US3244111A - Dual pump - Google Patents
Dual pump Download PDFInfo
- Publication number
- US3244111A US3244111A US487133A US48713365A US3244111A US 3244111 A US3244111 A US 3244111A US 487133 A US487133 A US 487133A US 48713365 A US48713365 A US 48713365A US 3244111 A US3244111 A US 3244111A
- Authority
- US
- United States
- Prior art keywords
- pump
- pair
- rotors
- fluid
- cavity
- 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 - Lifetime
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Classifications
-
- 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
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
Definitions
- This invention relates to fluid pumps in general and more particularly to dual pump units having a common drive power source and reservoir system.
- .it is an object of this invention to provide a pair of rotor pumps having the rotors of each driven by a common motor drive shaft.
- a dual pump assembly comprising a housing having a single cylindrical pump cavity therein, a single drive shaft extending eccentrically into said pump cavity, a pair of inner pump rotors secured to rotate in the pump cavity with the shaft, said pair of inner pump rotors being 3,244,111 Patented Apr.
- FIGURE 1 is a side elevation and partially crosssectioned view, substantially on line 1-1 of FIGURE 4, of the dual fluid pump arrangement provided by this invention showing a single drive motor and fluid reservoir used therewith.
- FIGURE 2 is an enlarged exploded view of the dual pump rotors and annular sealing means.
- FIGURE 3 is an enlarged fragmentary view of the pumping chamber, substantially on line 3-3 of FIG- URE 1.
- FIGURE 4 is a cross-sectional view of the pump assembly shown by FIGURE 1, taken in the plane of line 4-4 thereon and looking in the direction of the arrow-s with the inner rotor members and spacer removed.
- FIGURE 5 is a cross-sectional view of the pump assembly shown by FIGURE 1, as seen in the plane of line 5-5 and looking in the direction of the arrows thereon.
- FIGURE 6 is an enlarged, cross-sectional and fragmentary detail view of a feature of the pump assembly of this invention as seen in the plane of line 6-6 of FIGURE 5 and looking in the direction of thearrows thereon.
- FIGURE 7 is a cross-sectional view of the detailed feature of FIGURE 6 as seen in the plane of line 7-7 thereon and looking in the direction of the arrows.
- FIGURE 8 is an enlarged, cross-sectional and fragmentary view of a modification in the sealing arrangement between the two pump rotors.
- the drawings show a motor and pump assembly 10 which includes a small electrically driven motor 12, which is reversible, connected to one end of a pump assembly 14.
- the pump assembly in turn includes -a chamber housing 16, combination chamber cover and passage member 18, and a fluid reservoir member 20.
- the casing or housing 22 of the motor 12 is secured to the chamber housing member 16 of the pump assembly in any suitable and conventionally known manner and the fluid reservoir member 20 is engaged to the cover or passage member 18 as by a centrally disposed tie bolt 24.
- the pump housing and cover members themselves are engaged together by threaded bolt fasteners 26 extending through the cover member and engaged in tapped holes in the housing member.
- the motor 12 has its shaft 28 extended into the housing member 16 of the pump assembly through a centrally disposed passage 3% including journal bearing means and a suitable seal.
- the shaft extends into a pump chamber space or bore 32 provided in the face of the housing member 16 and which is closed by the cover or passage member 18.
- a pair of rotor type pumps 34 and 36 each of which include an internal and external rotor member identified by the numerals 38 and 40, and 38 and 40, and have the drive shaft 28 of the motor 12 engaged with the internal rotor members.
- the two pumps are co-axially disposed in the common chamber and have a separator 42 provided therebetween.
- the tolerances of the pump parts and separator are such that the one pump 36 has the rotor members thereof seated against the bottom wall of the chamber bore 32 and the rotor members of the other pump 34 seated against the chamber closing part of the cover member 18 with reasonable clearance for free rotation of the rotor parts and without fluid transfer across the ends of the respective pumps.
