Bearing, Seal, Or Liner Between Shaft Or Shaft Sleeve And Static Part Patents (Class 415/229)
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Patent number: 5503523Abstract: A transmission-driven compressor for compressing oxygen. It has one or more stages (1-4) mounted on a rotor shaft (8) and accommodated in a housing (15). The shafts are driven by an integrated oil-lubricated transmission and rest in bearings (10) in another housing (5) that accommodates the transmission. The shafts also rest in additional bearings (18) in a stabilizing plate that the compressor housing is secured to and that is separated from the transmission housing (5) by atmosphere.Type: GrantFiled: September 9, 1994Date of Patent: April 2, 1996Assignee: Deutsche Babcock-Borsig AktiengesellschaftInventor: Heinrich Prumper
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Patent number: 5499901Abstract: A pump shaft clearance seal construction disposed adjacent a bearing frame (49, 51) for preventing lubricating fluid from migrating away from the bearing frame. The clearance seal construction includes a plurality of grooves (labyrinth or single spiral groove) defined in the exterior periphery of a rotating member disposed immediately adjacent the bearing frame, the rotating member and a corresponding stationary member defining a fluid sealing clearance passageway (63) in which the grooves are disposed. When the pump shaft (7) is rotated, the air flow created in the passageway (63) by the rotating grooves (73) deters the lubricating fluid from migrating away from the bearing frame (49,51).Type: GrantFiled: March 17, 1994Date of Patent: March 19, 1996Assignee: Environamics CorporationInventor: Robert E. Rockwood
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Patent number: 5496150Abstract: A vertical turbine pump which operates with its inlet submerged in a body of liquid to be pumped employs an impeller provided with two or three equiangularly spaced vanes and a diffuser section provided with three equiangularly spaced stationary vanes. A vertical turbine pump incorporating such a combination of impeller and diffuser vanes exhibits favorable hydraulic efficiency and smooth operation and can effectively handle liquids with entrained solids. The pump bowl bearings are part of a cartridge which is readily removed and installed through the upstream end of the pump to facilitate servicing in the field.Type: GrantFiled: October 14, 1994Date of Patent: March 5, 1996Assignee: Patterson Pump Co.Inventors: Ernest J. Claxton, III, Eugene F. Poser
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Patent number: 5494401Abstract: An orifice motor which includes a plurality of spaced-apart rotors positioned along a shaft and enclosed within a casing or housing. Each rotor includes at least one jet orifice thorugh which fluid passes and is ejected tangentially to the peripheral surface of the rotor. The apparatus also includes a high pressure fluid inlet at a first end of the shaft, and a plurality of exit ports together with an exit chamber at a second end of the shaft. Bearings and seals are employed to protect frictionally related surfaces. Fluid is injected into one end of the apparatus and travels axially through the apparatus, passing through each of the rotors by way of the orifices. As the fluid exits the orifices, a pinwheel effect is created which causes the rotors to spin, thus causing the attached shaft to spin. As fluid exits each rotor, it is introduced to the next rotor downstream, where it exits in the same way.Type: GrantFiled: December 15, 1994Date of Patent: February 27, 1996Inventor: Rajan Varadan
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Patent number: 5482432Abstract: A coolant pump system features a pump impeller supported on a pump shaft without bearings, and an axially in-line drive shaft with bearings coupled to the pump drive shaft. The system minimally includes a pump body having a bore therein, a coolant pump impeller, a pump shaft passing through the bore and having the impeller mounted on one end thereof, and a bearingless seal shaft assembly disposed in the bore which prevents coolant from leaking out of the body around the rotating pump shaft. The outer end of the pump shaft and the drive shaft are designed to be quickly disconnected to allow simpler, easier, less expensive interconnection of or replacement of the coolant pump, should that ever be necessary.Type: GrantFiled: January 18, 1994Date of Patent: January 9, 1996Assignee: Deco-Grand, Inc.Inventors: Joseph Paliwoda, Verle Propst
