With Lubrication Patents (Class 418/206.8)
  • Patent number: 9028233
    Abstract: A rotary piston pump equipped with a motor having two counter-rotating rotary pistons. The two rotary pistons are housed in an oval pump housing. The two rotary pistons are arranged on a first output shaft and a second output shaft. The first output shaft and the second output shaft are driven and synchronized via at least one elastic element.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: May 12, 2015
    Assignee: NETZSCH-Pumpen & Systeme GmbH
    Inventors: Hans Juergen Linde, Bernhard Murrenhoff, Robert Kurz, Reinhard Denk, Josef Strassl, Thomas Boehme, Hisham Kamal, Stefan Weigl, Roger Willis, Stefan Kern, Johann Kreidl, Gunter Herr, Franz Kneidl, Mikael Tekneyan, Erwin Weber, Marcel Verhoeven, Mathias Gradl, Udo Enderle
  • Patent number: 8992192
    Abstract: A shaft assembly includes a gear with a gear bore having a splined bore section adjacent to an oil dam. A shaft includes a first splined end section and a second splined end section, the first splined end section engageable with the splined inner diameter, the shaft having a bore with a bore diameter greater than a diameter of the oil dam, a first set of radial apertures axially inboard of the first splined end section in communication with the shaft inner bore and a second set of radial apertures axially inboard of the second splined end section in communication with the shaft inner bore that altogether provide lubrication of the splined end sections.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: March 31, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Satish Shantilal Shah, Michael R. Blewett, Timothy P. Walgren, Michael Moorman
  • Patent number: 8992193
    Abstract: An input shaft assembly is movable along an axis to absorb external impact loads. A biasing member exerts an axial load in a direction counter to potential impact loads. A stop is provided to control the application of biasing loads to control application of such axial load.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: March 31, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Timothy P. Walgren, Steven A. Heitz
  • Publication number: 20150037194
    Abstract: An oil pump has a pump body, an outer rotor, and an inner rotor. The pump body includes a rotor chamber, an inlet port and an outlet port formed in the rotor chamber, an inlet passage communicating with the inlet port, an outlet passage communicating with the outlet port, a relief valve, a relief chamber formed on a discharge side of the relief valve, and an oil return passage formed from the relief chamber to the inlet passage. The outer rotor is supported by the inner circumferential support wall of the rotor chamber. The oil return passage is formed in the inner circumferential support wall as a groove-like recess and opens along an outer circumferential surface of the outer rotor.
    Type: Application
    Filed: July 16, 2014
    Publication date: February 5, 2015
    Inventors: Yasuhiko Kan, Hiroyuki Taguchi, Sentaro Nishioka
  • Patent number: 8932033
    Abstract: A positive displacement pump is provided. The pump includes a housing, and first and second meshed rotors rotatably disposed in the housing and arranged to transform relatively low-pressure inlet port air into relatively high-pressure outlet port air. The pump additionally includes first and second meshed timing gears fixed relative to the first and second rotors, respectively, for preventing contact between the first and second rotors, and sufficiently enclosed to generate a flow of lubricating fluid. Furthermore, the blower includes an input drive adapted to be rotatably driven at speeds proportional to speeds of an internal combustion engine and arranged to drive the first and second timing gears.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: January 13, 2015
    Assignee: Eaton Corporation
    Inventor: Daniel R. Ouwenga
  • Patent number: 8911222
    Abstract: A shaft assembly includes a shaft with a first radial shoulder and a second radial shoulder. A retainer plate is located at least partially between the first radial shoulder and the second radial shoulder to avoid damage when an impact load is applied to the shaft. A spring assembly biases the shaft out of contact with the retainer plate during operation.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: December 16, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Timothy P. Walgren, Satish Shantilal Shah, Steven A. Heitz
  • Patent number: 8801410
    Abstract: A coupling shaft assembly includes a coupling shaft with a first radial shoulder and a second radial shoulder, the first radial shoulder and the second radial shoulder each include at least one slot to provide a lubricant flow path.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: August 12, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Satish Shantilal Shah, Timothy P. Walgren
  • Patent number: 8708678
    Abstract: A nonmetallic pump with a gear pump assembly having an adapter spool mounted to an electric motor. The pump assembly is designed to reduce manufacturing costs and to provide access for many service and maintenance tasks to be performed without breaking any of the pipe connections. The pump assembly also includes a splined shaft system and a lubricating fluid circulation system with spiral grooves located inside a pair of bearings disposed on opposite sides of the gear flights. The assembly also includes a replaceable precision liner that surrounds the gear flights to maintain a tight tolerance for optimal performance of the pump. Also, an O-ring disposed inside the front cover of the assembly provides for operation of the pump over a wide temperature variation with relatively loose manufacturing tolerances.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: April 29, 2014
    Assignee: Pulsafeeder, Inc.
