Patents Examined by Vishal A Patel
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Patent number: 11353088Abstract: A chain unit lubricated and sealed with magnetic fluid includes a pin shaft, a magnetic sleeve, a first pole piece and a second pole piece. The sleeve is fitted over an outer periphery of the pin shaft. Both ends of the pin shaft protrude from the sleeve. A first gap exists between an inner peripheral surface of the sleeve and an outer peripheral surface of the pin shaft. The first pole piece is arranged at one of the sleeve and has a first mating hole. A second gap exists between an inner wall surface of the first mating hole and the outer peripheral surface of the pin shaft. The second pole piece is arranged at the other end of the sleeve and has a second mating hole. A third gap exists between an inner wall surface of the second mating hole and the outer peripheral surface of the pin shaft.Type: GrantFiled: October 21, 2021Date of Patent: June 7, 2022Assignee: TSINGHUA UNIVERSITYInventors: Decai Li, Yanwen Li, Siyu Chen
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Patent number: 11333253Abstract: A magnetic seal assembly comprises a metallic annular wear seal. A magnetic seal has a magnetic annular body adjacent to and attracting the wear seal into contact against a contact face thereof. A retainer ring is connected to a surface to the magnetic seal, the retainer ring having a coefficient of thermal expansion different than a coefficient of thermal expansion of the annular body, the coefficient of thermal expansion of the retainer ring selected to constrain a thermal expansion of the annular body. A method for controlling a thermal expansion of a magnetic seal assembly is also provided.Type: GrantFiled: December 19, 2018Date of Patent: May 17, 2022Assignee: PRATT & WHITNEY CANADA CORP.Inventor: Marc-Andre Pelletier
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Patent number: 11333275Abstract: Pipe sections are often connected together with a spigot end received within a bell end and a gasket provided there between. An assist may be helpful to apply at least a tension if not move the gasket towards a gap between the bell end and an exterior surface of the spigot end of the two pipe portions, and/or against the exterior surface of the spigot end so as to improve the likelihood of an adequate seal.Type: GrantFiled: March 23, 2020Date of Patent: May 17, 2022Inventor: Troy Daniel Roach
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Patent number: 11333251Abstract: A controllable mechanical seal for sealing a shaft rotatable relative to a housing of a device which manipulates a fluid, the seal including: (i) a first face element having a first face surface, wherein the first face element is adapted to rotate with the shaft; (ii) a second face element having a second face surface, wherein the second face element is adapted to be supported within the housing; wherein the first face surface and the second face surface define a gap between the surfaces, physical dimensions of the gap contributing to defining a leakage rate of the fluid through the gap; wherein at least one of the first face element or the second face element includes at least one cavity wholly contained within the face element, the at least one cavity adapted to contain a hydraulic fluid; and wherein the at least one cavity is in fluid communication with at least one hydraulic intensifier and at least one pressure control valve, the at least one hydraulic intensifier being in pressure communication with a sType: GrantFiled: January 11, 2019Date of Patent: May 17, 2022Assignee: GEORGIA TECH RESEARCH CORPORATIONInventors: Richard F. Salant, John Wilson Payne
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Patent number: 11333197Abstract: A circumferential seal assembly suitable for forming a thin film between a rotatable runner and a sealing ring is presented. The assembly includes an annular seal housing, a rotatable runner, an annular seal ring, and a plurality of groove structures. Each groove structure includes a groove and an optional feed groove. The groove includes at least two adjoining steps defined by base walls arranged to decrease depthwise. Two adjoining base walls are disposed about a base shoulder. Each base shoulder locally redirects a longitudinal flow to form an outward radial flow in the direction of the annular seal ring. The base walls are bounded by and intersect a pair of side walls. A side wall includes at least one side shoulder which narrows the groove widthwise and locally redirects the longitudinal flow to form a lateral flow in the direction of the other side wall. Outward and lateral flows separately or in combination enhance stiffness of a thin-film layer between the annular seal ring and the rotatable runner.Type: GrantFiled: January 21, 2020Date of Patent: May 17, 2022Assignee: Stein Seal CompanyInventor: Glenn M. Garrison
