Patents Examined by Robert S. Ward
  • Patent number: 4817967
    Abstract: A sealing structure for providing a relatively leak-proof seal between the junction of two gaskets which are disposed at an angle relative to one another is disclosed. A first gasket is interposed between two pieces of a first component of a vehicle engine or other device. When the two pieces are assembled together, the first component defines a surface adapted to mate with a corresponding surface formed on a second component of the device. An edge of the first gasket extends beyond the mating surface of the first component. The edge of the first gasket includes a plurality of outwardly extending projections formed integrally therewith. A second gasket is interposed between the mating surfaces of the first and second components. The second gasket includes a plurality of recesses formed in a face thereof, each of which corresponds to one of the projections formed in the first gasket.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: April 4, 1989
    Assignee: Dana Corporation
    Inventor: Jerome G. Belter
  • Patent number: 4815750
    Abstract: A metallic gasket, such as for an internal combustion engine, wherein an elastic metallic plate has a pair of combustion chamber holes therethrough in adjacent relationship. Annular sealing beads are formed on the gasket in surrounding relationship to the combustion chamber holes. The beads are disposed closely adjacent so that they substantially overlap in the region between adjacent holes. At the junctions where the adjacent beads meet, the bead width is approximately equal to the bead width in the region between the junctions and in the remaining annular parts of the beads.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: March 28, 1989
    Assignee: Nihon Metal Gasket Kabushiki Kaisha
    Inventor: Nobuo Yoshino
  • Patent number: 4815748
    Abstract: In a shaft seal for hydrogen-cooled, turbo-generators, the operating requirements for a minimum gas-side leakage flow without secondary liquid circuit and cooling of the entire axial ring length are fulfilled either with choke elements (8) or with an inner transfer of sealing liquid from the gas side (G) to the air side (L) so that this shaft seal can function with a single sealing liquid circuit as a so-called single-circuit seal in parameter areas which are at present still the preserve of a multi-circuit seal.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: March 28, 1989
    Assignee: BBC Brown Boveri AG
    Inventor: Johann Schubert
  • Patent number: 4813692
    Abstract: A pressure balanced sealing ring having a substantially S-shaped, resilient cross section including two oppositely facing convolutions, a central leg coupling the convolutions and a pair of outer legs, each extending from one of the convolutions. The ring is advantageously formed of metal and seals against opposed axially facing but offset surfaces in an annulus between two concentic pipes or opposed axially facing surfaces at the interface formed by two aligned pipes. Each outer leg has a substantially circular sealing line, these sealing lines being radially offset from one another, adjacent the free distal edge of each leg, and spaced from the convolutions, In a modified embodiment, the sealing ring has more than two convolutions and additional legs to connect them. In another series of modified embodiments, the sealing ring has one or two restraining rings rigidly coupled to one or both of the outer legs to ensure the desired direction of torsional deflection under the action of the differential pressure.
    Type: Grant
    Filed: January 21, 1987
    Date of Patent: March 21, 1989
    Assignee: EG&G Pressure Science, Inc.
    Inventors: Horace P. Halling, Robert A. Barrett, Mark E. Woozley
  • Patent number: 4813689
    Abstract: A seal between a first component (1') formed by the stationary component (2'). The first component is provided with a radially outwardly projecting annular disc (3') which grips around a ring housing (4') having a U-shaped cross section and being sealed against the second component by a compensator (7'). The inner faces of the two side walls (4'a, 4'b) of the housing are provided with concentrically arranged annular grooves (4d). A sealing ring (5) of an elastically yielding sealing material and an elastically bendable supporting ring (11) are arranged in the annular grooves so as to be axially displaceable. One side of the supporting ring lies against the sealing ring (5) while its other side is supported on springs (12) which press the sealing ring against the annular disc.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: March 21, 1989
    Assignee: Feodor Burgmann Dichtungswerke GmbH & Co.
    Inventors: Winfried Stalter, Manfred Rehmann
  • Patent number: 4811958
    Abstract: A sealed shaft for use in an evacuated chamber in which the shaft can be moved by control from outside the chamber while maintaining the seal around the shaft.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: March 14, 1989
    Assignee: North American Philips Corporation
    Inventor: George Katz
  • Patent number: 4811957
    Abstract: A device and a method for forming at least a liquid tight joint between two elements. Either or both elements have sealing portions, which in an area intended for abutment of the elements provide said joint when said elements are brought together in the abutment area. The sealing portion is formed as a seal which by being formed by sequential injection moulding technique is molecularly integral with an area directly adjacent to said seal. The injection moulding technique allows a choice of a relatively softer material for the sealing portion and a high degree of design freedom, including designs of high hygiene standards, especially well suited for aseptic or sterile packaging systems.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: March 14, 1989
    Assignee: AB Akerlund & Rausing
    Inventors: Magnus Bergstrom, Per-Stefan Gersbro, Jan-Olof Fransson
  • Patent number: 4811961
    Abstract: A seal for use in sealing an annular opening between a stationary member and a rotating cylinder telescopically arranged with the stationary member, the seal comprising a series of partially overlapping members circumscribing the cylinder adjacent the stationary member and closing the annular opening. The seal comprises a series of self-biasing leaf members attached to the stationary member and being biased into sealing engagement with the rotating member and a series of blanket members positioned adjacent the seal members to prevent leakage from the gaps between adjacent leaf members to substantially seal the annular opening between the rotating and stationary members.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: March 14, 1989
    Assignee: Boliden Allis, Inc.
