US3804562A - Rotary machine with rotor axial positioning means - Google Patents

Rotary machine with rotor axial positioning means Download PDF

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Publication number
US3804562A
US3804562A US00295703A US29570372A US3804562A US 3804562 A US3804562 A US 3804562A US 00295703 A US00295703 A US 00295703A US 29570372 A US29570372 A US 29570372A US 3804562 A US3804562 A US 3804562A
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United States
Prior art keywords
rotary machine
bearing
rotor
inner race
stub shaft
Prior art date
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Expired - Lifetime
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US00295703A
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English (en)
Inventor
G Hansson
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Atlas Copco AB
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Atlas Copco AB
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Publication date
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
    • F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F01C1/3441—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F01C1/3442—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/102—Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
    • F16C19/548—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06—Ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • F16C25/08—Ball or roller bearings self-adjusting
    • F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/52—Bearings for assemblies with supports on both sides
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/56—Bearing bushings or details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/40—Clamping arrangements where clamping parts are received in recesses of elements to be connected
    • F16B2200/403—Threaded clamping parts

Definitions

  • Int Cl F01 c 21/00 F16: 13/00 F64: 15/00 rotor has two stub shafts rotatably supported in the [58] Fie'ld 418/131 134 135 housing by means of ball bearings.
  • a pile of Belleville 418/107 30/189A springs are braced between a shonider on one of the 403/259 6 stub shafts and its associated bearing so as to bias the rotor into an axial position defined by a counterbal- [56]
  • References Cited ancing ring that is adjustably attached to the other f UNITED STATES PATENTS stub sha t by means of a set screw 3,429,228 2/1969 Stoica 418/107 14 Claims, 4 Drawing Figures RATENTEDAPR 16 I974 SHEET 1 (IF ROTARY MACHINE WITH ROTOR AXIAL POSITIONING MEANS
  • This invention relates to a rotary machine particularly but not exclusively of the type provided with vanes, for instance a vane motor, a vane pump or a vane compressor with a housing and a rotor which has two opposite stub shafts journalled by roller or ball bearings in the housing, the outer races of the roller or ball bearings being
  • the rotor can either be axially fixed in a position between its axial end positions or be axially freely movable between the end positions.
  • the distance between the end positions i.e., the total axial clearance, is for instance 0.06 mm.
  • An axially fixed rotor is preferable considering the wear. Furthermore, if the rotor can be fixed in a position which gives about the same clearance on both sides, a considerably reduced leakage is obtained.
  • a rotary machine comprising a housing, a rotor with two opposite stub shafts each being journalled in the housing by means of a bearing with an outer race and an inner race and rolling elements, the outer races of the bearings being axially supported in the housing and the rotor having narrow axial clearances to the housing, a spring braced between a shoulder on one of the stub shafts and the inner race of one of the bearings so as to apply an axial load to the rotor and an element axially adjustably attached to the other of the stub shafts and abutting against the inner race of the other bearing so as to take up and transmit to this inner race the axial load applied to the rotor by the spring whereby to hold the rotor in an axially fixed position.
  • FIG. 1 is a longitudinal section along line 1-1 in FIG. 2 through an air pressure driven vane motor in accordance with the invention
  • FIG. 2 is a cross section along line 2--2 in FIG. 1
  • FIG. 3 is a longitudinal section through a detail shown in view in FIG. 1
  • FIG. 4 is a longitudinal section similar to FIG. 1 through a modified embodiment.
  • the vane motor shown in the FIGS. 1-3 has a housing with a cylindrical part 11 and two end plates 12,13 screwed together in order to define a cylinder chamber. Instead of being directly screwed together the parts 1 1,12,13 can be clamped together by means of an outer housing not illustrated.
  • a rotor 16 has two stub shafts 17,18 and a number of grooves 19 for vanes 20.
  • a ball bearing comprising an outer race 22, an inner race 23 and balls 21, is moved onto the shaft 17 so that the outer race is radially as well as axially supported in the end plate 12.
  • a ball'bearing for the stub shaft 18 is mounted in the end plate 13.