    Inventors: Stephen B. Muscarella, Philip T. Pascoe
  • Patent number: 8608465
    Abstract: Positive-displacement auxiliary pumping systems for use in pump apparatus of different configurations are disclosed. The positive-displacement auxiliary pumping systems are included in positive-displacement rotary pumps having a casing defining a pumping cavity, an inlet port connected to the pumping cavity, a discharge port connected to the pumping cavity, and a positive-displacement auxiliary pumping port connected to the pumping cavity. Pumping elements move within the pumping cavity of the casing and define a collapsing pocket that maintains fluid communication with the positive-displacement auxiliary pumping port after the collapsing pocket is no longer in fluid communication with the discharge port.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: December 17, 2013
    Assignee: Peopleflo Manufacturing, Inc.
    Inventor: Jason M. Sexton
  • Patent number: 8529231
    Abstract: An apparatus includes a rotation body having one or more rotary shafts having projections, and a cleaning part disposed adjacent to the projections, having one or more rotation holes into which the one or more rotary shafts are inserted, respectively, and configured to flow a cleaning material into the one or more rotation holes.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: September 10, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tea-Jin Park
  • Patent number: 8500424
    Abstract: In order to improve a screw compressor comprising an outer housing, a compressor screw housing which is arranged in the outer housing and in which rotor bores for screw rotors are arranged, a drive arranged in the outer housing on one side of the compressor screw housing, a bearing housing arranged in the outer housing on a side of the compressor screw housing located opposite the drive and a sound damping device which is arranged within the outer housing and has compressed working medium flowing through it, in such a manner that the working medium leaving the screw compressor carries as little lubricant as possible along with it, it is suggested that the sound damping device guide the compressed working medium by means of a flow guide in an interior space as a circulating flow circulating around an axis and that lubricant be separated from the circulating flow of the working medium as a result of centrifugal forces.
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: August 6, 2013
    Assignee: Bitzer Kuehlmaschinenbau
    Inventors: Klaus Feller, Roni Loerch
  • Patent number: 8454334
    Abstract: A compressor system includes a lubricant reservoir, a screw compressor, and a valve. The screw compressor includes a housing defining a compression chamber having a suction port, a discharge port, a first lubricant feed port located between the suction port and the discharge port, and a second lubricant feed port located between the discharge port and the first lubricant feed port. The valve is in fluid communication with the lubricant reservoir, the first lubricant feed port via a first lubricant feed passageway, and the second lubricant feed port via a second lubricant feed passageway. The valve is movable between a first position and a second position. In the first position, the valve fluidly connects the lubricant reservoir to the first lubricant feed passageway to direct lubricant to the first lubricant feed port. In the second position, the valve fluidly connects the lubricant reservoir to the second lubricant feed passageway to direct lubricant to the second lubricant feed port.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: June 4, 2013
    Assignee: Trane International Inc.