    Inventor: John T. Williams
  • Patent number: 4809993
    Abstract: A housing has an opening therein, a rod extends within the opening in the housing, and an annular seal arrangement is provided around the rod within the opening for effecting a fluid seal between the housing and the rod with respect to a fluid pressure which is present at a location along the rod on one axial side of the seal arrangement. The seal arrangement includes an annular washer part which is provided closely around the rod and an annular sleeve part axially adjacent the annular washer part, the annular sleeve part having an inside dimension which is less than an outside dimension of the washer part and which is substantially greater than an inside dimension of the washer part and an outside dimension of the rod. The washer part is located on a side of the sleeve part axially remote from the location at which the fluid pressure is present.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: March 7, 1989
    Inventor: Terrance L. Henshaw
  • Patent number: 4809989
    Abstract: An improved sealing device, which when positioned inside a flow conductor and operated, compresses and expands an improved resilient element into fluid sealing engagement between the sealing device and the inside of the flow conductor. The sealing device is provided with centralizing lugs, which automatically extend to centralize the improved resilient element on sealing engagement in the flow conductor, assuring an increased pressure resistant seal. The improved resilient element has end supports including a reinforced coil spring in each end to prevent pressure extrusion of the resilient material and when sealingly engaged, functions as a cup type sealing element. Two forms of wire reinforcement for the coil spring are disclosed, both of which provide further increased resistance to pressure sealed. The improved sealing element may be provided with an outer layer of softer resilient material to assure sealing in rough flow conductors.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: March 7, 1989
    Assignee: Otis Engineering Corporation
    Inventor: Dickie L. Kernal
  • Patent number: 4809994
    Abstract: A gasket system for providing a fluidtight joint between a manhole riser and a sewer pipe. The gasket is formed with a mounting portion which is generally cylindrical, and provides an anchoring projection extending radially from the outer side thereof. A sealing projection is joined to the mounting portion by a hinge section. The sealing projection is placed in compression when the gasket is formed into a circle, and becomes bistable. In one position of stability, the sealing projection is substantially aligned with the mounting portion, and in the other position of stability, the sealing projection is located generally within the mounting portion. The gasket is positioned around a core, with the sealing projection aligned with the mounting portion, and is cast into an opening provided by the material of the manhole riser. In such position, the sealing projection is partially embedded within the material of the riser.
    Type: Grant
    Filed: October 16, 1986
    Date of Patent: March 7, 1989
    Assignee: Press-Seal Gasket Corporation
    Inventors: James W. Skinner, Fouad M. Deeb
  • Patent number: 4807892
    Abstract: A steel laminate gasket of the invention is used for an internal combustion engine having at least one hole therein. The gasket comprises a first plate and a second plate situated adjacent to the first plate. The first plate is provided with at least one first hole corresponding to the hole of the engine and a first bead situtated adjacent to the first hole to surround the same. The second plate is provided with at least one second hole having a size substantially larger than an area that the first bead surrounds, and a second bead situated adjacent to the second hole to surround the same. When the first and second plates are assembled, the first bead is located inside the second hole, and the second bead abuts against the first plate.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: February 28, 1989
    Assignee: Ishikawa Gaskit Co., Ltd.