  • This bearing comprises an outer race 25, an inner race 26 and balls 24.
  • the shaft 17 is provided with a groove in which a split snap ring 27 is mounted. Two Belleville springs 28,29 are braced between the snap ring 27 and the inner race 23 of the bearing 21,22,23.
  • balls 21 of the bearing will transmit the force of the springs from the inner race 23 to the outer race 22.
  • the latter is axially supported in the end plate 12 and thus, the springs bias the rotor 16 towards the end plate 12, i.e., to the left in FIG. 1.
  • a ring or washer 30 is axially supported by the inner race 26 of the other bearing 24,25,26 and by means of a set screw 31, the rotor 16 can be pulled against the end plate 13, i.e. to the right in FIG. 1, against the action of the springs 28,29.
  • the stub shaft 18 and the washer 30 are shown in section.
  • the washer 30 and the set screw 31 will be mounted as the last part.
  • the set screw 31 is first given a coat of a glue or of any other hardening fluid or substance, for instance an anaerob plastic, and the set screw is screwed to the position in which the rotor 16 easily can be rotated manually, i.e., until the axial force between the rotor 16 and the end plate 12 of the housing starts decreasing but the rotor still abuts the end plate.
  • the angular position of the set screw 31 is now indicated and the screw is turned until it begins to be difficult to rotate the rotor manually again, i.e., until the rotor instead abuts the other end plate 13 of the housing.
  • the Belleville springs 28,29 are for instance selected to give a spring force of about 20 kp for a rotor diameter of 50 mm. Thereby, a very close sliding fit can be permitted between the stub shafts 17,18 and the inner races 23,26 of the bearings so that the wear between the stub shafts and the inner races will be almost eliminated. Still, the springs 28,29 will be strong enough to axially displace the rotor in the inner races of the bearings. The fact that the bearings constantly are axially loaded by such a great force as, for instance, 20 kp has no negative influence on their durability.
  • the rotor 16 is clamped between the inner sides of the inner races 23,26 of the two bearings instead of between the outer sides.
  • the outer races 22,25 of the bearings have such a tight fit (i.e., press fit) that they will remain fixed in the end plates 12,13 of the housing in spite of the fact that they are loaded outwards by means of the spring 28,29.
  • a shoulder 27 on the stub shaft 17 corresponds to the snap ring 27 and the other elments of FIG. 4 corresponding to elements in FIGS. 1-3 have also been given the same reference numerals as in FIGS. 1-3.
  • a rotary machine comprising:
  • a rotor with two opposite stub shafts each of said stub shafts being journalled in the housing by means of a bearing with an outer race, an inner race and rolling elements, the outer races of the bearings being axially supported in the housing and the rotor having narrow axial clearances to the housing,
  • an adjusting means axially adjustably attached to the other of the stub shafts and abutting against the inner race of the other bearing so as to take up and transmit to the inner race of said other bearing the axial load applied to the rotor by the spring whereby to hold the rotor in an axially fixed position which is defined by the position of said adjusting means on said other stub shaft.
  • a rotary machine as defined in claim 1 in which said shoulder is arranged on the outside of said one bearing and said spring is braced between said shoulder and the outer side of the inner race of the bearing associated therewith, said adjusting means abutting against the outer side of the inner race of the other bearing.
  • a rotary machine as defined in claim 1 in which said rotor is provided with a number of substantially radial grooves in which vanes are disposed to seal with their outer protruding edges against a cylindrical wall formed in the housing, said cylindrical wall and said vanes forming expansible chambers.
  • a rotary machine as defined in claim 6 comprising a binding layer for locking the threads of said set screw in the stub shaft.
  • a rotary machine as defined in claim 9 in which said spring comprises a plurality of cooperating Belleville spring.
  • a rotary machine as defined in claim 1 in which said shoulder is arranged on the inside of said one bearing and said spring is braced between said shoulder and the inner side of the inner race of the bearing associated therewith, said adjusting means abutting against the inner side of the inner race of the other bearing.
  • a rotary machine as defined in claim 11 wherein said adjusting means comprises a first element axially slideably engaging said other stub shaft and abutting the inner side of the inner race of said other bearing, and a set screw adjusting the axial position of said first element relative to said other stub shaft.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Support Of The Bearing (AREA)
US00295703A 1971-10-14 1972-10-06 Rotary machine with rotor axial positioning means Expired - Lifetime US3804562A (en)