    Inventors: Joseph Heger, Robert Mayfield
  • Patent number: 8439661
    Abstract: A power take-off for compressors, comprising: a first rotating element (2), predisposed to be connected on command to a motor (40); at least a second rotating element (3), kinematically connected to the first rotating element (2), which is predisposed to be connected to a first user (50); a torque limiter or clutch (4), interposed between the first rotating element (2) and the second rotating element (3).
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: May 14, 2013
    Assignee: Interpump Hydraulics S.p.A.
    Inventors: Silvano Prampolini, Luca Munerati
  • Patent number: 8303281
    Abstract: A high performance gear type oil pump for an internal combustion engine which has drive and driven gears which are, on one common side of the gears, respectively supported from the housing by a drive shaft and an idler shaft. In order to avoid cantilevering of the gears when generating pressurized oil, the other common side of the gears are each rotatable mounted on stub axles or pins which themselves are fixedly attached to the housing. In order to minimize wear, oil under pressure is supplied to the bearing surfaces of stub axles or pins which extend interiorly of the gears and also to the bearing surfaces of the housing which faces the common side of the gears where the stub axles are located, through oil supply passageways in the stub axles or pins.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: November 6, 2012
    Assignee: Clay Valley Holdings Inc.
    Inventor: Bruce Robillard
  • Publication number: 20120207634
    Abstract: A compressor system includes a lubricant reservoir, a screw compressor, and a valve. The screw compressor includes a housing defining a compression chamber having a suction port, a discharge port, a first lubricant feed port located between the suction port and the discharge port, and a second lubricant feed port located between the discharge port and the first lubricant feed port. The valve is in fluid communication with the lubricant reservoir, the first lubricant feed port via a first lubricant feed passageway, and the second lubricant feed port via a second lubricant feed passageway. The valve is movable between a first position and a second position. In the first position, the valve fluidly connects the lubricant reservoir to the first lubricant feed passageway to direct lubricant to the first lubricant feed port. In the second position, the valve fluidly connects the lubricant reservoir to the second lubricant feed passageway to direct lubricant to the second lubricant feed port.
    Type: Application
    Filed: February 10, 2011
    Publication date: August 16, 2012
    Inventors: Joseph Heger, Robert Mayfield
  • Patent number: 8113803
    Abstract: A lubricating pump having a first stage and a second stage; the first stage in turn has an intake connectable hydraulically to a tank of lubricating fluid, and a delivery outlet connectable hydraulically to a lubricated member; the first stage compresses the lubricating fluid from the tank to a pressure for supply to the member; the second stage in turn has an inlet connectable hydraulically to a casing housing the member, and an outlet connectable hydraulically to the tank; the second stage feeds the lubricating fluid in the casing back into the tank; the second stage is a Roots type, and has a first and a second rotor rotating about respective axes to feed the lubricating fluid from the inlet to the outlet; and the first and second rotor are operated by the first stage.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: February 14, 2012
    Assignee: Agusta S.p.A.
    Inventors: Dario Colombo, Giuseppe Gasparini
  • Patent number: 8083507
    Abstract: Provided is a vacuum pump having a rotation body cleaning unit. The vacuum pump includes a case provided with rotation guide holes at opposite end parts. The case includes a rotation body placed inside the case and including a rotation shaft having opposite ends rotatably supported by the rotation guide holes and a number of lobes provided in the rotation shaft at predetermined intervals. Further, a cleaning part is supported by the case and placed in a space between the lobes and cleans the rotation body.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: December 27, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tea-Jin Park, Seung-Ki Chae, Kwang-Myung Lee, Sang-Gon Lee
  • Publication number: 20110223049
    Abstract: A fuel pump is disclosed, especially a prefeed pump for feeding aircraft fuel to the high pressure pump, wherein the form-fit connection between the drive shaft (4) and the driven impeller (2) is produced by a regular, convex, triangular polygonal contour having rounded-off lateral faces and corner faces, the drive shaft and the impeller being provided with the polygonal contour. In this manner, the wear resulting from the poor lubricating power of the kerosene-based aircraft fuel can be reduced and the service life of the fuel pump can be increased.
