Patents Examined by Robert S. Ward
  • Oil seal for lubricated track chain joints, particularly for track type vehicles
    Patent number: 4607854
    Abstract: In an oil seal for lubricated track chain joints, particularly for track-type vehicles, of the type with a flanged primary ring of a flexible material and a secondary ring of a resilient material, the annular portion (6) of the flanged primary ring (5) carries a metal ring (7) embedded in it.
    Type: Grant
    Filed: August 5, 1985
    Date of Patent: August 26, 1986
    Assignee: Simmel S.p.A.
    Inventors: Maurizio Bissi, Andrea Cocco, Guerrino Baggio
  • Accordian-folded boot shield for flexible swivel connection
    Patent number: 4607852
    Abstract: A flexible swivel boot connector for connecting a first boot shield section to a second boot shield section, both first and second boot sections having openings therethrough, the second boot section having at least two adjacent accordian folds at the end having the opening, the second boot section being positioned through the opening of the first boot section such that a first of the accordian folds is within the first boot section and a second of the accordian folds is outside of the first boot, includes first and second annular discs, the first disc being positioned within and across the first accordian fold, the second disc being positioned within and across the second accordian fold, such that the first boot section is moveably and rigidly connected between the first and second accordian folds of the second boot section.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: August 26, 1986
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Joseph C. Hoh
  • Method of making composite wire mesh seal
    Patent number: 4607851
    Abstract: A high temperature seal, particularly suitable for use in vehicle engine exhaust systems, is formed of a composite structure including refractory sheet material and wire mesh. In a typical application, the seal is disposed between confronting ends of an engine exhaust manifold pipe and an exhaust tail pipe, and permits relative rotation of the pipes without impairment of the effectiveness of the seal, thereby preventing leakage of high temperature exhaust gases passing through the joined pipes.
    Type: Grant
    Filed: November 30, 1977
    Date of Patent: August 26, 1986
    Assignee: Metex Corporation
    Inventor: Peter P. Usher
  • Sealing cap for use in internal cleaning of can fillers
    Patent number: 4607853
    Abstract: A sealing cap for use in sealing the can filling head of can filling apparatus to allow cleaning fluid to be pumped through the head. The sealing cap closes off the head in substitution for a can and comprises a sealing member rotatably mounted within a threaded retaining ring adapted to be screwed onto a threaded outer surface of the can filling head. This configuration allows easy fitment of the sealing cap during head cleaning operations.
    Type: Grant
    Filed: September 18, 1984
    Date of Patent: August 26, 1986
    Assignee: Scottish & Newcastle Breweries PLC
    Inventor: Stuart Nicol
  • Composite machine housing and seals therefor
    Patent number: 4606547
    Abstract: Two components of the housing of a centrifugal pump have adjoining surfaces and define an opening for an annular insert which surrounds a rotary shaft. The insert is surrounded by a sealing ring which is biased into sealing engagement with the peripheral surface of the insert and against the adjacent internal stops of the two components by a two-piece ring under the action of screws which mate with the insert and are caused to urge the two-piece ring against the sealing ring. The adjoining surfaces of the two components are grooved at the opposite sides of the insert and receive rope-like sealing members which are in sealing contact with the adjoining surfaces of the two components under the action of bolts which urge the two components toward each other. The sealing ring has recesses which sealingly receive the adjacent end portions of the sealing members.
    Type: Grant
    Filed: February 27, 1985
    Date of Patent: August 19, 1986
    Assignee: Klein, Schanzlin & Becker Aktiengesellschaft
    Inventor: Armin Gorisch
  • Mechanical seal assembly with orientation maintaining means
    Patent number: 4605234
    Abstract: A mechanical seal assembly for use with a rotatable shaft passing through a housing wherein the assembly includes a flowable material filled ring member acting in cooperation with a stationary sealing member and a sealing member positioned around the shaft to maintain the sealing members in fluid-tight sealing relationship with each other.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: August 12, 1986
    Inventor: Maurice E. Metcalf
  • Cylinder head gasket construction
    Patent number: 4605236
    Abstract: An improved gasket where the openings in the gasket which fit around the cylinder bores is provided with a grommet which is generally U-shaped in cross-section, having spaced ends at least one of which is bent inwardly to engage the bore wall of the grommet to securely hold the grommet in place in the gasket opening.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: August 12, 1986
    Assignees: Hino Jidosha Kogyo Kabushiki Kaisha, Marusan Packing Manufacturing Co.
