US3549279A - Windscreen washer pumps - Google Patents

Windscreen washer pumps Download PDF

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Publication number
US3549279A
US3549279A US3549279DA US3549279A US 3549279 A US3549279 A US 3549279A US 3549279D A US3549279D A US 3549279DA US 3549279 A US3549279 A US 3549279A
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Prior art keywords
stator
rotor
chamber
fluid
pump
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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 - Lifetime
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Pierre C Grach
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CABLES DU MANS Ste
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STOP
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60SSERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00Cleaning of vehicles
    • B60S1/02Cleaning windscreens, windows or optical devices
    • B60S1/46Cleaning windscreens, windows or optical devices using liquid; Windscreen washers
    • B60S1/48Liquid supply therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/12Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/14Machines, pumps, or pumping installations having flexible working members having peristaltic action having plate-like flexible members

Description

Dec. 22, 1970 P. c. GRACH WINDSGREEN WASHER PUMPS Filed Jan. 6, 1969 .I/Vl/E/W'DR PIERRE c. 6mm B47, i 62 United States Patent 3,549,279 WINDSCREEN WASHER PUMPS Pierre C. Grach, Saint-Quen, France, assignor to Stop, Saint-Quen, Seine St. Denis, France Filed Jan. 6, 1969, Ser. No. 789,330 Claims priority, applicatilog France, Jan. 26, 1968,

Int. 01. F641; 43/08 US. Cl. 417-477 2 Claims ABSTRACT OF THE DISCLOSURE This invention relates to windscreen washer pumps and has specific reference to means for cleaning windscreens of automotive vehicles.

The pump according to this invention is adapted to be driven from a rotary electric motor energized from the storage battery of the vehicle through switch means controlled by the driver of the vehicle, so as to suck up water or a detergent solution kept in a reservoir and force this fluid towards nozzles or any other means provided for projecting it against the windscreen of the vehicle so as to clean same in conjunction with the windscreen wiper.

To obtain a satisfactory suction, irrespective of the relative level of the motor and pump unit and of the liquid in the reservoir, a self-priming pump must be used, i.e. a pump comprising a suction cycle during its rotation in order to create a cavity of gradually increasing volume or capacity which is connected to a reservoir at atmospheric or higher pressure.

In order to obtain a suflicient delivery pressure the above defined capacity is isolated from the reservoir and connected to the delivery port, and its volume is reduced to force the liquid towards the delivery port. This method is used in pumps of known type (whether of the gear, piston, radial blades or other types). Due to the variablevolume cavities available for the liquid, these pumps are objectionable in that when the liquid is solidified by frost they become locked and this may obviously prove detrimental to the windings of the driving motor, on account of the over-current developing therein as a consequence of the locked rotor. Besides, most of these pumps require a fluid-tight bearing for isolating the motor from the fluid contained in the pump, and thus prevent this fluid from leaking outside.

The pump according to this invention comprises, as a variable-volume capacity, an annular chamber having at least one elastic wall. In fact, during the rotation of the rotor, the centrifugal force is exerted against a plurality of members carried by the rotor and rolling on the deformable membrane; thus, these members close locally the annular chamber. Their movement along the wall of the annular chamber will thus create two variable-volume capacities connected to the pump suction and exhaust ports, respectively.

In the attached drawing:

FIG. 1 is a sectional view of the pump, the plane of the section containing the pump axis;

"ice

FIG. 2 is a section taken along the line AA of FIG. 1;

FIGS. 3 and 4 are views similar to FIG. 2 but showing different forms of embodiment.

The pump illustrated in FIGS. 1 and 2 of the drawing comprises a stator 2 and a pair of end covers or flanges 1 and 3. In the cover 1 which if desired may be an integral part of the driving motor (not shown) a central orifice 4 is formed to constitute a bearing for the driving shaft 5.

The stator 2 comprises an annular channel 6 and a longitudinal groove 7 formed in the inner cylindrical portion.

A cylindrical resilient membrane or sleeve 8 corresponding in shape to the cylindrical portion of the stator comprises two annular end flanges 9 adapted to retain the membrane in position and seal the assembly by being clamped between the stator 2 and the end covers 1 and 3 respectively.