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Patent number: 11306821Abstract: A refrigerator gasket assembly has a first gasket section, a second gasket section and a coupler connecting the first gasket section and the second gasket section. The coupler is configured to permit the selective connection and disconnection of the first gasket section from the second gasket section. In some variations, the coupler is a two piece coupler and in other variations the coupler is a three piece coupler.Type: GrantFiled: July 15, 2019Date of Patent: April 19, 2022Inventor: Wesley G. Moulton
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Patent number: 11300211Abstract: A capillary magnetic-liquid sealing device includes: a housing having a shaft chamber; a rotating shaft arranged in the shaft chamber; a first pole shoe and a second pole shoe fitted over the rotating shaft and spaced apart in an axial direction of the rotating shaft; a permanent magnet fitted over the rotating shaft and located between the first pole shoe and the second pole shoe; a first magnetically nonconductive capillary block and a second magnetically nonconductive capillary block fitted over the rotating shaft and spaced apart in the axial direction of the rotating shaft. A first capillary cavity is formed among the first magnetically nonconductive capillary block, the first pole shoe and the rotating shaft; and a second capillary cavity is formed among the second magnetically nonconductive capillary block, the second pole shoe and the rotating shaft.Type: GrantFiled: September 7, 2021Date of Patent: April 12, 2022Assignee: TSINGHUA UNIVERSITYInventors: Decai Li, Rui Sun, Qian Li
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Patent number: 11293649Abstract: A protective seal removably fits onto the top of coil fins of a condenser unit for an air conditioning system. The protective seal has a U-shaped cross-sectional configuration that allows the protective seal to fit over and completely cover the entire top edges of the coil fins and to extend partially down the front and rear sides of the coil fins to cover an upper portion of the front and rear sides of the coil fins. The protective seal is further structured to follow the contour of the top edges of the coil fins around all sides of the condenser unit to protect the top edges and the upper portion of the front and rear sides of the coil fins when the top lid of the condenser housing is both hinged open and closed.Type: GrantFiled: February 4, 2019Date of Patent: April 5, 2022Inventor: Omar Crespo-Calero
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Patent number: 11287045Abstract: A seal ring system is provided. The seal ring system comprises a segment defining a slot, a pedal along the slot, and an opening offset from the slot. A retention fastener may be disposed in the opening. A seal ring system is also provided comprising a first segment defining a first opening, a second segment defining a second opening, and a retention fastener extending through the first and second openings. The retention fastener configured to allow relative radial movement of the first segment and the second segment. A seal is further provided comprising a seal ring having a central axis, a petal extending radially inward with respect to the central axis of the seal ring, and a sealing disk axially proximate the seal ring. The sealing disk may have a seal shoe configured as a primary seal. The petal may extend toward the seal shoe.Type: GrantFiled: January 9, 2019Date of Patent: March 29, 2022Assignee: Raytheon Technologies CorporationInventors: Michael G. McCaffrey, John R. Farris, Theodore W. Hall, John J. Korzendorfer, Elizabeth F. Vinson, Jeffrey Michael Jacques, John E. Paul, Ross Wilson, Edwin Otero, Alan W. Stoner
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Patent number: 11286992Abstract: A sealing boot for sealing a joint of 8 & 8¼ front differentials, where the sealing boot comprises a first sealing boot section having a first cylindrical inside surface. The first sealing boot section is adapted for being tightly fitted to a shoulder section of an end portion of a differential output shaft protruding a housing of the 8 & 8¼ front differential. The shoulder section is disposed between a male spline and the housing. A second sealing boot section has a second cylindrical inside surface. The second sealing boot section is adapted for being tightly fitted to an outside surface section of an end portion of a CV axle shaft having a female spline disposed therein. The female spline being adapted for being engaged with the male spline of the differential output shaft. The sealing boot forms a sealed enclosure between the first cylindrical inside surface and the second cylindrical inside surface.Type: GrantFiled: July 23, 2019Date of Patent: March 29, 2022Inventors: Richard Bruce Rood, Rood Bruce Allen