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Patent number: 5458460Abstract: Disclosed is a bearing unit which can be used in a drainage pump operated without supply of clean water or a hydraulic pump, which exhibits excellent wear resistance against water containing earth and sand and satisfactory assembling facility, and a method of manufacturing the bearing unit.The contact surface of a bearing made of stainless steel and/or that of a sleeve is applied with a sprayed coating, the main component of which is WC, and which contains one or more elements selected from a group consisting of nickel, chromium and cobalt as a binder material thereof, or a sprayed coating, the main component of which is Cr.sub.3 C.sub.2, and which contains NiCr as a binder material, after the sprayed coating has been formed, heating at from 300.degree. C. to 550.degree. C. is performed for one hour or longer so that hardness and wear resistance equivalent to those of a WC-12% sintered article is attained.Type: GrantFiled: February 16, 1994Date of Patent: October 17, 1995Assignee: Hitachi, Ltd.Inventors: Ryoji Okada, Kooji Aizawa, Masayuki Yamada, Kenji Otani, Kunio Takada, Mitsuaki Haneda, Toshihiro Yamada
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Patent number: 5441386Abstract: A lubricating system for cooling fans is provided and mainly consists of a self-lubricating bearing, an oil retaining cap, and an oil retaining ring. The oil retaining ring has a central hole, an inner portion adjacent to the central hole and having a round cross section, and an outer flange portion integrally extended from the inner portion and having a concavo-concave cross section. The oil retaining cap is bowl-shaped and has a central opening, an inner convex portion, and an outer concave portion. The self-lubricating bearing has two end surfaces each of them being provided with a plurality of shallow bevel grooves inclining toward an axially extended shaft hole of the bearing, and an annular recess formed at a middle section of the shaft hole.Type: GrantFiled: July 29, 1994Date of Patent: August 15, 1995Inventor: Hsin M. Hsieh
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Patent number: 5433584Abstract: A bearing support housing for turbomachines like gas turbine engines. The housing is a one piece component having a flexible forward portion and rigid rearward portions, resulting in a housing having a unique combination of properties that allow for normal running of the engine as well as safe operation during unplanned rotor imbalances.Type: GrantFiled: May 5, 1994Date of Patent: July 18, 1995Assignee: Pratt & Whitney Canada, Inc.Inventors: Mohamed-Samy A. Amin, Anthony J. Matthews
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Patent number: 5403154Abstract: A fan assembly ideally suited for use in small high speed low load cooling fans used in computers, peripherals and other office equipment. The assembly includes a shaft and bearing combination instead of conventional rolling element bearing, washer and lock ring assemblies. The bearing is formed of plastic and constructed so that it can be precisely positioned with respect to the shaft in the housing.Type: GrantFiled: December 15, 1993Date of Patent: April 4, 1995Inventor: Russell D. Ide
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Patent number: 5395124Abstract: A segmented seal ring and spring system for steam turbines for minimizing leakage between rotating and stationary components, and preventing damage and wear thereto, including a segmented seal ring, with first springs biased against the seal segments to urge the segments radially outward toward a large clearance position of the seal ring with respect to the turbine shaft. The springs urge the seal segments into the large clearance position at low shaft speeds and small turbine loads, whereas at medium to high flows and high working pressure, working fluid will overcome the spring forces and urge the seal segments into a small clearance position. Special gravity springs are provided in the lower half seal ring segments with the lower end of such springs seated against the turbine casing while the upper spring end is biased against the seal segment to produce an upward force which neutralizes the downward force caused by the weight of the segment.Type: GrantFiled: January 4, 1993Date of Patent: March 7, 1995Assignee: IMO Industries, Inc.Inventor: Ronald E. Brandon
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Patent number: 5385454Abstract: A bearing device for use in a canned motor includes a bearing housing detachably mounted on a motor frame of the canned motor, and a radial bearing supported by the bearing housing. A pair of axially spaced stationary thrust sliding surfaces is mounted on the bearing housing, and a pair of axially spaced rotating thrust sliding surfaces are mounted on the rotor in confronting relationship to the stationary thrust sliding surfaces, respectively. A resilient member such as an O-ring is interposed between the motor frame and the bearing housing for holding the bearing housing in radial position with respect to the motor frame.Type: GrantFiled: April 14, 1993Date of Patent: January 31, 1995Assignee: Ebara CorporationInventors: Makoto Kobayashi, Masakazu Yamamoto, Yoshio Miyake, Yoshikazu Kimura