- the separator 42 itself is freeiy rotatable on the rotor drive shaft 28. It overlaps the chamber spaces 44, FIGS. 3 and 4, between the internal and external rotor members of the two pumps and thereby precludes cross fluid transfer between the pumps. The only relative movement between the separator 42 and the pump parts is very small and the wear factor is accordingly negligible.
- Fluid passages 46 and 48 are provided through the outer side walls of the housing member 16 of the pump assembly, from threaded recesses 50 and 50 for fluid line fittings, and extend radially inward on diametrically opposite sides of the housing towards the shaft passage 30. They intersect and terminate in communication with arcuate slots 51 and 52 provided through the bottom wall of the chamber bore 32 and which are in turn in communication with the chamber spaces 44 between the rotor members of the pump 56.
- fluid passage means just described are in communication with the inlet and outlet sides of the rotor pump 36 and that the different passages serve alternately to supply and carry off fluid circulated by the pump dependent upon the rotational direction imposed by the drive motor 12.
- reservoir connecting passages 54 and 56 are provided in the housing member 16 and are disposed to intersect the inlet and outlet passages 46 and 48 between the ends thereof. These passages are only part of the reservoir connecting passage means and the whole reservoir communicating system is best explained in the subsequent discussion.
- a pair of fluid passages 58 and 60 are provided through diametrically opposite sides of the cover member 18, from threaded recesses 6262' for fittings, and intersect arcuate slots 64 and 66, formed through the pump chamber closing face thereof and aligned with the chamber spaces 44 between the rotor members of the rotor pump 34, in the same manner as the fluid inlet and outlet passage means in the cover member 18.
- reservoir connecting passages 68 and 71 are provided in communication with the passages 58 and 60.
- separator for between the two pumps 34 and 36.
- Such a separator is shown as a wave spring member 72 in FIGURE 8 which is disposed between the two pumps and is and serves in like capacity to the separator 42 previously described, in combination with the washers 74 and 76 closing the pump spaces 44 between the rotor members. It serves the additional advantage of assuring that the rotor members of the pumps are seated against the end wall of the chamber 32 and cover member 18 and that fluid flow across the ends thereof is precluded Without being overly mindful of close tolerances in the pump rotor parts, chamber bore, etc.
- the reservoir connecting passages 54 and 56 of the fluid system for pump 36 and the reservoir connecting passages 68 and for the other pump 34 extend to the adjacently disposed faces of the respective housing and cover members within which provided. Here they are respectively in communication with grooves or channels 78, 80, 82 and 84, formed in the face of the cover member 18 and which provide fluid passage means to a set of reservoir connecting passageways 86, 88, and 92 disposed in respectively close relation through the cover or passage member to the fluid chamber space 94 within the reservoir member 26.
- a check valve housing member 96 is secured to the back side of the cover member 18. It is disposed within the fluid reservoir chamber space 94 and over the ends of the reservoir connecting passageways 86, 88, 90 and 92. However, there are separate ball check chamber spaces 98 and 98 in communication with each of the passageways and which are formed partly in the check valve housing member 96 and partly in the cover member 18. These each include connecting passages Hi0 and 1th? to the reservoir chamber space 9 5 and are formed to provide ball seats for two pairs of ball check valve members 102 and 102' retained therein.
- the reservoir connecting passageways which relate to the same fluid pump system, as passageways 9d and 92 are to the fluid pump 34, have a common rocker arm member 104 for the example given and 106 for the other, which enables only one ball of each set of the ball check members 102-102 to be seated at one time. This assures that the reservoir chamber is open to the inlet side of the pumps but is closed to the outlet side regardless of which of the supply and exhaust passages serves which purpose.
- fluid that is drawn into passage 58 in the course of operating the rotor pump 34 in one rotational direction, will draw any additional fluid needed to replenish a deficiency from the reservoir supply by creating a suction through passage 68, groove or channel 32 and passageway 90 which will unseat its ball check 102 and allow the necessary fluid to pass.
- the pressure side of the pump 34 is in communication through passage 71%, groove or channel 84 and passageway 92 to seat the other ball check of check valve member 102.