    Type: Application
    Filed: November 13, 2009
    Publication date: September 15, 2011
    Applicant: THIELERT AIRCRAFT ENGINES GMBH
    Inventor: Carsten Rudolph
  • Patent number: 8007264
    Abstract: An improved positive displacement rotary pump apparatus and method is provided. The pump may include a front cover, a rotor body forming a chamber with the front cover, a gear case supporting a pair of hollow drive shafts, and a pair of rotors disposed in the chambers and each detachably mounted to one end of a respective hollow drive shaft via a stud that extends from the rotor through the hollow shaft to a fastener.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: August 30, 2011
    Assignee: SPX Corporation
    Inventors: Van Norman J. Drew, Hagen Curt
  • Patent number: 7946834
    Abstract: A balance shaft module according to the present invention includes a first balance shaft equipped with a first eccentric balance weight, a second balance shaft equipped with a second eccentric balance weight, and a hydraulic pump that is operated by the first balance shaft and the second balance shaft, wherein the hydraulic pump includes a first gear equipped on the first balance shaft and a second gear equipped on the second balance shaft and externally meshed with the first gear.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: May 24, 2011
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Myung Rae Cho, Jin Woo Cho, Woo Tae Kim, Hong Wook Lee, Min Sig Shin
  • Patent number: 7806673
    Abstract: A nonmetallic pump with a gear pump assembly having an adapter spool mounted to an electric motor. The pump assembly is designed to reduce manufacturing costs and to provide access for many service and maintenance tasks to be performed without breaking any of the pipe connections. The pump assembly also includes a splined shaft system and a lubricating fluid circulation system with spiral grooves located inside a pair of bearings disposed on opposite sides of the gear flights. The assembly also includes a replaceable precision liner that surrounds the gear flights to maintain a tight tolerance for optimal performance of the pump. Also, an O-ring disposed inside the front cover of the assembly provides for operation of the pump over a wide temperature variation with relatively loose manufacturing tolerances.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: October 5, 2010
    Assignee: Pulsafeeder, Inc.
    Inventors: Stephen B. Muscarella, Philip T. Pascoe
  • Publication number: 20100233006
    Abstract: A vacuum pump includes rotary shafts connected to a pair of screw-type rotors, respectively, and a pair of shaft retainers extending in the housing. Each shaft retainer supports the corresponding rotary shaft by means of a proximal bearing portion and a distal bearing portion. Each pair of the proximal and distal bearing portions are fixed in the axial direction with respect to the corresponding rotary shaft and shaft retainer. Lubricant oil is stored in an oil storage space in a gear case attached to the housing. A cooling water passage through which cooling water to cool the lubricant oil passes is formed in the gear case. A controller controls the flow rate of the cooling fluid, so that the temperature of the lubricant oil in the oil storage space is kept constant. With this configuration, when the bearing portions are fixed in the axial direction with respect to the rotary shafts and the shaft retainers, it is possible to prevent load from being applied to the bearing portions in the axial direction.
