Fluid Biased, Movable Or Resilient Portion Patents (Class 415/113)
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Patent number: 4203703Abstract: A hydraulic turbo-machine incorporating wicket gates for purposes of controlling and closing down the flow of working fluid through the machine is provided with an annular ring gate selectively operable to take up any operating clearance between the casing and the adjacent axial edge of the wicket gates. This arrangement makes it practical to incorporate relatively large initial clearances between the wicket gates and the fixed machine structure, so as to leave provision for natural contraction of such clearances during the life of the machine, due to shrinkage of the concrete or other expected or unexpected causes. The operation of the annular ring as a piston within a cylinder is facilitated utilizing penstock water or oil under pressure as the motivating fluid.Type: GrantFiled: October 26, 1977Date of Patent: May 20, 1980Assignee: Dominion Engineering Works LimitedInventor: Paul Koeller
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Patent number: 4202654Abstract: A trash handling pump featuring simplicity of construction wherein the pump parts stack one upon the other and the impeller and/or its housing, the latter of which has integrated volute structure, include resilient surface portions strategically formed and located to prevent solids from fixedly lodging therebetween and thereby causing the parts to either malfunction or break. As here provided, the impeller housing has a slip fit and shock absorbing mount. The pump unit also features a self lubricating system which is automatically controlled by the pump discharge. An improved arrangement of seals insures against leaking of lubricant from the pump housing.Preferred embodiments of the pump include a two part impeller housing embodying volute structure in each part thereof. The arrangement is such that the parts may be easily molded of plastic materials.Type: GrantFiled: December 29, 1976Date of Patent: May 13, 1980Inventor: Alfred S. Marlow
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Patent number: 4165203Abstract: A pressurized medium powered device has a motor of the external rotor type, both the stator and the rotor of the motor having registering channels which communicate with one another across an interstice. At least one annular groove is provided in at least one of the rotor and stator components of the motor at the interstice, and at least one annular sealing element, such as an O-ring or a slotted ring of rectangular cross-sectional configuration is received in the annular groove with axial and radial play and is pressed into sealing contact with the components, and into sliding contact with at least one of the components, by the pressure of the pessurized medium. An annular depression may be formed in the other component in registry with the annular groove, and the sealing element may be partly received in such depression.Type: GrantFiled: September 30, 1976Date of Patent: August 21, 1979Assignee: Robert Bosch GmbHInventors: Kurt Latzina, Hans Martin, Richard Wolf
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Patent number: 4108569Abstract: In a rotodynamic pump intended for operation at high pressures e.g. 2000 p.s.i. and for pumping contaminated fluids e.g. corrosive water, high pressure sealing assemblies are provided at the through-openings in the pump casing for the pump shaft. Each assembly includes a pair of axially spaced mechanical seals, and each seal comprises a rotor portion fixed to the pump shaft and a stator portion axially movable into sealing engagement with the rotor portion, the stators being located intermediate the rotor portions. A busing is located between the seals and includes conduits supplying oil at a pressure above pump pressure to the innermost seal whence the oil is reduced in pressure and passed to the outermost seal, so that oil is delivered to the facing ends of the stators. The oil serves for lubrication of the sealing interfaces and for the prevention of egress of contaminated material through said innermost seal.Type: GrantFiled: May 26, 1976Date of Patent: August 22, 1978Assignee: Weir Pumps LimitedInventors: Michael Leslie Ryall, James Rennie Robertson
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Patent number: 4103905Abstract: A variable radius labyrinth seal arrangement for use in a steam turbine apparatus is characterized by a flexible strip member having mounted substantially perpendicular thereto a series of corrugated uprights. The strip is received within a circumferential groove provided in the turbine casing and is flexible to conform to the curvature of the groove, thus permitting seal use in a variety of turbine sizes. The amplitude of the corrugations, or waviness, of the uprights varies in accordance to the magnitude of the flexure of the strip necessary for the strip to conform to the groove curvature. The strip is movably biased within the groove and responds to forces generated by contacts between the uprights and rotating turbine elements by displacing radially outward from that contact.Type: GrantFiled: February 7, 1977Date of Patent: August 1, 1978Assignee: Westinghouse Electric Corp.Inventors: John W. Desmond, Joseph F. Kmec, Charles A. Meyer
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Patent number: 4101241Abstract: A supercharger comprising a center housing, a turbine casing mounted on said center housing, a turbine shaft rotatably supported within said center housing, said turbine shaft having a turbine impeller at one end thereof within said turbine casing, a seal provided on said turbine shaft to prevent lubricant leakage from said center housing to said turbine casing, a heat shroud mounted on said turbine shaft between said center housing and said turbine casing, and a pressure hole formed in said heat shroud which permits communication of the inner and outer parts thereof thereby applying a high pressure in the inside part of said heat shroud to enhance sealing effect of said seal.Type: GrantFiled: May 19, 1976Date of Patent: July 18, 1978Assignee: Kabushiki Kaisha Komatsu SeisakushoInventor: Tamotsu Kasuya