- the rocker arm control 164 is activated to assure that the first mentioned ball check is unseated for replenishment supply if required.
- the check valve arrangement provided thus essentially assures that fluid is drawn only as necessary to replenish one of the fluid systems and precludes any transfer between the two pumps through the reservoir member itself.
- a dual pump assembly comprising a housing having a single cylindrical pump cavity therein, a single drive shaft extending eccentrically into said pump cavity, a pair of inner pump rotors secured to rotate in the pump cavity with the shaft, said pair of inner pump rotors being positioned on said shaft in axially spaced relationship, a pair of outer pump rotors positioned in said cavity in axially spaced side by side relationship and radially opposite to said pair of inner pump rotors, cooperating teeth on said inner and outer rotors to provide a drive connection therebetween and to provide a pair of variable volume pump chambers, and freely rotatable annular sealing means journaled on said shaft, said sealing means extending between the pair of inner and outer pump rotors and dividing said cylindrical pump cavity into separate pump chambers and separate pressure fluid supply and exhaust passages for each of said pair of variable volume pump chambers.
- annular sealing means includes a resilient member normally urging said pairs of pump rotors in spaced relationship.
- annular sealing means includes a pair of spaced discs and spring means urging said discs in to sealing engagement with their respective rotors.
- a dual pump assembly comprising a housing having a single cylindrical pump cavity therein, a single drive shaft extending eccentrically into said pump cavity, a
- reversible motor drivably connected to said shaft, a pair of inner pump rotors secured to rotate in the pump cavity with the shaft, said pair of inner pump rotors being positioned on said shaft in axially spaced relationship, a pair of outer pump rotors positioned in said cavity in axially spaced side by side relationship and radially opposite to said pair of inner pump rotors, cooperating teeth on said inner and outer rotors to provide a drive connection therebetween and to provide a pair of variable volume pump chambers, and freely rotatable annular sealing means journaled on said shaft, said sealing means extending between the pair of inner and outer pump rotors and dividing said cylindrical pump cavity into separate pump chambers, and separate pressure fluid supply and exhaust passages for each of said pair of variable volume pump chambers.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US487133A US3244111A (en) | 1965-09-14 | 1965-09-14 | Dual pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US487133A US3244111A (en) | 1965-09-14 | 1965-09-14 | Dual pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US3244111A true US3244111A (en) | 1966-04-05 |
Family
ID=23934542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US487133A Expired - Lifetime US3244111A (en) | 1965-09-14 | 1965-09-14 | Dual pump |
Country Status (1)
Country | Link |
---|---|
US (1) | US3244111A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3370540A (en) * | 1965-12-23 | 1968-02-27 | Gen Motors Corp | Pump construction |
DE2201421A1 (en) * | 1972-01-13 | 1973-07-19 | Zahnradfabrik Friedrichshafen | OIL PUMP WITH OIL RESERVOIR |
US3871798A (en) * | 1972-12-02 | 1975-03-18 | Danfoss As | Rotary and orbiting piston machine with internal shaft |