    Type: Application
    Filed: December 26, 2006
    Publication date: September 16, 2010
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Shinya Yamamoto, Ryosuke Koshizaka, Kentaro Ishihara, Masahiro Inagaki, Yuya Izawa
  • Patent number: 7607906
    Abstract: A gear pump arrangement comprising a pair of intermeshing gears (16, 18) located between bearing blocks (24) and rotatable to pump fluid from an inlet (12) to an outlet (14), wherein at least one of the bearing blocks (24) comprises a body (28) formed with a recess (32) within which an insert (34) is located, the recess (32) and insert (34) being shaped so as to be of smaller dimensions at a bearing surface (30) of the bearing block (24) than at a point remote therefrom.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: October 27, 2009
    Assignee: Goodrich Control Systems Limited
    Inventors: Martin Kenneth Yates, Glyn Edward Dixon
  • Publication number: 20090148333
    Abstract: A gear pump for operating with reduced likelihood of cavitation occurrences in the fluid being pumped thereby, the pump having a pair of gears each supported on a corresponding one of a pair of gear with teeth provided in each gear that mesh with at least one tooth of the other when such teeth have been rotated into a meshing region in the gear plane, and with one of the gear shafts being rotatably connectable to a motor. Bearing structures rotatably support corresponding ones of each of the pair of gear shafts with the bearing structures having bearing surfaces adjacent those gear sides. A pressurized fluid passageway is provided in at least one of the bearing structures across from the meshing region and extending between surface openings at the bearing surface of that bearing structure that are positioned on opposite sides of an alignment axis in that bearing surface, the surface openings being separated from one another by at least the width of a tooth provided in the pair of gears.
    Type: Application
    Filed: December 11, 2007
    Publication date: June 11, 2009
    Applicant: Hamilton Sundstrand Corporation
    Inventor: James S. Elder
  • Patent number: 7510381
    Abstract: The invention provides a twin-shaft, dry-running rotary piston machine (1) comprising two rotary pistons (8) supported in a housing (2) via shafts (4) and roller bearings (6) with rolling elements, said rotary pistons are horizontally arranged and mesh with each other in opposite directions, so as to define a conveying chamber; two oil chambers (10) arranged in said housing (2) at opposite front sides of the conveying chamber in the area of the roller bearings (6) and provided to be at least in part filled with lubricating oil, two splash elements (12), with per oil chamber (10) one splash element (12) being arranged on the shafts (4) in such a manner that every shaft (4) carries a total of only one splash element (12); and at least two connection channels (14) connecting the two oil chambers (10) with each other.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: March 31, 2009
    Assignee: Aerzener Mashinenfabrik GBBH
    Inventors: Frank Beckmann, Hans-Ulrich Fleige, Ulrich Götzel, Björn Irtel, Oliver Palm
  • Patent number: 7465158
    Abstract: A gear pump for an axle assembly circulates lubricating fluid from a reservoir to a fluid cooler external to the axle assembly. The gear pump includes a first housing section and a second housing section and a center section located between the first and second housing sections. An input gear mounted on an input shaft is engaged with a reduction gear, which are located in a first housing section. Two pumping gears are located in the second housing section. The center section serves as a wall and separates the first housing section from the second housing section. The gear ratio between the input gear and the reduction gear is such that the pumping gears rotate at a speed between at about 47% and at about 75% of the speed of the input shaft.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: December 16, 2008
    Inventor: Bevan Weston
  • Publication number: 20080226485
    Abstract: Provided is a vacuum pump having a rotation body cleaning unit. The vacuum pump includes a case provided with rotation guide holes at opposite end parts. The case includes a rotation body placed inside the case and including a rotation shaft having opposite ends rotatably supported by the rotation guide holes and a number of lobes provided in the rotation shaft at predetermined intervals. Further, a cleaning part is supported by the case and placed in a space between the lobes and cleans the rotation body.
    Type: Application
    Filed: March 17, 2008
    Publication date: September 18, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Tea-Jin PARK, Seung-Ki CHAE, Kwang-Myung LEE, Sang-Gon LEE
  • Patent number: 7144234
    Abstract: The invention concerns a gear pump comprising a pump body (2) closed with a cover (3) forming a cavity wherein is provided a drive pinion (4) capable of being driven in rotation by a drive shaft (1) whereto it is fixed, a driven pinion (5) whereof the teeth co-operate with the drive pinion (4) teeth so as to be driven in rotation thereby and two end shields (8) arranged on either side of the driven pinion (5) penetrating into a cavity (10) provided therefor in the pump body (2) and the cover (3) respectively, means being provided for exerting pressure on the outer surface of the end shields. In order to prevent the cover from being deformed under the effect of the pressure thereby creating a leakage zone between the delivery zone and the suction zone, the end shields each consist of a disc (8) integral with one end of the driven pinion (5), the discs (8) and the driven pinion (5) being concentric, the discs (8) covering the teeth of the driven pinion (5).