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Patent number: 5385445Abstract: A multi-stage open impeller centrifugal pump, primarily used for charging service. The pump uses multivane, 27 vanes, impellers, mounted on a single shaft. Rotor parts are a loose fit to the pump shaft and channel rings are pulled together with bolts. Jackbolts are used to separate the channel rings. A channel ring bushing is provided with a loose fit. The channel ring bushing is axially and radially retained by the channel ring and diffusor.Type: GrantFiled: December 3, 1993Date of Patent: January 31, 1995Assignee: Ingersoll-Dresser Pump CompanyInventor: John M. McKenna
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Patent number: 5364543Abstract: A turbine engine having an interior housing and one or more annular abradable seals for the turbine blades. The abradable seal comprises a resin having fractured hollow inorganic non-metallic microspheres forming nooks, crannies and undercuts in the resin and a solid lubricant in the resin and in the nooks and crannies and undercuts formed by the fractured hollow non-metallic inorganic microspheres.Type: GrantFiled: January 19, 1993Date of Patent: November 15, 1994Inventors: Alexander A. Bosna, Louis M. Riccio
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Patent number: 5310311Abstract: An air cycle machine for producing a supply of cooled air and including a compressor rotor fixed to a shaft which is driven by a turbine rotor, the turbine serving to expand air which is pressurized by the compressor. Magnetic bearings support the shaft radially in a housing for rotation about a precisely established axis while a magnetic thrust bearing keeps the shaft in a precisely fixed axial position. The housing and the bearings are constructed as two split sections to permit the housing and the bearings to be separated radially and facilitate repair and/or replacement of the shaft and other internal components.Type: GrantFiled: October 14, 1992Date of Patent: May 10, 1994Assignee: Barber-Colman CompanyInventors: Michael Andres, Terry L. Coons
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Patent number: 5306117Abstract: A rotary fluid machine suitable for transferring energy between a fluid and a rotor assembly is disclosed. The rotor assembly contains a shaft carrying one or more impellers which are located between axially spaced radial bearings in a beam-type arrangement. The rotary fluid machine is of the beam type--i.e. it has one end of the shaft extending beyond one end wall of the housing and one end of the shaft terminating within the housing. Two passages are formed in the housing to allow fluid to flow in and out of the machine. One passage is formed in the housing parallel to and coaxial with the rotational axis of the rotor assembly. Fluid moving between the passage parallel to and coaxial with the rotational axis does not have to be redirected thus reducing fluid turbulence and improving machine efficiency.Type: GrantFiled: December 7, 1992Date of Patent: April 26, 1994Assignee: NOVA Corporation of AmericaInventors: Clayton Bear, Robert A. Peterson
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Patent number: 5302091Abstract: In a magnetically driven centrifugal pump so designed that a drive power of an electric motor is transmitted from a magnets-embedded drive rotor to a magnets-embedded follower rotor which is opposed to the drive rotor for the formation of a magnetic coupling and is associated with an impeller by a rotating shaft, the rotating shaft is supported with a radial bearing of ceramic material of non-rotation which is fitted into a supporting member fixed in a pump casing, wherein a cushioning member is mounted compressedly in an interspace between a front end of the thrust bearing and a circular edged projection of the supporting member which are opposed to one another.Type: GrantFiled: January 28, 1993Date of Patent: April 12, 1994Assignee: Sanwa Hydrotech Corp.Inventor: Korejiro Horiuchi
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Patent number: 5271723Abstract: Oil pump manufacture is simplified by providing the pump body with a planar unstepped face and achieving radial location by the provision of a bush 22 (FIG. 2) on the pump driven shaft 14, which bush is received in the counterbore 24 of the part journalling the drive shaft 16, i.e. the cylinder block adjacent the end of the drive shaft (crankshaft).Type: GrantFiled: April 2, 1992Date of Patent: December 21, 1993Assignee: Concentric Pumps LimitedInventor: Steve Hodge
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Patent number: 5237817Abstract: The cost and bulk of a speed reducing transmission required to provide low speed rotational power from a gas turbine engine is avoided by employing bearings (16, 18) jornalling a high speed shaft (12) of the engine with a power takeoff in the form of a tubular shaft (62) having bearing receiving and retaining openings (82) to act as a bearing cage for bearing elements (64, 66) disposed between inner and outer bearing races (68, 70). Upon rotation of the high speed shaft (12), the bearing elements (64, 66) will move in an epicyclic fashion thereby driving the tubular shaft (62) at a reduced rotational rate allowing it to drive loads such as a dynamoelectric machine (90) or a ducted fan (48) at rotational speeds less than the rotational speed of the high speed shaft (12).Type: GrantFiled: February 19, 1992Date of Patent: August 24, 1993Assignee: Sundstrand CorporationInventors: Tibor Bornemisza, George Hosang