    Inventor: Tsunekazu Udagawa
  • Patent number: 4805921
    Abstract: A mechanical shaft joint boot integrally made up of a large-diameter ring portion and a small-diameter ring portion with a bellows portion interposed therebetween, and a straight portion connecting the bellows portion with the large-diameter ring portion. The distance 11 between the large-diameter ring portion and the small-diameter ring portion is smaller than the distance l2 between a large-diameter ring mounting portion and a small-diameter ring mounting portion of the joint, and the outside diameter of a first crest of the bellows portion is not larger than the inside diameter of the straight portion. Accordingly, when a shaft of the joint inclines to cause inclination on one side of the boot, a surface pressure being imposed on the first crest is not increased correspondingly, thereby suppressing its wear and enhancing service time of the boot.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: February 21, 1989
    Assignees: Toyoda Gosei Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Mikio Ukai, Takashi Furukawa, Yasuo Hojo
  • Patent number: 4805920
    Abstract: A seal and closure member of elastomeric material adapted to be cast in situ and comprising a cylindrical body portion and an integral frusto-conical skirt therewithin. A radially outwardly extending flange is embedded in adjacent concrete. The skirt has a knock-out web at its smaller diameter end portion and the seal and closure member may thus be employed selectively as closure members for apertures in distribution boxes and the like and as seals for pipes in communication with the box interiors. The seal also includes integrally formed bosses which allow a baffle to be secured directly thereon on the interior of the box opposite the end of a pipe in the seal.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: February 21, 1989
    Inventor: Norman Gavin
  • Patent number: 4804195
    Abstract: A gas-tight seal for rotating high-temperature devices, comprising one or two seals of the labyrinth type, located on opposite sides of a hopper through which the shaft passes. Each labyrinth uses a plurality of rings as seal members. One set of the rings, separated by ring-shaped spacers, is rigidly attached to the hopper wall where the shaft passes into the hopper. The other set, of smaller diameter and interfitted with the first set, is slidingly fit to the rotating shaft, possibly with driving splines, but not fastened rigidly to either the shaft or the hopper. In an alternate embodiment, the spacer rings are replaced with graphite rings which contact both the stationary and rotating rings. The hopper is filled with particulate solid matter which is capable of withstanding the temperatures to be encountered, such as mica flakes or graphite flakes, or ash or char. The particulate matter forms a seal around the shaft itself, and fills the gaps in the labyrinth.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: February 14, 1989
    Inventor: Thomas H. Parker
  • Patent number: 4799693
    Abstract: A face seal has a sealing ring (7) with a frusto-conical margin (12) diverging from the plane of the contact band (8), so as to define a sealing region (13) which enlarges toward the sealed side "S," and a peripheral shoulder (14) which has a non-constant axial clearance from the counter-face to produce liquid pulsation which slightly reciprocates the sealing ring to effect, by displacement pumping, positive action toward the sealed side.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: January 24, 1989
    Assignee: George Angus & Company Limited
    Inventor: David E. Johnston
  • Patent number: 4799694
    Abstract: A piston ring assembly has an expander spring of sheet material bent into an annular configuration. The expander spring has a circumferential series of radially oriented tongues and each tongue has an approximately axially bent leg. The tongues and legs are defined by stamped-out slots provided in the expander spring in an alternatingly radially inwardly and radially outwardly oriented circumferential series. The expander spring has stamping burrs bounding the slots. The piston ring assembly further has two laminar oil scraper rings arranged generally concentrically with respect to the expander spring. The laminar oil scraper rings are axially supported by the tongues and are radially supported by the legs. The burrs are situated such that they are submitted solely to compression forces derived from bending stresses generated as a result of bending the spring into the annular configuration.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: January 24, 1989
    Assignee: Goetze AG
    Inventor: Bert Brauers
  • Patent number: 4798392
    Abstract: A hollow metallic sealing ring which in radial cross-section is of serpentine shape with a pair of divergent limbs connected by at least one contiguous single loop with substantially straight sides. The transition curve between the sides of the loop and the divergent limbs is of constant radius and the free ends of the limbs are straight and substantially parallel.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: January 17, 1989
    Assignee: Heat Transfer Technology Ltd. (Jersey)
    Inventor: Michael J. C. Tozer
  • Patent number: 4796898
    Abstract: Oil scraping piston ring of profiled steel having punched-in oil vent holes. To keep at a minimum the bulging at the holes developed during coiling, the oil vent holes are given an elliptical or rhombic outline.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: January 10, 1989
    Assignee: Goetze AG
    Inventors: Bert Brauers, Martin Morsbach
  • Patent number: 4796899
    Abstract: A method and device which provide a liquid-tight seal between a length of pipe, a housing, or other hollow structure and cured concrete in which the structure is embedded. A foamed polymeric sealing element is bonded about a portion of the exterior surface of the structure, and gunnite or concrete is cast about the structure and the sealing element. The interface of the concrete and the foamed polymeric sealing element become substantially permanently sealingly engaged. The method and device are particularly useful in the construction of swimming pools or similar fluid-containing vessels in which pipes or housings penetrate cast walls meant to confine water or other fluids. The method and device may also be used to form seals about structures penetrating cast foundations, dams, bulkheads, retaining walls, cisterns and basement walls.
    Type: Grant
    Filed: February 2, 1987
    Date of Patent: January 10, 1989
    Inventors: Robert S. Herrick, Gary E. Webb