US3738776A - Pumping device, especially for water supply - Google Patents

Pumping device, especially for water supply Download PDF

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Publication number
US3738776A
US3738776A US00168213A US3738776DA US3738776A US 3738776 A US3738776 A US 3738776A US 00168213 A US00168213 A US 00168213A US 3738776D A US3738776D A US 3738776DA US 3738776 A US3738776 A US 3738776A
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United States
Prior art keywords
pump
diaphragm
pressure
pumping device
motor
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Expired - Lifetime
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US00168213A
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English (en)
Inventor
J Debare
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.)
EQUIP MENAGEN SOC FR
SOC FRANCAISE D'EQUIPEMENT MENAGEN FR
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EQUIP MENAGEN SOC FR
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0053—Venting means for starting

Definitions

  • the invention relates to a pumping device comprising a pump driven by a motor, a diaphragm which is subjected to the water pressure downstream of the pump and a contactor which is actuated by the diaphragm for the purpose of controlling the motor.
  • the pump is of the gear type and a check-valve is placed upstream of the diaphragm in the distribution line which is supplied by the pump.
  • the invention is of particular interest for the supply of water to caravans, bungalows or like premises.
  • This invention relates to a pumping device, in particular for supplying water to a caravan, a bungalow or any other premises.
  • an electric motor drives a pump and is started up, for example, by means of a pedal which must be located near the watersupply cock.
  • the aim of the invention is to overcome the many disadvantages referred-to and to provide a pumping device of simple, rugged and inexpensive constructional design which can be operated with a high degree of ease and convenience.
  • the pumping device which is primarily designed to supply water to a caravan, a bungalow or other premises comprises a pump driven by a motor, a pressure-sensing element such as a diaphragm which is subjected to the water pressure downstream of the pump and a contactor actuated by the diaphragm for controlling the motor is characterized in that the pump is of the gear type and that a check-valve is placed upstream of the diaphragm in' the distribution line which is fed by the pump.
  • gear-type pump makes it possible to reduce the power consumption to a level such that disposable dry cells can be employed, thus permitting a substantial reduction in operating costs.
  • the toothed wheels of the pump are housed in acavity of a pump body on which the motor is .fixed whilst the checkvalve, the diaphragm and the contactor are integrated .in the form of a unitary assembly which is connected to g the pump.
  • the pump body is constructed in one piece with a second body in which is formed a chamber, said chamber being closed by the diaphragm and adapted to communicate with a passageway which is connected to the pump and can be sealed-off by the check-valve.
  • the structure of the device is thus simplified to a remarkable degree and manufacture of the pump body is consequently facilitated.
  • FIG. 1 is a general diagram of a pumping device in accordance with the invention
  • FIG. 2 is a view in part-sectional elevation showing one industrial form of construction, this view being taken along line Il-II of FIG. 3;
  • FIG. 3 is a bottom view of the device of FIG. 2 after the base plate has been removed;
  • FIG. 4 is a part-sectional view taken along line IV-IV of FIG. 3 after the check-valve has been removed.
  • the pumping device which is shown diagrammatically in FIG. 1 comprises a pump 1 of the gear type which is driven by an electric motor 2 and connected by means of a water admission line 3 to a storage tank 4.
  • a check-valve 6 mounted in the distribution line 5 which is fed by the pump a check-valve 6 followed by an assembly consisting of diaphragm 7 and contactor 8; the diaphragm which is subjected to the water pressure downstream of the pump actuates the contactor which in turn controls the operation of the motor.
  • the distribution line terminates in either one or a number of cocks such as the cock 9.
  • Opening of the cock 9 causes a pressure drop within the distribution line 5 at the level of the diaphragm 7, with the result that the contactor is not actuated by the diaphragm and closes the electric circuit of the motor which is automatically started-up.
  • the pump then comes into operation in order to feed the cock.
  • the bulb 10 serves to prime the pump both rapidly and easily; when the bulb is compressed, the air within the line 3 is driven through the water of the tank 4; when the bulb is released, the water penetrates into the line and reaches the pump.
  • FIGS. 2 to 4 illustrate one example of industrial construction which is specifically designed for supplying water to a caravan or a bungalow.