    Inventors: Keiichi Tsuchihashi, Shinji Yamada, Makoto Arakawa, Osamu Aizawa, Nobuyuki Otomo
  • Shaft and radially-sealing ring with cold flexed seal disk
    Patent number: 4603866
    Abstract: The inside of a planar, annular disk having a thickness of from about 0.8 to about 2 mm is cold flexed into a cylindrical, sealing stub about a shaft. For this, the inside diameter of the disk before cold flexing about the shaft is from about 1 to about 6 times the thickness of the disk less than the diameter of the shaft. A stiffening ring is sealingly attached about the outside of the disk with the line of the innermost attachment therebetween being from about 1.1 to about 4 times the thickness of the disk from the surface of the shaft.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: August 5, 1986
    Assignee: H. Weissenfeld-Richters
    Inventors: Dieter Fuchs, Wolfgang Schmitt
  • Sealing arrangement for knife gate valves
    Patent number: 4603864
    Abstract: A valve seat in a knife gate valve is positively retained between a liner and a retaining ring.
    Type: Grant
    Filed: June 14, 1985
    Date of Patent: August 5, 1986
    Assignee: Red Valve Company, Inc.
    Inventor: George S. Raftis
  • Drive motor gear lubricant seal for locomotives and the like
    Patent number: 4603865
    Abstract: A novel seal member for a known drive system of the type used in General Motors diesel locomotives and the like which is applicable between the outer seal member of the traction motor and an associated pinion and provides a lip seal to reduce escape of lubricant through migration up the armature shaft and a return duct for conducting lubricant from drain openings of an internal labyrinth seal back into the gear case while blocking any interfering lubricant flow generated by gear action from impinging upon the drain openings and being forced out of the gear case.
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: August 5, 1986
    Assignee: General Motors Corporation
    Inventor: Paul R. Bien
  • Annular blowout preventer with upper and lower spherical sealing surfaces and rigid translation element
    Patent number: 4602794
    Abstract: An annular blowout preventer for use on an oil or gas well rig having a lower housing, an upper housing, a resilient sealing means, a vertical bore coaxially positioned through the housing and a vertically acting piston for actuating the sealing means in which the inner surface of the upper housing and the inner surface of the lower housing are concentric spherical surfaces extending to the bore. The resilient sealing means includes steel segments extending between the top and bottom of the sealing means and the top and bottom of the sealing means and the steel segments have spherical surfaces coacting with the spherical surfaces on the upper and lower housings. The upper and lower housings each include a vertical wall extending downwardly from the spherical surfaces on the upper and lower housing and the vertical moving piston sealingly engages the vertical walls.
    Type: Grant
    Filed: May 18, 1984
    Date of Patent: July 29, 1986
    Assignee: NL Industries, Inc.
    Inventors: Gary R. Schaeper, Richard A. Olson
  • Dual function gasket with dual lips and optional locking ring
    Patent number: 4602792
    Abstract: A dual function gasket adapted for insertion into a suitable groove formed in the bell of an associated pipe includes an annular gasket body made of a resilient material. The body terminates radially inwardly in a leading lip and a pressure activated sealing lip spaced rearwardly therefrom. An annular groove is provided in the gasket body and an annular locking ring may be selectively inserted into the groove. The ring is made of a material harder than the gasket body and is inserted into the groove when a high pressure seal is desired. The ring may be removed when only a low pressure seal is desired.