Applications Claiming Priority (1)

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SE1300271T 1971-10-14

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US3804562A true US3804562A (en) 1974-04-16

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US (1) US3804562A (enrdf_load_stackoverflow)
DE (1) DE2250003C3 (enrdf_load_stackoverflow)
FR (1) FR2157353A5 (enrdf_load_stackoverflow)
GB (1) GB1355273A (enrdf_load_stackoverflow)
IT (1) IT966331B (enrdf_load_stackoverflow)
SE (1) SE357799B (enrdf_load_stackoverflow)

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033644A (en) * 1975-07-19 1977-07-05 Ford Motor Company Method for preloading bearing
US4435140A (en) 1980-12-16 1984-03-06 Nippon Soken, Inc. Compressor having rotor rotating without contracting side plates
US4465446A (en) * 1983-05-11 1984-08-14 Frick Company Radial and thrust bearing mountings providing independent loading
US4636668A (en) * 1983-07-04 1987-01-13 Citizen Watch Co., Ltd. Compact-sized permanent magnet type stepping motor
US4695102A (en) * 1984-11-30 1987-09-22 Societa' Italtractor Meccanica Itm S.P.A. Lubricated roller for the tracks of crawler vehicles, in particular, a top roller with fixed overhung shaft and rolling bearings
US4714355A (en) * 1985-03-12 1987-12-22 Danieli & C. Officine Meccanichi Spa Compensating device for rolling stands with rolls supported at only one end
US4798560A (en) * 1985-02-19 1989-01-17 General Motors Corporation Unitized wheel bearing assembly
US4898524A (en) * 1989-01-27 1990-02-06 Snap-On Tools Corporation Fluid driven rotary motor
US5000589A (en) * 1989-06-30 1991-03-19 Kabushiki Kaisha Sankyo Seiki Seisakusho Bearing structures for motors
US5018898A (en) * 1988-12-05 1991-05-28 Skf (Uk) Limited Preventing movement of an article along a shaft
US5163825A (en) * 1991-04-03 1992-11-17 Oetting Roy E Articulated vane fluid driven motor
EP0692633A1 (en) 1994-07-14 1996-01-17 CASAPPA S.p.A. A gear pump
US5571004A (en) * 1995-10-02 1996-11-05 Thomas Industries Inc. Sliding vane rotor attachment
US5624193A (en) * 1995-01-17 1997-04-29 Valeo Equipements Electriques Moteur Ball or roller bearing assembly, in particular a back bearing assembly for a motor vehicle alternator
US5664941A (en) * 1995-12-22 1997-09-09 Zexel Usa Corporation Bearings for a rotary vane compressor
US6107717A (en) * 1999-06-07 2000-08-22 Delta Electronics, Inc. Motor structure having bearing preload assembly
US6158898A (en) * 1999-04-14 2000-12-12 National Science Council Preloading regulating mechanism for rolling bearings
US6412280B1 (en) * 2000-05-11 2002-07-02 Thermal Dynamics, Inc. Fluid motor
US20020114551A1 (en) * 2001-02-01 2002-08-22 Lars Andren Precision spindle unit for low friction performance
US6462441B1 (en) * 2001-02-14 2002-10-08 Sunonwealth Electric Machine Industry Co., Ltd. Rotor assembly of brushless direct current motor
US6481917B1 (en) 2000-05-02 2002-11-19 Honeywell International Inc. Tie-boltless shaft lock-up mechanism
US6490863B1 (en) 2001-06-11 2002-12-10 Thermal Dynamics, Inc. Compressor cycle apparatus
US6540406B1 (en) * 1999-11-19 2003-04-01 Minebea Co., Ltd. Double row bearing
US6606857B1 (en) 2002-02-28 2003-08-19 Thermal Dynamics, Inc. Fluid actuated generator
US6616433B1 (en) 2001-12-06 2003-09-09 Thermal Dynamics, Inc. Fluid pump
US6663370B1 (en) 2001-06-11 2003-12-16 Thermal Dynamics, Inc. Condenser motor
US20040013554A1 (en) * 2000-08-31 2004-01-22 Mats Stellnert Vacuum pump
US6688869B1 (en) 2002-09-11 2004-02-10 Thermal Dynamics, Inc. Extensible vane motor
US6784559B1 (en) 2002-02-28 2004-08-31 Thermal Dynamics, Inc. Fluid pressure regulator assembly with dual axis electrical generator
US6843436B1 (en) 2002-09-11 2005-01-18 Thermal Dynamics, Inc. Chopper pump
US6905322B1 (en) 2002-09-24 2005-06-14 Thermal Dynamics, Inc. Cam pump
US20070144466A1 (en) * 2003-12-19 2007-06-28 Josef Beck Piston engine, shaft and rolling bearing for a piston engine
US20080282820A1 (en) * 2007-05-14 2008-11-20 Ingersoll Rand Company Balanced bearing assembly
CN102905955A (zh) * 2010-05-25 2013-01-30 Zf操作系统有限公司 循环滚珠式传动装置
US9222517B1 (en) * 2014-11-26 2015-12-29 Bradford Christopher King Tapered bearing system to minimize shaft damage and component failure
US20190022810A1 (en) * 2017-07-24 2019-01-24 Fanuc Corporation Motor with shaft movable in limited manner, and machine tool
CN109458225A (zh) * 2018-10-31 2019-03-12 延边龙川包装机械有限公司 叶片式气马达转子两侧与前后端盖之间间隙的调整装置
EP3613945A1 (en) * 2018-08-24 2020-02-26 Tatsuno Corporation Displacement pump
DE102021133718A1 (de) 2021-12-17 2023-06-22 Vemag Maschinenbau Gmbh Pumpe für eine Füllmaschine mit einer Lagereinheit
US20240035470A1 (en) * 2021-04-28 2024-02-01 Schaeffler Technologies AG & Co. KG Electric-motor-driven hydraulic pump actuator