DE3320596A1 (en) * | 1983-06-08 | 1984-01-05 | Neudecker & Jolitz GmbH & Co KG, 4423 Gescher | Compact motor-pump unit comprising electric motor and externally toothed gear pump complete in one housing |
US4717320A (en) * | 1978-05-26 | 1988-01-05 | White Hollis Newcomb Jun | Gerotor motor balancing plate |
US4960370A (en) * | 1988-04-15 | 1990-10-02 | Frank Obrist | Internal axis rotary piston machine |
DE4106085A1 (en) * | 1991-02-27 | 1992-09-03 | Kloeckner Humboldt Deutz Ag | Lubricating oil pump for IC engine - has housing by pump housing and drive housing halves |
US5215165A (en) * | 1991-02-19 | 1993-06-01 | Atsugi Unisia Corporation | Oil pump |
DE19634822A1 (en) * | 1995-08-29 | 1997-03-06 | Aisin Seiki | Tandem pump hydraulic supply |
US5997262A (en) * | 1997-04-10 | 1999-12-07 | Walbro Corporation | Screw pins for a gear rotor fuel pump assembly |
US6386836B1 (en) * | 2000-01-20 | 2002-05-14 | Eagle-Picher Industries, Inc. | Dual gerotor pump for use with automatic transmission |
WO2003006830A1 (en) * | 2001-07-09 | 2003-01-23 | Valeo Electrical Systems, Inc. | Hydraulic motor system |
US20030154839A1 (en) * | 2000-07-07 | 2003-08-21 | Marko Paakkunainen | Transformer unit |
US20060112907A1 (en) * | 2004-11-26 | 2006-06-01 | Honda Motor Co., Ltd. | Oil pump assembly |
US20060120908A1 (en) * | 2004-12-03 | 2006-06-08 | Hitachi, Ltd. | Tandem type trochoid pump and method of assembling the same |
US20060140790A1 (en) * | 2003-06-16 | 2006-06-29 | Ralf Muehlhausen | G-rotor pump |
US20070224064A1 (en) * | 2005-11-15 | 2007-09-27 | Fipco | Pump Apparatus And Methods For Using Same |
US20100119398A1 (en) * | 2008-11-13 | 2010-05-13 | Simone Orlandi | Gerotor Pump |
US10815991B2 (en) | 2016-09-02 | 2020-10-27 | Stackpole International Engineered Products, Ltd. | Dual input pump and system |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2490115A (en) * | 1942-10-28 | 1949-12-06 | Bendix Aviat Corp | Variable displacement rotary pump |
US2531808A (en) * | 1946-03-27 | 1950-11-28 | Eaton Mfg Co | Pump |
US2790391A (en) * | 1954-11-19 | 1957-04-30 | James W F Holl | Two stage variable delivery vane-type pump |
US2864312A (en) * | 1955-11-21 | 1958-12-16 | Gen Electric | Two-way pump |
US2928243A (en) * | 1958-03-12 | 1960-03-15 | Roper Hydraulics Inc | Pump control system |
US3014429A (en) * | 1959-01-15 | 1961-12-26 | Jabsco Pump Co | Tandem pump |
US3025796A (en) * | 1955-10-03 | 1962-03-20 | Dale O Miller | Gear pump |
US3106163A (en) * | 1960-04-04 | 1963-10-08 | Roper Hydraulics Inc | Pumps, motors and like devices |
-
1965
- 1965-09-14 US US487133A patent/US3244111A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2490115A (en) * | 1942-10-28 | 1949-12-06 | Bendix Aviat Corp | Variable displacement rotary pump |
US2531808A (en) * | 1946-03-27 | 1950-11-28 | Eaton Mfg Co | Pump |
US2790391A (en) * | 1954-11-19 | 1957-04-30 | James W F Holl | Two stage variable delivery vane-type pump |
US3025796A (en) * | 1955-10-03 | 1962-03-20 | Dale O Miller | Gear pump |
US2864312A (en) * | 1955-11-21 | 1958-12-16 | Gen Electric | Two-way pump |
US2928243A (en) * | 1958-03-12 | 1960-03-15 | Roper Hydraulics Inc | Pump control system |
US3014429A (en) * | 1959-01-15 | 1961-12-26 | Jabsco Pump Co | Tandem pump |
US3106163A (en) * | 1960-04-04 | 1963-10-08 | Roper Hydraulics Inc | Pumps, motors and like devices |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3370540A (en) * | 1965-12-23 | 1968-02-27 | Gen Motors Corp | Pump construction |