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Patent number: 4083647Abstract: A pump for handling liquids laden with abrasive particles in which the seal of the shaft between the low- and high-pressure stages comprises at least two floating rings provided on the shaft in a circular gap between the shaft and the casing. The casing has a circular collar at the side of the low-pressure stage, partly covering the circular gap which is adjoined by the rings during pump operation.Type: GrantFiled: May 24, 1976Date of Patent: April 11, 1978Inventors: Viktor Arsentievich Tatkov, Nikolai Nikolaevich Letov, Boris Nikolaevich Sharapov, Vladimir Petrovich Rozhkov
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Patent number: 4080094Abstract: Method and apparatus to lift the rotor of an earth borehole downhole drilling motor with a resilient force that exceeds the rotor weight so that starting of the motor is more certain due to reduced drag on primary thrust bearings. Additionally the apparatus may be used to reduce imbalanced axial loads on rotor primary thrust bearings.Type: GrantFiled: August 16, 1976Date of Patent: March 21, 1978Assignee: Eastman-Whipstock, Inc.Inventor: John Doise Jeter
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Patent number: 4047858Abstract: An axially fixed, radially limitedly movable stuffing box assembly including mounting means therefor. The stuffing box is adapted to have means for continuously flushing its bushing during operational rotational movements of a shaft functionally engaged therewith. The stuffing box when used in functional combination with a screw of a screw pump which is itself adapted for the pumping of high density fluids greatly reduces the tendency for radial forces generated during pumping to cause shaft deflection and to produce shaft wear and leakage.Type: GrantFiled: March 10, 1976Date of Patent: September 13, 1977Assignee: Houdaille Industries, Inc.Inventor: Albert A. Zalis
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Patent number: 4044561Abstract: A steam turbine construction wherein the turbine rotor shafting is mounted in bearing means located in the end walls of the turbine housing and wherein the bearings are lubricated with water condensed from the working steam supplied to the turbine. The lubricant flows in a re-circulating system tapped from the condensate-return line leading back to the boiler from the condenser after the turbine has been started and is supplying power, and an auxiliary supply of lubricant water is taken from a reserve gravity flow tank to supply water to the bearings during the starting and stopping runs of the turbine.Type: GrantFiled: August 11, 1975Date of Patent: August 30, 1977Assignee: BBC Brown Boveri & Company LimitedInventor: Alfred Hohn
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Patent number: 3999883Abstract: A turbine nozzle has a row of vanes each rotatable about an axis extending spanwise of the vane. Each vane is rotated by a shaft which extends through one shroud of the stator vane stage. The free end of each vane is sealed by a flexible seal ring structure made up of overlapping flexible leaves. These leaves are fixed to the nozzle inner shroud at the downstream side of the vanes and motive fluid under pressure is admitted upstream of the vanes to the space between the leaves and the shroud so that the pressure difference across the leaves biases them into engagement with the ends of the vanes. The purpose is to seal against leakage past the vane ends without causing undue frictional resistance to varying the vane setting angle.Type: GrantFiled: July 2, 1975Date of Patent: December 28, 1976Assignee: General Motors CorporationInventor: Gary E. Nordenson
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Patent number: 3976392Abstract: A circulation pump having a comparatively slender drive shaft is provided with an improved axial sealing arrangement to prevent the leakage of circulating liquid through the bore in the pump housing wall in which the drive shaft is supported. The sealing arrangement comprises a pair of bushing-like bodies disposed around the drive shaft between the drive shaft and the wall of the bore, and a pair of pressure elements disposed around the drive shaft and movable in the direction of the shaft abut the sealing elements and are pressed into engagement with the sealing elements by spring means located outside the bore.Type: GrantFiled: October 18, 1974Date of Patent: August 24, 1976Inventor: Mauritz Bolin
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Patent number: 3954348Abstract: This invention relates to a device for rendering pumps tight of the type in which the pressure of the auxiliary liquid is a function of the pressure prevailing in the pump body, wherein the stuffing box communicates with a reservoir constituted by a casing open on one face but normally closed by an elastically deformable membrane covered by a casing communicating with the pump body.Type: GrantFiled: November 30, 1973Date of Patent: May 4, 1976Assignee: Pompes Multiflux, Societe AnonymeInventor: Georges Renaud
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Patent number: 3947147Abstract: A stator of a hydraulic machine with the end-face sealing of vanes comprises an upper rim, a lower rim and rotatable stator vanes mounted with their journals in said rims in such a manner as to form an annular row. The upper and lower rims are provided with holes for receiving the vane journals and with rectangular recesses located between the adjacent holes receiving the vane journals in the zone of projection of the section of the vanes on said rims when the vanes are in the closed position. In order to eliminate leakages of liquid between the rims and the end faces of the vanes, a seal is disposed in each recess along the entire length thereof. The seal comprises a gasket inserted in the recess with a space remaining between the base thereof and the bottom of the recess, the gasket having at least one through passage for filling the space with liquid flowing to the stator.Type: GrantFiled: September 27, 1974Date of Patent: March 30, 1976Inventors: Valentina Vasilievna Loktaeva, Vitaly Viktorovich Vikhirev, Gleb Stepanovich Schegolev