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Patent number: 5174250Abstract: Pressurizing an intermediate fluid chamber of a pump housing is useful to substantially eliminate fluid loss across the seal faces in the pump housing. The subject dual seal pump has a spring-loaded diaphragm in an intermediate fluid chamber of the pump housing separating the intermediate fluid chamber into primary and secondary compartments. A fluid chamber in the pump housing is in fluid communication with the primary compartment of the intermediate fluid chamber. A fluid connecting means, including a conduit, an annulus, a pair of passages, and a recess communicate fluid into the primary compartment of the intermediate fluid chamber. The secondary compartment of the intermediate fluid chamber contains a non-corrosive fluid which is pressurized accordingly by the spring-loaded diaphragm. The result is a higher pressure in the second compartment of the intermediate fluid chamber which substantially eliminates fluid loss across the seal.Type: GrantFiled: December 27, 1991Date of Patent: December 29, 1992Assignee: Caterpillar Inc.Inventor: William H. Lane
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Patent number: 5161940Abstract: An annular support (22) accommodates differential thermal growth between first and second support rings (24, 26). The support (22) prevents relative axial, circumferential lateral and bending movement between the rings (24, 26), while allowing uniform differential radial expansion and contraction.Type: GrantFiled: June 21, 1991Date of Patent: November 10, 1992Assignee: Pratt & Whitney Canada, Inc.Inventor: Allan B. Newland
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Patent number: 5160246Abstract: In a magnetically driven pump so designed that a drive power of an electric motor is transmitted from a magnets-embedded drive rotor to a magnets-embedded follower rotor opposed to one another by way of a magnetic coupling, the follower rotor and an impeller are secured respectively to the opposite ends of a rotating shaft to which a thrust bearing of ceramic material is fastened for receiving an axial load, wherein a cushioning member is mounted on the rotating shaft so as to push the thrust bearing from the rear, in the position between the thrust bearing and a flange provided on the rotating shaft for determining the position of the follower rotor.Type: GrantFiled: January 8, 1991Date of Patent: November 3, 1992Assignee: Sanwa Koki Co., Ltd.Inventor: Korejiro Horiuchi
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Patent number: 5088887Abstract: A turbine has a housing, an impeller centered on and rotatable about an axis in the housing, and a small-diameter bearing stem centered on the axis, fixed on the housing, and extending from an attachment location on the housing toward the impeller. A pinion traversed by the bearing stem is fixed to the impeller and forms with the impeller a rotor having a center of mass spaced axially a predetermined distance from the attachment location. A gear rotatable on the housing adjacent the axis and meshing with the pinion is supported on the stem by an inner bearing engaged between the pinion and the stem. An outer bearing supports the rotor on the stem of the axle assembly at a bearing location spaced from the attachment location by a distance equal to between 0.4 and 1.2 times the predetermined distance between the center of mass and the attachment location.Type: GrantFiled: February 21, 1990Date of Patent: February 18, 1992Assignee: Atlas Copco Energas GmbHInventors: Werner Bosen, Hans-Dieter Denz
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Patent number: 5076755Abstract: This invention discloses a bearing device for a high speed rotary shaft comprising a functional bearing disposed on a shaft which is supported rotatably on a housing by a pair of bearings, and capable of supporting rotatably the shaft, a rotation sensor for detecting the revolution of the shaft and a controller for changing the functional bearing to a shaft supporting state in response to a rotation detection signal from the rotation sensor representing that the number of revolution of the shaft is above a predetermined number of revolution. When the shaft rotates at a low speed, the functional bearing is set to a free state and the shaft is supported at two points on the housing by the pair of bearings alone. When the shaft rotates at a high speed, the functional bearing is operated so that the shaft is supported at three points on the housing to prevent the occurrence of deflection of the shaft.Type: GrantFiled: March 16, 1990Date of Patent: December 31, 1991Assignee: Isuzu Motors LimitedInventor: Masaki Okada