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: December 5, 2006
    Assignee: Pierburg, Sarl
    Inventor: Clément Kiefer
  • Patent number: 7018186
    Abstract: The invention relates to a feed pump for delivering fluid media, wherein the pump bearings are lubricated by the feed medium itself. Connecting channels with valve devices are provided on the suction side and on the pressure side upstream and downstream, respectively, of a displacement element and link the bearing area of the pump with the production channel. Said connecting channels are configured as straight bores in the pump housing. The valve devices are configured as tappets that are disposed in the associated connecting channel sections so as to be displaced while being tight with respect to suction.
    Type: Grant
    Filed: August 31, 2002
    Date of Patent: March 28, 2006
    Assignee: Kreyenborg Verwaltungen und Beteilgungen GmbH & Co. KG
    Inventors: Georg Gillert, Dirk Henningsen
  • Patent number: 6945763
    Abstract: A geared feed pump has a housing having a pump chamber in which a rotationally driven pair of gear wheels meshing with one another is disposed for pumping medium out of a suction chamber that communicates with a supply tank, along feed conduits, formed between the circumferential surface of the gear wheels and the circumferential walls of the pump chamber, into a pressure chamber. A drive shaft connected with one of the gear wheels via a coupling member is disposed inside the housing in a coupling chamber. The coupling chamber has a connection with the pressure chamber, so that lubrication of the coupling member is effected by the pumping medium.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: September 20, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Stanislaw Bodzak, Theodor Stipek, Robert Reitsam
  • Patent number: 6802702
    Abstract: The invention relates to a feed pump for fluidic media, comprising a displacement body that is mounted in a pump housing and equipped with slide bearings and connecting channels that connect the slide bearings to the produce channel on the suction side for recirculating the fed medium that lubricates the slide bearings. The connecting channels are linked to control channels that lead to the exterior and guide channels are provided in the extension of the connecting channels in the housing of the cover. Said guide channels accommodate the valve plungers, each of which has a constriction. The section of the valve plunger lying adjacent to the product channel has a length and a diameter, which correspond to the length and diameter of the connecting channel.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: October 12, 2004
    Assignee: Kreyenborg Verwal Tungen und Beteiligungen GmbH & Co. KG
    Inventors: Georg Gillert, Dirk Henningsen
  • Patent number: 6761546
    Abstract: A gear pump comprises a casing and gear rotors disposed therein. The gear rotors are lodged in bearing sections of plain bearings that are lubricated by the pumping medium. They have at least one cooling duct which is embodied such that cooling varies along the circumference and/or in the longitudinal direction and/or in the radial direction of the plain bearing.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: July 13, 2004
    Assignee: Coperion Werner & Pfleiderer GmbH & Co. KG
    Inventors: Edgar R. Schlipf, Peter Heidemeyer, Rainer Herter
  • Patent number: 6729117
    Abstract: A spindle assembly for a rotary mower comprises a spindle that is drivingly connected between an output shaft of a hydraulic motor or other rotary power source and a horizontal blade assembly, and a spindle housing that rotatably supports the spindle for rotation and thrust loads. The spindle is formed from conventional steel rod stock and is machined to produce an upper end of reduced diameter. An impeller and thrust washer fits on the narrower upper end of the spindle and is held in place by a tapered snap ring that fits in a tapered groove in the spindle. In at least one embodiment, radial grooves on the washer facilitate oil flow and assist to impel or pump oil or hydraulic fluid outwardly as the washer rotates. In various embodiments, case drain oil pressure or oil pressure produced by the washer causes oil flow over the spindle assembly bearing surfaces. The spindle assembly can include an oil leak detection passageway.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: May 4, 2004
    Inventor: David S. Frazer
  • Patent number: 6716010