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Patent number: 11261972Abstract: A combined sealing device with magnetic fluid includes a housing having a chamber; a rotating shaft rotatably arranged in the chamber; a seal assembly fitted over the rotating shaft and located in the chamber, in which the seal assembly includes a brush seal part, a magnetic fluid seal part, and a labyrinth seal part all fitted over the rotating shaft and spaced apart from one another in an axial direction of the rotating shaft, the brush seal part being arranged adjacent to the sealing cavity, and the magnetic fluid seal part being arranged between the brush seal part and the labyrinth seal part; and an absorption part arranged in the brush seal part and configured to adsorb a sealing medium spilled from the sealing cavity.Type: GrantFiled: October 22, 2021Date of Patent: March 1, 2022Assignee: TSINGHUA UNIVERSITYInventors: Decai Li, Yanwen Li, Zepeng Li
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Patent number: 11248703Abstract: A metal gasket which enables improvement of sealing properties by making sufficient compression of a full bead possible even if elastic coating is formed along the full bead. In the gasket (1) having a full bead (13), formed on a metal substrate (10), having a mountain-shaped protruding surface formed on one side in a thickness direction and a valley-shaped recessed surface formed on the other side in the thickness direction, elastic coating (20) is formed on the whole surface of the protruding surface of the full bead (13), and the elastic coating (20) is formed on the recessed surface of the full bead (13), except a slit-shaped elastic coating-free section (14) along a bottom section (13a) of the recessed surface.Type: GrantFiled: March 13, 2015Date of Patent: February 15, 2022Inventors: Takeo Morimoto, Misaki Gushiken
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Patent number: 11225877Abstract: The present disclosure relates generally to a sliding seal between two components. The sliding seal includes a first seal section and an uncoupled second seal section which allows the first and second seal sections to move relative to one another during relative movement between the two components. A wave spring and/or a rope seal is disposed between the first and second seal sections biases the first and second seal sections away from one another.Type: GrantFiled: February 1, 2019Date of Patent: January 18, 2022Assignee: RAYTHEON TECHNOLOGIES CORPORATIONInventors: Timothy M. Davis, Paul M. Lutjen
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Patent number: 11174946Abstract: A magnetic fluid seal includes an outer cylinder member that houses therein a rotating shaft extending from a housing of a fluid machine, magnetic pole members housed in the outer cylinder member, disposed around the rotating shaft and forming a magnetic circuit, and sealing films to be formed from magnetic fluids, in an axial direction, in magnetic connection with the magnetic circuit, and between the magnetic pole members and the rotating shaft. The magnetic fluid seal further includes a gas supply passage that allows a gas to flow from an outside toward the magnetic pole members.Type: GrantFiled: November 9, 2016Date of Patent: November 16, 2021Inventor: Kazuhiko Sato
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Patent number: 11162586Abstract: A piston ring and a method of manufacturing a piston ring for a piston of a reciprocating internal combustion engine. The piston ring comprises a body having an outer circumferential surface. A tribological coating is formed on the outer circumferential surface of the body. The tribological coating has a dual layer or a triple layer structure and includes a relatively hard base layer and a relatively porous top layer overlying the base layer. The tribological coating may be provided with varying thickness such that its thickness increases gradually from 90° towards 0° in a first radial direction of the piston ring and from 270° towards 360° in a second radial direction of the piston ring reaching its maximum value in the region of 0° and 360°, i.e. the tips of the piston ring.Type: GrantFiled: November 30, 2018Date of Patent: November 2, 2021Inventors: Jose Valentim Lima Sarabanda, Fabio Mendes de Araujo, Gisela Ablas Marques