This membrane 9 further comprises a longitudinal bead 10 interconnecting the annular end flanges SI and fitting in said longitudinal stator groove 7 so as to create a fluid-tight joint or break in the annular chamber formed by the stator channel 6 between said stator 2 and membrane 8.

On either side of this fluid-tight bead 10 a suction port 11 and a delivery port 12 are formed through the wall of said stator, respectively, as shown.

Rotatably mounted in the central chamber of the stator is a rotor 13 rotatably rigid with the motor-driven shaft -5 and formed with at least two cavities extending parallel to the axis of rotation. The function of these rotor cavities is to receive balls 14 and 15 therein. The shape and dimensions of these cavities are such that the balls 14, 15 are carried along by the rotor but can move radially so as to leave the membrane unstressed in their inoperative condition.

Thus, when the rotor 13 is driven from the motor (not shown) in the direction of the arrow of FIG. 2, this rotor carries along the balls 14, 15 and beyond a certain speed these balls are urged by the centrifugal force against the membrane. As the membrane is made of elastice material the force exerted thereagainst by the balls will press the membrane against the bottom of the annular channel -6, thus creating a local fluid-tight joint and forming at least three fluid-tight chambers 16, -17 and 18 in the annular channel, i.e. chamber 16 communicating with port 11, chamber 18 with port 12, chamber 17 being isolated.

{During the movement of rotation of the rotor in the direction of the arrow it will be seen that the volume of chamber 16 increases, thus producing a suction through port 11, chamber 17 having a constant volume and chamber 18 a decreasing volume, thus causing a delivery of fluid through port -17. This cycle will provide the desired pumping effect.

The cavities of rotor '13 are shaped as illustrated in FIG. 2 so that the ball-driving torque creates a radial component adding itself to the centrifugal force, as shown diagrammatically by the angle a of FIG. 2.

It is also possible to create an annular chamber in a cylindrical stator without channel by properly shaping the membrane, this membrane being urged against the stator wall by the rolling members such as balls, rollers or needles.

FIG. 3 shows a modified form of embodiment in which the annular chamber is formed by a tubular member 20 having resilient walls. In this case the balls may also be replaced by rollers or needles. During their movement of rotation the rolling members leave the tube '20 in an area 19 in which an elastic pad of the same material as the tube may be fitted to avoid any-discontunity in the nature of the annular track followed by the rolling members.

' FIG. 4 illustrates a modified arrangement applicable to both of the preceding examples and wherein the radial force urging the rolling members against the resilient-annular track is supplemented by a spring 21 or any other suitable resilient means, thus cutting off the fluid communication between the suction and delivery ports whe the motor is not energized.

It is clear that in any one of the pump constructions described herein when the liquid contained in the annular chamber is frozen and thus solidified, the radial clearance of the rolling member in its cavity permit nevertheless the rotation of the rotor without any abnormal reaction torque and without any risk of damaging the driving motor. What is claimed is:

1. A pump particularly applicable to windscreen washers, comprising a stator having central chamber and a suction port and a delivery port communicating with said central chamber, at least one elastic wall member mounted in said chamber of the stator and connected to said ports to define an annular chamber between said wall member and said stator, a rotor rotatably mounted in said central chamber coaxially with said stator, at least two diametrically opposed radial cavities in said stator parallel to the axis of rotation and which cavities have their largest dimension at their radially outermost end, ball means in each of said cavities and being urged against said elastic wall by centrifugal force when said rotor is rotated to form at least two variable volume capacities in said annular chamber, one of which is connected to the suction port and another of which is connected to the delivery port, the shape of said cavities being such that the ball-driving torque during the rotor rotation creates a radial component adding to the centrifugal force.

'2. A pump according to claim 1, wherein said elastic wall member comprises a cylindrical sleeve with annular end flanges, a longitudinal groove formed in said stator between said ports, a longitudinal bead formed on said sleeve and engaging in said groove in a fluid-tight manner, and end plate sealing said stator in a fluid-tight manner.