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Patent number: 5071317Abstract: A multiple-stage pump has a one-piece diffusion casing and a one-piece multiple turbine impeller. The casing has multiple diffusion chambers enclosing respective multiple impeller sections. The casing and the impeller have adjacently disposed surfaces at predetermined locations to form a discrete area between the surfaces to provide a dynamic bearing means.Type: GrantFiled: June 4, 1990Date of Patent: December 10, 1991Inventor: Alan Leach
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Patent number: 5026253Abstract: A belt-driven water pump for use with an internal combustion engine includes a pump shaft, a housing lid having an opening through which one end of the pump shaft extends, a bearing, a pump shaft seal, a pump rotor, and a pulley integrally formed with the pump shaft. The pump shaft and the pulley are made in one piece, preferably, of plastic.Type: GrantFiled: May 22, 1989Date of Patent: June 25, 1991Assignee: Firma Carl FreudenbergInventor: Herbert Borger
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Patent number: 4992024Abstract: A fluid bearing damper for damping radial motion of a bearing includes a plurality of concentric, circular, thin shims located in an annular damping chamber to present thin, radially stacked damping cavities. A portion of the shims have protruding radial lands that partially define the cavities, carry radial loads through the damper and produce a controlled mechanical centering force as well as serving to ensure replenishment of fluid film cavities.Type: GrantFiled: December 13, 1989Date of Patent: February 12, 1991Assignee: Allied-Signal Inc.Inventor: Hans Heydrich
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Patent number: 4966552Abstract: A handpiece particularly suited for medical/dental applications in which a rotary tool is used upon and in proximity with anatomical structures. The handpiece has an anti-friction bearing assembly which mounts the rotary tool. At least the rolling elements of the bearing assembly are formed of ceramic material. The instrument may be sterilized repeatedly without requiring lubrication either in use or between sterilization cycles.Type: GrantFiled: May 8, 1989Date of Patent: October 30, 1990Assignee: Den-Tal-Ez, Inc.Inventor: Donald I. Gonser
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Patent number: 4955786Abstract: A drive device for pumps consists of a drive pulley to drive a shaft. The shaft assembly includes an inner bearing seated in the housing bore, an outer bearing seated on a neck of a pump cover, a cover disk with an outer edge, covering the outer bearing and the neck of the pump cover laterally from the outside and is connected to the drive pulley, and a center of the shaft, a spring for the automatic play eliminating adjustment of the radial and axial load-supporting outer and inner bearing.Type: GrantFiled: August 16, 1989Date of Patent: September 11, 1990Assignee: SKF Kugellagerfabriken GmbHInventors: Heinrich Kunkel, Heinz Kiener, Armin Olschewski
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Patent number: 4927326Abstract: Damping seals, damping bearings and a support sleeve for the ball bearings of a high speed rotor, the ball bearings being a duplex set having the outer races packaged tightly within the sleeve while the sleeve provides a gap with a support member so that the bearings may float with the sleeve. The sleeve has a web extending radially between the pair of outer races and acts in conjunction with one or more springs to apply an axial preload to the outer races. The sleeves have a series of slits which provide the sleeve with a spring-like quality so that the spring acts to center the rotor upon which the bearings are mounted during start up and shut down. A damping seal or a damping bearing may be used in conjunction with the ball bearings and supporting sleeve, the damping seal and damping bearing having rotor portions including rigid outer surfaces mounted within the bore of a stator portion triangular shaped pockets on the surface facing the rotor.Type: GrantFiled: May 26, 1989Date of Patent: May 22, 1990Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventor: George L. von Pragenau
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Patent number: 4875827Abstract: A fluid pump has a casing and a support tube mounted within the casing. A rotatably mounted drive shaft is inserted through the support tube and has a propeller mounted on one end thereof for moving fluid through the pump. A helical shaped bearing is seated between the drive shaft and the support tube for supporting the shaft and permitting fluid flow therethrough.Type: GrantFiled: December 24, 1987Date of Patent: October 24, 1989Assignee: Flux Gerate GmbHInventors: Alois Gschwender, Horst Kruger, Bernhard Schleifer