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FR2651280A1 (fr) * 1989-08-28 1991-03-01 Cit Alcatel Pompe a vide primaire.
US5391065A (en) * 1993-10-26 1995-02-21 Ingersoll-Rand Company Parallel adjustment assembly for a scroll compressor

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US1994786A (en) * 1934-02-14 1935-03-19 Fuller Co Compressor and vacuum pump
US2762340A (en) * 1952-09-17 1956-09-11 Earl G Roggenburk Rotary fluid motor
FR1308375A (fr) * 1961-12-20 1962-11-03 Licentia Gmbh Pompe à engrenages
US3309965A (en) * 1964-02-27 1967-03-21 Ritter Pfaudler Corp Combined fluid motor and speed reducer for driving dental tools
US3429228A (en) * 1966-11-30 1969-02-25 Smith Corp A O Friction-free fluid meter
US3719440A (en) * 1971-04-16 1973-03-06 Dotco Inc Air operated tool

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US1730145A (en) * 1926-04-16 1929-10-01 Lamson Co Refrigerating apparatus
US1994786A (en) * 1934-02-14 1935-03-19 Fuller Co Compressor and vacuum pump
US2762340A (en) * 1952-09-17 1956-09-11 Earl G Roggenburk Rotary fluid motor
FR1308375A (fr) * 1961-12-20 1962-11-03 Licentia Gmbh Pompe à engrenages
US3309965A (en) * 1964-02-27 1967-03-21 Ritter Pfaudler Corp Combined fluid motor and speed reducer for driving dental tools
US3429228A (en) * 1966-11-30 1969-02-25 Smith Corp A O Friction-free fluid meter
US3719440A (en) * 1971-04-16 1973-03-06 Dotco Inc Air operated tool