References Cited UNITED STATES PATENTS 2,885,966 5/1959 Ford 103 149 2,898,864 8/1959 Japolsky 103-149 [2,935,028 5/1960 Ferrari, Jr., et al. 103149 3,064,583 11/1962 Burt lO3--136(A) 3,137,240 6/1964 Hunt 103149 FOREIGN PATENTS 1,031,595 '6/ 1966 Great Britain 103-149 MARK NEWMAN, Primary Examiner W. I. GOODLIN, Assistant Examiner

US3549279A 1968-01-26 1969-01-06 Windscreen washer pumps Expired - Lifetime US3549279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR137677 1968-01-26

Publications (1)

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US3549279A true US3549279A (en) 1970-12-22

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ID=8645184

Family Applications (1)

Application Number Title Priority Date Filing Date
US3549279A Expired - Lifetime US3549279A (en) 1968-01-26 1969-01-06 Windscreen washer pumps

Country Status (6)

Country Link
US (1) US3549279A (en)
JP (1) JPS501922B1 (en)
DE (1) DE1901748C3 (en)
ES (1) ES358398A1 (en)
FR (1) FR1562957A (en)
GB (1) GB1208712A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417856A (en) * 1981-08-25 1983-11-29 Minissian Kevin G Peristaltic pump
US6036459A (en) * 1996-04-04 2000-03-14 Medtronic, Inc. Occlusion compensator for implantable peristaltic pump
WO2003100256A1 (en) * 2002-05-29 2003-12-04 Krister Juntunen Pump
US20070031272A1 (en) * 2005-08-05 2007-02-08 Molon Motor And Coil Corporation Peristaltic pump
US20090092507A1 (en) * 2005-08-05 2009-04-09 Ramirez Jr Emilio A Fluid pump systems
US20110058969A1 (en) * 2005-08-05 2011-03-10 Molon Motor And Coil Corporation Peristaltic Pump with Torque Relief
US8585379B2 (en) 2005-08-05 2013-11-19 Molon Motor And Coil Corporation Peristaltic pump that is resistant to torques and vibrations
WO2014135325A1 (en) * 2013-03-05 2014-09-12 Emitec Gesellschaft Für Emissionstechnologie Mbh Pump for metering a liquid additive for a selective catalytic reduction device
WO2014173666A1 (en) * 2013-04-26 2014-10-30 Emitec Gesellschaft Für Emissionstechnologie Mbh Pump for metering a liquid additive for a selective catalytic reduction device
US20160138589A1 (en) * 2013-06-13 2016-05-19 Continental Automotive Gmbh Pump for delivering a liquid
CN106662102A (en) * 2014-08-28 2017-05-10 大陆汽车有限责任公司 Pump for conveying a fluid, in particular for conveying an exhaust gas cleaning additive

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3326784C2 (en) * 1983-07-25 1986-06-05 Fresenius Ag, 6380 Bad Homburg, De
JP6203858B2 (en) * 2013-10-09 2017-09-27 株式会社ウエルコ pump
US20170268496A1 (en) * 2016-03-21 2017-09-21 John McIntyre Peristaltic pump

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885966A (en) * 1956-01-24 1959-05-12 Ford Reginald Clarence Rotary pumps
US2898864A (en) * 1956-12-27 1959-08-11 Nicotron Developments Ltd Rotary pumps
US2935028A (en) * 1957-08-05 1960-05-03 Technicon Instr Pumps
US3064583A (en) * 1957-03-29 1962-11-20 Bendix Corp Variable displacement pump
US3137240A (en) * 1961-07-17 1964-06-16 Russell G Hunt Pumps
GB1031595A (en) * 1963-10-22 1966-06-02 William Alexander Wemyss Improvements in compressible tube pumps

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885966A (en) * 1956-01-24 1959-05-12 Ford Reginald Clarence Rotary pumps
US2898864A (en) * 1956-12-27 1959-08-11 Nicotron Developments Ltd Rotary pumps
US3064583A (en) * 1957-03-29 1962-11-20 Bendix Corp Variable displacement pump
US2935028A (en) * 1957-08-05 1960-05-03 Technicon Instr Pumps
US3137240A (en) * 1961-07-17 1964-06-16 Russell G Hunt Pumps
GB1031595A (en) * 1963-10-22 1966-06-02 William Alexander Wemyss Improvements in compressible tube pumps