  • the gear pump 1 is housed within a cavity 12 of a pump body 11 which is preferably formed of molded plastic material such as an acetal resin.
  • the electric motor 2 which is of conventional type and operates for example at a voltage of 12 volts and a speed of 4,000
  • rpm is fixed on the pump body 11; the rotor 13 of said motor is fitted with a shaft 14 which is rotatably mounted within a bore of the pump body and within the cavity 12 after having passed through a seal 15 of rubber, for example.
  • Said shaft carries one of the toothed wheels 16 of the gear pump whilst the other wheel 17 is freely mounted on a pin 18 which is fixed within the pump body 11.
  • the cavity 12 is formed by two cylindrical molded recesses in which the toothed wheels l6, l7 rotate with minimum play. There have also been formed within the body 11 at the time of molding a passageway 19 for the admission of water which opens into the cavity 12 and a passageway 20 for the discharge of water which extends from the cavity on the opposite side.
  • the pump body 11 is formed in one piece with a second body 21 in which is formed a chamber 22, said chamber being closed by the diaphragm 7 and capable of communicating with a cavity 23 into which opens the discharge passageway 20 (as shown in particular in FIG. 3) and which can be sealed-off by the valve.
  • the check-valve 6 whose seat 24 is formed by the body 21 is mounted within the chamber 22, the restoring spring 25 of the valve being attached to a perforated plate 26 which is placed beneath the diaphragm 7.
  • Said diaphragm is constituted, for example, by a sheet of rubber which is fixed in position on the body 21 by means of a cover 27.
  • the cover encloses the contactor 8 and a push-rod 28 which is applied against the diaphragm 7 and urged towards this latter by a restoring spring 29.
  • the priming bulb (which is not shown in FIG. 2) is mounted between said duct and, for example, a flexible hose which terminates in the storage tank 4.
  • the chamber 22 communicates with a discharge duct 31 which forms part of the distribution line 5 and is molded in one piece with the body 21; for example, said duct is extended by a flexible hose which leads to the cock 9.
  • the contactor8 is constituted by a flexible-strip device of known type comprising a strip 32 which is attached to the cover 27 and curved downwards in order to permit engagement with the push-rod 28 and an element 33 which is connected on one side to the strip 32 and on the other side to a strip 34 which carries a movable contact-stud 35 and this latter cooperates with either of two stationary contact-studs 36 and 36a.
  • the contact-studs 35, 36 form part of the electric circuit of the motor 2 and the contact made between said studs initiates closure of the circuit and therefore the supply of current to the motor.
  • the two bodies 11, 21 are fixed on a stainless steel base plate 37 which forms the bottom of the cavity 12, of the passageways 19, and the ducts 30, 31.
  • a toric seal 38 which is placed within a groove formed in the bodies 1 1, 21 so as to surround all the cavities or openings ensures leak-tightness between the plate 37 and the bodies 1 l, 21. Attachment of said bodies is carried out by means of screws, for example, which are engaged in holes 39, 40, the holes 39 being also provided for the purpose of fixing the motor 2 on the body 11 and the holes 40 being provided in order to fix the cover 27 on the body 21.
  • the construction of the pumping device which has been described in the foregoing calls for only a small number of inexpensive parts which are integrated in a compact assembly of small overall size. By reason of its low power consumption, the device can be supplied by means of disposable dry cells.
  • a pumping device for liquid supply comprising a gear pump, an electric motor driving said gear pump, a distribution system fed with liquid by said pump, said distribution system comprising a pressure-sensing diaphragm downstream of the pump and subjected to liquid pressure downstream of the pump, an electric contactor actuated by said pressure-sensing diaphragm to control said motor, and a single check valve located downstream of said pump and upstream of said pressure-sensing diaphragm, said check valve being mounted in a chamber of a first body which is integral with a body in which said gear pump is housed, said chamber being closed by said pressure-sensing diaphragm and communicating with a passageway which is connected to the pump and which is adapted to be closed by said check valve, said check valve having a restoring member which is secured to a perforated plate mounted adjacent the diaphragm.
  • a pumping device as claimed in claim 1 and a cover which maintains said diaphragm against the firstmentioned body, said cover containing said electric COl'ltflCtOI.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US00168213A 1970-09-24 1971-08-02 Pumping device, especially for water supply Expired - Lifetime US3738776A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7034616A FR2106788A5 (enrdf_load_stackoverflow) 1970-09-24 1970-09-24