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Patent number: 11156291Abstract: A piston ring and a method of manufacturing a piston ring for a piston of a reciprocating internal combustion engine. The piston ring comprises a body having an outer circumferential surface. A tribological coating is formed on the outer circumferential surface of the body. The tribological coating has a dual layer or a triple layer structure and includes a relatively hard base layer and a relatively porous top layer overlying the base layer. The tribological coating may be provided with varying thickness such that its thickness increases gradually from 90° towards 0° in a first radial direction of the piston ring and from 270° towards 360° in a second radial direction of the piston ring reaching its maximum value in the region of 0° and 360°, i.e. the tips of the piston ring.Type: GrantFiled: November 30, 2018Date of Patent: October 26, 2021Inventors: Jose Valentim Lima Sarabanda, Fabio Mendes de Araujo, Gisela Ablas Marques
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Patent number: 11156292Abstract: An apparatus includes a gasket and a housing assembly. The gasket may have (i) a compression region around an outer perimeter, (ii) a sloped region adjoining the compression region, (iii) a central region and (iv) a passage in communication with an exterior of the apparatus. The housing assembly may have a sealing edge and may be configured to hold a sensor. The sealing edge may compress the gasket in the compression region and in the sloped region. The sensor (a) may seal to the central region of the gasket and (b) may be in communication with the exterior of the apparatus through the passage.Type: GrantFiled: March 19, 2018Date of Patent: October 26, 2021Assignee: VEONEER US INC.Inventor: Jacob Pusheck
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Patent number: 11143232Abstract: In an exemplary embodiment of a sliding component, a sliding face S is provided with a first fluid-side negative pressure generation mechanism 12 including a first negative pressure generation groove 13, and is provided with a second fluid-side negative pressure generation mechanism 14 including second negative pressure generation grooves 15 located on the second-fluid side of the first fluid-side negative pressure generation mechanism 12, and is further provided with a dynamic pressure generation mechanism 10 including dynamic pressure generation grooves 11 on at least one of the first-fluid side and the second-fluid side of the first fluid-side negative pressure generation mechanism 12 and the second fluid-side negative pressure generation mechanism 14, and the first negative pressure generation groove 13 is isolated from the second-fluid side by a land R, and the second negative pressure generation grooves 15 are isolated from the first-fluid side by a land R.Type: GrantFiled: November 14, 2017Date of Patent: October 12, 2021Assignee: EAGLE INDUSTRY CO., LTD.Inventors: Yuta Negishi, Sayaka Kosugi, Hiroki Inoue, Hideyuki Inoue, Takeshi Hosoe, Yuichiro Tokunaga
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Patent number: 11142985Abstract: A sealing apparatus and related method for sealing an annular space between concentrically disposed members. In an exemplary embodiment, the method includes providing a sealing ring within the annular space, the sealing ring defining oppositely inclined interior and exterior surfaces each having a generally frusto-conical shape and defining opposing first and second edges, a nose adjoining the respective first edges of the interior and exterior surfaces, and a first convex surface adjoining the respective second edges of the interior and exterior surfaces opposite the nose; and forming a seal against a fluid pressure in the annular space, comprising depressing the first convex surface of the sealing ring so that the interior and exterior surfaces thereof expand radially to exert contact stress on each of the concentrically disposed members.Type: GrantFiled: February 29, 2016Date of Patent: October 12, 2021Assignee: Halliburton Energy Services, Inc.Inventors: Gary Allen Kohn, Shane Patrick Furlong, Shengjun Yin
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Patent number: 11143308Abstract: A bearing protector includes a static component fixed relative to a housing, in which a stationary sealing face profile is retained and a rotational component for fixing relative to a shaft with the static and rotational components held axially relative to each other. The rotational component has an annular sealing face profile energized by way of one or more magnetic elements retained within the static component to generate a positive sealing face contact between the stationary sealing face and rotational sealing face profiles. The magnets elements are held within recesses in the static component and extend radially inwards of the recesses.Type: GrantFiled: September 4, 2018Date of Patent: October 12, 2021Assignee: AES Engineering Ltd.Inventor: Joshua William Banks