    Abstract: A bearing arrangement for a gear pump comprises first and second separate bearing blocks each having a respective block housing. The first and second bearing blocks together defining an axially directed bearing surface including a bridge region formed from an erosion resistant material which acts to separate inlet and outlet ports of the pump and a second region formed from a reduced friction material. The bridge region is defined by first and second insert members cast within respective ones of the block housings. The first and second bearing blocks are arranged such that respective surfaces of the first and second insert members mate with one another, and the first and second insert members are arranged such that the bridge region of the bearing surface is flush with the second region.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: April 6, 2004
    Inventors: Mark Stephen Eaton, Ian Kimber
  • Patent number: 6688863
    Abstract: A vacuum pump draws gas by operating a gas conveying body in a pump chamber through rotation of a rotary shaft. The vacuum pump has an oil housing member, a stopper and a circumferential wall surface. The oil housing member defines an oil zone adjacent to the pump chamber. The stopper has a circumferential surface. The stopper is located on the rotary shaft to rotate integrally with the rotary shaft and prevents oil from entering the pump chamber. The center of curvature of the circumferential wall surface coincides with that of the rotary shaft. The circumferential wall surface surrounds at least a part of the circumferential surface of the stopper that is above the rotary shaft. The circumferential wall surface is inclined such that the distance between the circumferential wall surface and the axis of the rotary shaft decreases toward the oil zone.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: February 10, 2004
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Nobuaki Hoshino, Masahiro Kawaguchi, Hiroyuki Ishigure, Shinya Yamamoto
  • Patent number: 6685453
    Abstract: A fluid transfer machine includes a positive displacement, rotary-type pumping mechanism driven by a drive shaft. The drive shaft is lubricated and cooled by locating the drive shaft in a primary flow path in the machine. Fluid is directed from the inlet through a passage that intersects a cavity surrounding the drive shaft, at a location between a pair of journal bearings. The fluid then continues directly to the suction side of the pumping mechanism. The drive shaft could also be located on the pressure side of the pumping mechanism. The primary flow cools and lubricates the drive shaft and drive shaft bearings, and reduces the size and complexity of the machine, as additional cooling and lubrication flow passage(s) are not required.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: February 3, 2004
    Assignee: Parker-Hannifin Corporation
    Inventors: Robert E. Oehman, Jr., William Power
  • Patent number: 6413062
    Abstract: The invention relates to a pneumatic motor, in which a rotor (16) driven by compressed air rotates in a cylindrical motor sleeve (14). As a replacement for lubrication with compressed operating air containing oil, as, has hitherto been the conventional practice, cavities (28) for accommodating a lubricant ( ) and connecting paths for the transport of the lubricant (30) from the cavities (28) into the motor sleeve (14) are provided in the rotor (16).
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: July 2, 2002
    Assignee: J. D. Neuhaus GmbH & Co. KG
    Inventor: Dieter Peters
  • Patent number: 6213745
    Abstract: A journal bearing comprises a body having a central longitudinal axis, a cylindrical inner surface coaxially disposed around the longitudinal axis and defining an axial bore, and an outer surface including a peripheral planar section. A lateral face is disposed on an end of the body, and extends between the outer and inner surfaces of the body. A feed channel is formed in the lateral face at an acute angle with respect to the planar section and in an inward direction with respect to the axial bore. A first end of the feed channel communicates with the outer surface of the bearing at a location proximate to the planar section, and a second end of the feed channel communicates with the axial bore. A pocket is formed in the inner surface of the bearing in communication with the second end of the feed channel and extends along a substantially helical path from the lateral face of the bearing. At least a portion of the pocket has a width of greater magnitude than a corresponding depth of the portion.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: April 10, 2001
    Assignee: Dynisco
    Inventors: Glenn Woodcock, Billy R. Whisnant, Kevin S. Tuttle