DE2201421A1 (en) * | 1972-01-13 | 1973-07-19 | Zahnradfabrik Friedrichshafen | OIL PUMP WITH OIL RESERVOIR |
US3871798A (en) * | 1972-12-02 | 1975-03-18 | Danfoss As | Rotary and orbiting piston machine with internal shaft |
US4717320A (en) * | 1978-05-26 | 1988-01-05 | White Hollis Newcomb Jun | Gerotor motor balancing plate |
DE3320596A1 (en) * | 1983-06-08 | 1984-01-05 | Neudecker & Jolitz GmbH & Co KG, 4423 Gescher | Compact motor-pump unit comprising electric motor and externally toothed gear pump complete in one housing |
US4960370A (en) * | 1988-04-15 | 1990-10-02 | Frank Obrist | Internal axis rotary piston machine |
US5215165A (en) * | 1991-02-19 | 1993-06-01 | Atsugi Unisia Corporation | Oil pump |
DE4106085A1 (en) * | 1991-02-27 | 1992-09-03 | Kloeckner Humboldt Deutz Ag | Lubricating oil pump for IC engine - has housing by pump housing and drive housing halves |
DE19634822A1 (en) * | 1995-08-29 | 1997-03-06 | Aisin Seiki | Tandem pump hydraulic supply |
US5997262A (en) * | 1997-04-10 | 1999-12-07 | Walbro Corporation | Screw pins for a gear rotor fuel pump assembly |
US6386836B1 (en) * | 2000-01-20 | 2002-05-14 | Eagle-Picher Industries, Inc. | Dual gerotor pump for use with automatic transmission |
US20030154839A1 (en) * | 2000-07-07 | 2003-08-21 | Marko Paakkunainen | Transformer unit |
US7114537B2 (en) * | 2000-07-07 | 2006-10-03 | Plustech Oy | Transformer unit |
US6612822B2 (en) | 2001-07-09 | 2003-09-02 | Valeo Electrical Systems, Inc. | Hydraulic motor system |
WO2003006830A1 (en) * | 2001-07-09 | 2003-01-23 | Valeo Electrical Systems, Inc. | Hydraulic motor system |
US20060140790A1 (en) * | 2003-06-16 | 2006-06-29 | Ralf Muehlhausen | G-rotor pump |
US7591637B2 (en) * | 2003-06-16 | 2009-09-22 | Siemens Aktiengesellschaft | G-rotor pump |
US7942645B2 (en) * | 2004-11-26 | 2011-05-17 | Honda Motor Co., Ltd. | Oil pump assembly |
US20060112907A1 (en) * | 2004-11-26 | 2006-06-01 | Honda Motor Co., Ltd. | Oil pump assembly |
US20060120908A1 (en) * | 2004-12-03 | 2006-06-08 | Hitachi, Ltd. | Tandem type trochoid pump and method of assembling the same |
US7290995B2 (en) * | 2004-12-03 | 2007-11-06 | Hitachi, Ltd. | Tandem type trochoid pump and method of assembling the same |
US20070224064A1 (en) * | 2005-11-15 | 2007-09-27 | Fipco | Pump Apparatus And Methods For Using Same |
EP2187057A1 (en) * | 2008-11-13 | 2010-05-19 | CNH Italia S.p.A. | Gerotor pump |
US20100119398A1 (en) * | 2008-11-13 | 2010-05-13 | Simone Orlandi | Gerotor Pump |
US10815991B2 (en) | 2016-09-02 | 2020-10-27 | Stackpole International Engineered Products, Ltd. | Dual input pump and system |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TA ACQUISITION CORP. SOUTHFIELD, MI A CORP. OF CA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DURA CORPORATION A NY CORP.;REEL/FRAME:004011/0573 Effective date: 19820212 |
|
AS | Assignment |
Owner name: DURA CORPORATION 26877 NORTHWEST HIGHWAY BOX 267, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DURA CORPORATION, A NY CORP.;REEL/FRAME:004049/0796 Effective date: 19820917 |
|
AS | Assignment |
Owner name: DURA CORPORATION, 26877 NORTHWEST HIGHWAY, BOX 267 Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DURA CORPORATION, A CORP OF CA.;REEL/FRAME:004661/0877 Effective date: 19830815 Owner name: DURA CORPORATION, A CORP OF MI., MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DURA CORPORATION, A CORP OF CA.;REEL/FRAME:004661/0877 Effective date: 19830815 |