[A GB1028773A GB1437335A GB 1437335 A GB1437335 A GB 1437335A GB 1028773 A GB1028773 A GB 1028773A GB 1437335 A GB1437335 A GB 1437335A
Authority
GB
United Kingdom
Prior art keywords
piston
bore
flushing
stepping motor
pump
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
GB1028773*[A
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.)
METERING PUMPS Ltd
Original Assignee
METERING PUMPS 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 METERING PUMPS Ltd filed Critical METERING PUMPS Ltd
Priority to GB1028773*[A priority Critical patent/GB1437335A/en
Priority to US390258A priority patent/US3922115A/en
Publication of GB1437335A publication Critical patent/GB1437335A/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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/04—Draining
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • 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
    • F04B49/22—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 by means of valves
    • F04B49/24—Bypassing
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • 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
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/26—Conditioning of the fluid carrier; Flow patterns
    • G01N30/28—Control of physical parameters of the fluid carrier
    • G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
    • G01N2030/326—Control of physical parameters of the fluid carrier of pressure or speed pumps

Landscapes

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

Abstract

1437335 Reciprocating pumps METERING PUMPS Ltd 21 Aug 1973 [23 Aug 1972 2 March 1973] 39324/72 and 10287/73 Heading F1A A pump, e.g. for chromatography analysis, comprises a piston 12 reciprocable for pumping in the smaller diameter bore 9 of a stepped cylinder 8, and movable into the larger diameter bore 10 for flushing. The piston is reciprocated by a screw 15 engaging a captive nut 13, the discharge stroke being effected by a variable-speed stepping motor (61), Fig. 3 (not shown), and a fast return stroke being effected by a fast drive motor (63) connected to the stepping motor by a clutch (64), which disengages the stepping motor from the pump drive when the fast drive motor is energized. Limit switches (50, 51), Fig. 4 (not shown), stop the piston at the top and bottom of its strokes in bore 9, a switch being provided to over-ride the lower limit switch to permit movement of the piston into bore 10 for flushing. During flushing, liquid drains via channel 21 and outlet 21a. A seal 18a, 18b, e.g. of P.T.F.E., has a bearing portion 19 with a leakage drain 20, 20a. A rupture disc 49 by-passes delivery to drain 21a when a predetermined delivery pressure is exceeded.
GB1028773*[A 1972-08-23 1973-03-02 Pump Expired GB1437335A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1028773*[A GB1437335A (en) 1972-08-23 1973-03-02 Pump
US390258A US3922115A (en) 1972-08-23 1973-08-21 Pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3932472 1972-08-23
GB1028773*[A GB1437335A (en) 1972-08-23 1973-03-02 Pump

Publications (1)

Publication Number Publication Date
GB1437335A true GB1437335A (en) 1976-05-26

Family

ID=26247424

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1028773*[A Expired GB1437335A (en) 1972-08-23 1973-03-02 Pump

Country Status (2)

Country Link
US (1) US3922115A (en)
GB (1) GB1437335A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293281A (en) * 1979-04-13 1981-10-06 Lamoreaux Charles L Mobile air charging system
NO152764C (en) * 1983-07-25 1985-11-13 Kleven Loland As SEALING DEVICE FOR A HIGH-PRESSURE AXIAL PUMP PUMP.
US5920006A (en) * 1997-06-16 1999-07-06 Digichrom, Inc. Liquid chromatographic pump and valve assembly
US6510780B1 (en) 1998-12-03 2003-01-28 Lomaxmain Limited Ball screw driven pump
US6149403A (en) * 1999-03-02 2000-11-21 Dyax Corporation Pump drive decoupler
US6257052B1 (en) * 1999-07-06 2001-07-10 Digichrom, Inc Pump, sample feed and valving for high performance liquid chromatography (HPLC)
US20080145245A1 (en) * 2004-12-22 2008-06-19 Wen-San Chou Compressor for tire inflating combination
WO2007016943A1 (en) * 2005-08-08 2007-02-15 Carrier Corporation Fluid engine or pump and method of operating an installation comprising a fluid engine or pump
DE102013112287B4 (en) 2013-11-08 2019-07-11 Dionex Softron Gmbh sampler
DE102014016141A1 (en) * 2014-10-30 2016-05-04 Khs Corpoplast Gmbh Piston assembly for pumping a liquid
ES2691391T3 (en) 2016-06-14 2018-11-27 Medaxis Ag Pump module
WO2020061025A1 (en) 2018-09-18 2020-03-26 Waters Technologies Corporation Variable output liquid chromatography pump drive
EP3853601A1 (en) 2018-09-18 2021-07-28 Waters Technologies Corporation Continuously variable output liquid chromatography pump drive

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2321828A (en) * 1941-11-24 1943-06-15 Lane Motors Inc Compressor
US3556679A (en) * 1968-08-08 1971-01-19 Continental Oil Co Metering pump
SE364112B (en) * 1972-06-19 1974-02-11 Alfa Laval Ab

Also Published As

Publication number Publication date
US3922115A (en) 1975-11-25

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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