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033644A (en) * 1975-07-19 1977-07-05 Ford Motor Company Method for preloading bearing
US4435140A (en) 1980-12-16 1984-03-06 Nippon Soken, Inc. Compressor having rotor rotating without contracting side plates
US4465446A (en) * 1983-05-11 1984-08-14 Frick Company Radial and thrust bearing mountings providing independent loading
US4636668A (en) * 1983-07-04 1987-01-13 Citizen Watch Co., Ltd. Compact-sized permanent magnet type stepping motor
US4695102A (en) * 1984-11-30 1987-09-22 Societa' Italtractor Meccanica Itm S.P.A. Lubricated roller for the tracks of crawler vehicles, in particular, a top roller with fixed overhung shaft and rolling bearings
US4798560A (en) * 1985-02-19 1989-01-17 General Motors Corporation Unitized wheel bearing assembly
US4714355A (en) * 1985-03-12 1987-12-22 Danieli & C. Officine Meccanichi Spa Compensating device for rolling stands with rolls supported at only one end
US5018898A (en) * 1988-12-05 1991-05-28 Skf (Uk) Limited Preventing movement of an article along a shaft
US4898524A (en) * 1989-01-27 1990-02-06 Snap-On Tools Corporation Fluid driven rotary motor
US5000589A (en) * 1989-06-30 1991-03-19 Kabushiki Kaisha Sankyo Seiki Seisakusho Bearing structures for motors
US5163825A (en) * 1991-04-03 1992-11-17 Oetting Roy E Articulated vane fluid driven motor
EP0692633A1 (en) 1994-07-14 1996-01-17 CASAPPA S.p.A. A gear pump
US5624193A (en) * 1995-01-17 1997-04-29 Valeo Equipements Electriques Moteur Ball or roller bearing assembly, in particular a back bearing assembly for a motor vehicle alternator
US5571004A (en) * 1995-10-02 1996-11-05 Thomas Industries Inc. Sliding vane rotor attachment
US5664941A (en) * 1995-12-22 1997-09-09 Zexel Usa Corporation Bearings for a rotary vane compressor
US6158898A (en) * 1999-04-14 2000-12-12 National Science Council Preloading regulating mechanism for rolling bearings
US6107717A (en) * 1999-06-07 2000-08-22 Delta Electronics, Inc. Motor structure having bearing preload assembly
US6540406B1 (en) * 1999-11-19 2003-04-01 Minebea Co., Ltd. Double row bearing
US6481917B1 (en) 2000-05-02 2002-11-19 Honeywell International Inc. Tie-boltless shaft lock-up mechanism
US6412280B1 (en) * 2000-05-11 2002-07-02 Thermal Dynamics, Inc. Fluid motor
US6835055B2 (en) * 2000-08-31 2004-12-28 Delaval Holding Ab Rotary vane vacuum pump having a rotor axial seal and an axially bias rotor-drive shaft combination
US20040013554A1 (en) * 2000-08-31 2004-01-22 Mats Stellnert Vacuum pump
US20020114551A1 (en) * 2001-02-01 2002-08-22 Lars Andren Precision spindle unit for low friction performance
US6623166B2 (en) * 2001-02-01 2003-09-23 Aktiebolaget Skf Precision spindle unit for low friction performance
US6462441B1 (en) * 2001-02-14 2002-10-08 Sunonwealth Electric Machine Industry Co., Ltd. Rotor assembly of brushless direct current motor
US6490863B1 (en) 2001-06-11 2002-12-10 Thermal Dynamics, Inc. Compressor cycle apparatus
US6663370B1 (en) 2001-06-11 2003-12-16 Thermal Dynamics, Inc. Condenser motor
US6616433B1 (en) 2001-12-06 2003-09-09 Thermal Dynamics, Inc. Fluid pump
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Also Published As

Publication number Publication date
DE2250003A1 (de) 1973-04-19
GB1355273A (en) 1974-06-05
IT966331B (it) 1974-02-11
DE2250003C3 (de) 1980-03-06
FR2157353A5 (enrdf_load_stackoverflow) 1973-06-01
DE2250003B2 (de) 1979-06-28
SE357799B (enrdf_load_stackoverflow) 1973-07-09

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