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417856A (en) * 1981-08-25 1983-11-29 Minissian Kevin G Peristaltic pump
US6036459A (en) * 1996-04-04 2000-03-14 Medtronic, Inc. Occlusion compensator for implantable peristaltic pump
WO2003100256A1 (en) * 2002-05-29 2003-12-04 Krister Juntunen Pump
US8469682B2 (en) 2005-08-05 2013-06-25 Molon Motor And Coil Corporation Peristaltic pump with torque relief
US20070031272A1 (en) * 2005-08-05 2007-02-08 Molon Motor And Coil Corporation Peristaltic pump
US20090092507A1 (en) * 2005-08-05 2009-04-09 Ramirez Jr Emilio A Fluid pump systems
US20110058969A1 (en) * 2005-08-05 2011-03-10 Molon Motor And Coil Corporation Peristaltic Pump with Torque Relief
US8585379B2 (en) 2005-08-05 2013-11-19 Molon Motor And Coil Corporation Peristaltic pump that is resistant to torques and vibrations
CN105121851A (en) * 2013-03-05 2015-12-02 大陆汽车有限责任公司 Pump for metering a liquid additive for a selective catalytic reduction device
WO2014135325A1 (en) * 2013-03-05 2014-09-12 Emitec Gesellschaft Für Emissionstechnologie Mbh Pump for metering a liquid additive for a selective catalytic reduction device
US10054116B2 (en) 2013-03-05 2018-08-21 Continental Automotive Gmbh Pump for metering a liquid additive for a selective catalytic reduction device
WO2014173666A1 (en) * 2013-04-26 2014-10-30 Emitec Gesellschaft Für Emissionstechnologie Mbh Pump for metering a liquid additive for a selective catalytic reduction device
CN105339662A (en) * 2013-04-26 2016-02-17 大陆汽车有限责任公司 Pump for metering liquid additive for selective catalytic reduction device
US9835154B2 (en) 2013-04-26 2017-12-05 Continental Automotive Gmbh Pump for metering a liquid additive for a selective catalytic reduction device
US20160138589A1 (en) * 2013-06-13 2016-05-19 Continental Automotive Gmbh Pump for delivering a liquid
CN106662102A (en) * 2014-08-28 2017-05-10 大陆汽车有限责任公司 Pump for conveying a fluid, in particular for conveying an exhaust gas cleaning additive

Also Published As

Publication number Publication date Type
ES358398A1 (en) 1970-03-01 application
GB1208712A (en) 1970-10-14 application
DE1901748C3 (en) 1979-09-13 grant
DE1901748B2 (en) 1979-01-18 application
FR1562957A (en) 1969-04-11 grant
DE1901748A1 (en) 1969-09-04 application
JPS501922B1 (en) 1975-01-22 grant

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AS Assignment

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BENDIX FRANCE;REEL/FRAME:004694/0407

Owner name: SOCIETE DES CABLES DU MANS, FRANCE

Effective date: 19871128

AS Assignment

Owner name: SOCIETE DES CABLES DU MANS, 50, AVENUE DE LA LIBER

Free format text: RE-RECORD OF AN INSTRUMENT RECORDED MAY 15, 1987 AT REEL 4694 FRAME 407-409 TO CORRECT THE PATENT NUMBER ERRORENOUSLY STATED AS 3,549,229.;ASSIGNOR:BENDIX FRANCE, A CORP. OF FRANCE;REEL/FRAME:004763/0797

Effective date: 19871005

Free format text: RE-RECORD OF AN INSTRUMENT RECORDED MAY 15, 1987 AT REEL 4694 FRAME 407-409 TO CORRECT THE PATENT NUMBER ERRORENOUSLY STATED AS 3,549,229;ASSIGNOR:BENDIX FRANCE, A CORP. OF FRANCE;REEL/FRAME:004763/0797

Owner name: SOCIETE DES CABLES DU MANS,FRANCE

Free format text: RE-RECORD OF AN INSTRUMENT RECORDED MAY 15, 1987 AT REEL 4694 FRAME 407-409 TO CORRECT THE PATENT NUMBER ERRORENOUSLY STATED AS 3,549,229;ASSIGNOR:BENDIX FRANCE;REEL/FRAME:004763/0797

Owner name: SOCIETE DES CABLES DU MANS, FRANCE