Publications (1)

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US3738776A true US3738776A (en) 1973-06-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00168213A Expired - Lifetime US3738776A (en) 1970-09-24 1971-08-02 Pumping device, especially for water supply

Country Status (3)

Country Link
US (1) US3738776A (enrdf_load_stackoverflow)
FR (1) FR2106788A5 (enrdf_load_stackoverflow)
GB (1) GB1321915A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4277227A (en) * 1979-07-02 1981-07-07 Imed Corporation Apparatus for converting a pump to a controller
USRE31315E (en) * 1979-07-02 1983-07-19 Imed Corporation Apparatus for converting a pump to a controller
US4544328A (en) * 1982-10-05 1985-10-01 The Coca-Cola Company Sold-out device for syrup pump
US4565488A (en) * 1983-10-21 1986-01-21 Accuspray, Inc. Compressor
US4596514A (en) * 1982-10-21 1986-06-24 Mitsubishi Denki Kabushiki Kaisha Pressure responsive pump drive motor control apparatus having spot switch and alarm lamp
US4728264A (en) * 1986-10-10 1988-03-01 Walbro Corporation Fuel delivery system with pressure-controlled electric pump
US4811862A (en) * 1987-04-27 1989-03-14 Arthur Guinness Son And Company Limited Unified assembly for control of fluid flow and a liquid dispensing system which includes such an assembly
US5281782A (en) * 1992-04-28 1994-01-25 Campbell Hausfeld Diaphragm pressure switch
WO1995023703A1 (en) * 1994-03-04 1995-09-08 Diagraph Corporation Ink jet printing system
US5482439A (en) * 1995-01-09 1996-01-09 Chen; Chi-Wen Power breaker for a compressor for automobiles with a curved plug and wrinkled control disk
AU674611B2 (en) * 1994-10-17 1997-01-02 Ugo Ciurlo Electromechanical device for the protection of a pump in waterworks of various types, in the absence of water
US5672049A (en) * 1993-04-28 1997-09-30 Ciurlo; Ugo Electromechanical device for the protection of a pump in waterworks of various types, in the absence of water
US5863185A (en) * 1994-10-05 1999-01-26 Franklin Electric Co. Liquid pumping system with cooled control module
US5915925A (en) * 1997-01-07 1999-06-29 North, Jr.; Howard L. Pulseless liquid supply system for flow cytometry

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126636Y2 (enrdf_load_stackoverflow) * 1978-03-29 1986-08-09
US4551069A (en) * 1984-03-14 1985-11-05 Copeland Corporation Integral oil pressure sensor
GB2197687B (en) * 1986-11-25 1991-06-26 Water Res Centre Operational pump control

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE158828C (enrdf_load_stackoverflow) *
US2123651A (en) * 1935-10-23 1938-07-12 John W Gallagher Self-priming centrifugal pump
US2631540A (en) * 1948-11-24 1953-03-17 Gen Motors Corp Rotary fluid pump
US2956507A (en) * 1953-12-04 1960-10-18 Clyde E Hutchinson Aquarium cleaning device
US3120814A (en) * 1959-10-21 1964-02-11 Mueller Otto Variable delivery and variable pressure vane type pump
US3380468A (en) * 1964-06-18 1968-04-30 Ke Marc Res Div Fluid infusion apparatus
US3387105A (en) * 1965-03-18 1968-06-04 Peters & Russell Inc Pressure and dry tank switch assembly
US3446238A (en) * 1964-10-06 1969-05-27 Britt Tech Corp Pressure actuated valve
US3694105A (en) * 1970-10-02 1972-09-26 Thomas B Martin Fluid pressure system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE158828C (enrdf_load_stackoverflow) *
US2123651A (en) * 1935-10-23 1938-07-12 John W Gallagher Self-priming centrifugal pump
US2631540A (en) * 1948-11-24 1953-03-17 Gen Motors Corp Rotary fluid pump
US2956507A (en) * 1953-12-04 1960-10-18 Clyde E Hutchinson Aquarium cleaning device
US3120814A (en) * 1959-10-21 1964-02-11 Mueller Otto Variable delivery and variable pressure vane type pump
US3380468A (en) * 1964-06-18 1968-04-30 Ke Marc Res Div Fluid infusion apparatus
US3446238A (en) * 1964-10-06 1969-05-27 Britt Tech Corp Pressure actuated valve
US3387105A (en) * 1965-03-18 1968-06-04 Peters & Russell Inc Pressure and dry tank switch assembly
US3694105A (en) * 1970-10-02 1972-09-26 Thomas B Martin Fluid pressure system

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE31315E (en) * 1979-07-02 1983-07-19 Imed Corporation Apparatus for converting a pump to a controller
US4277227A (en) * 1979-07-02 1981-07-07 Imed Corporation Apparatus for converting a pump to a controller
US4544328A (en) * 1982-10-05 1985-10-01 The Coca-Cola Company Sold-out device for syrup pump
US4596514A (en) * 1982-10-21 1986-06-24 Mitsubishi Denki Kabushiki Kaisha Pressure responsive pump drive motor control apparatus having spot switch and alarm lamp
US4565488A (en) * 1983-10-21 1986-01-21 Accuspray, Inc. Compressor
US4728264A (en) * 1986-10-10 1988-03-01 Walbro Corporation Fuel delivery system with pressure-controlled electric pump
US4811862A (en) * 1987-04-27 1989-03-14 Arthur Guinness Son And Company Limited Unified assembly for control of fluid flow and a liquid dispensing system which includes such an assembly
US5281782A (en) * 1992-04-28 1994-01-25 Campbell Hausfeld Diaphragm pressure switch
US5672049A (en) * 1993-04-28 1997-09-30 Ciurlo; Ugo Electromechanical device for the protection of a pump in waterworks of various types, in the absence of water
WO1995023703A1 (en) * 1994-03-04 1995-09-08 Diagraph Corporation Ink jet printing system
US5767883A (en) * 1994-03-04 1998-06-16 Diagraph Corporation Ink jet printing system
US5863185A (en) * 1994-10-05 1999-01-26 Franklin Electric Co. Liquid pumping system with cooled control module
AU674611B2 (en) * 1994-10-17 1997-01-02 Ugo Ciurlo Electromechanical device for the protection of a pump in waterworks of various types, in the absence of water
US5482439A (en) * 1995-01-09 1996-01-09 Chen; Chi-Wen Power breaker for a compressor for automobiles with a curved plug and wrinkled control disk
US5915925A (en) * 1997-01-07 1999-06-29 North, Jr.; Howard L. Pulseless liquid supply system for flow cytometry
US5971713A (en) * 1997-01-07 1999-10-26 North, Jr.; Howard L. Pulseless liquid delivery system using a pulsatile pump
US6017194A (en) * 1997-01-07 2000-01-25 North, Jr.; Howard L. Method of controlling the drive means for a pump delivering liquid to an accumlator
US6200101B1 (en) 1997-01-07 2001-03-13 Howard L. North, Jr. Method for providing consistent liquid pressure output from an accumulator

Also Published As

Publication number Publication date
GB1321915A (en) 1973-07-04
FR2106788A5 (enrdf_load_stackoverflow) 1972-05-05

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