    Type: Grant
    Filed: October 9, 1984
    Date of Patent: July 29, 1986
    Assignee: Polymer/Raymond Industries
    Inventor: William C. Andrick
  • Thermally expansive slip joint for formed sheet metal seals
    Patent number: 4602795
    Abstract: A metallic seal ring which has a gap between its ends to allow for thermal expansion, the gap being closed by a slip joint fitting within the ends of the ring and secured at one end only to one end of the ring with lthe other end of the joint free to slide within the ring and with the shape of the joint conforming in general to that of the seal ring.
    Type: Grant
    Filed: December 6, 1985
    Date of Patent: July 29, 1986
    Assignee: United Technologies Corporation
    Inventor: Herbert J. Lillibridge
  • High pressure seal assembly
    Patent number: 4602791
    Abstract: A seal assembly for sealing two relatively movable parts against fluid leakage comprises a seal ring of compressible material mounted on one of the parts, and a supporting ring of non-compressible material positioned in an axial annular groove in said seal ring, said groove being open towards the annular gap to be sealed and surrounded by an annular web, said supporting ring being arranged to be radially displaceable in that groove with limited elastic deformation of said annular web.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: July 29, 1986
    Assignee: Bran & Lubbe GmbH
    Inventor: J. Peter Zollner
  • Gasket with encapsulated locking ring
    Patent number: 4602793
    Abstract: A gasket assembly suitable for sealing between two pipe members in a high pressure pipeline includes an annular gasket body made of a resilent material. The body terminates radially inwardly in a leading lip and a pressure actuated sealing lip. The leading lip has a pipe centering and cleaning face and a compression sealing face. An enclosed annular groove is provided in the gasket body with an annular retaining ring being provided in the groove. The ring is made of a material harder than the gasket body and functions to retain the gasket body in the pipe groove.
    Type: Grant
    Filed: October 9, 1984
    Date of Patent: July 29, 1986
    Assignee: Polymer/Raymond Industries
    Inventor: William C. Andrick
  • Well conduit joint sealing system
    Patent number: 4602796
    Abstract: A system and apparatus useful in establishing a metal to metal seal between members in wells. A milling tool is used to cut and/or finish a seat on a shoulder in pipe or tools in the well, which will mate and seal with metal seal surfaces on seal units lowered into the well. One seal unit has elastomeric seals in addition to the metal seals.
    Type: Grant
    Filed: June 29, 1984
    Date of Patent: July 29, 1986
    Assignee: Otis Engineering Corporation
    Inventor: John R. Setterberg
  • Hat-shaped shaft seal of multiple layered material
    Patent number: 4601475
    Abstract: An annular seal primarily for use in preventing leakage of liquids and gases along rotating and/or reciprocating shafts where the latter pass through support structures such as plates and casings. The annular seal (3) is characterized in that it has the shape of a hat with an axially apertured crown (3a) and an adjoining brim (3b) each comprised of a plurality of alternately interleaved layers of sheet metal (M) and of a non-metallic material (G) selected from expanded graphite, carbon, natural or synthetic rubber or bonded fibrous material. Such a seal can also be used in the sealing of a butterfly valve when in its closed position.
    Type: Grant
    Filed: October 17, 1985
    Date of Patent: July 22, 1986
    Inventor: Terence P. Nicholson
  • Squeak free seal for exhaust couplings
    Patent number: 4601476
    Abstract: A heat cured exhaust seal, adapted to be interposed between a pair of confronting pipes in sealing relationship therewith, is formed of wire mesh having openings between the wires thereof and a mixture of metallic fibers, non-metallic filler, a thermally stable lubricant and resin binder, which mixture surrounds the wires and substantially fills the openings in the mesh and forms the seal. The method of forming the seal includes placing a preform of wire mesh into a die cavity, forming a powder mixture of metallic fibers, non-metallic filler, a thermally stable lubricant and a resin binder, placing the powder mixture into the die cavity, pressing the wire mesh and powder mixture to the final size and shape of the seal and curing the seal at an elevated temperature.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: July 22, 1986
    Assignee: Metex Corporation
    Inventors: Peter P. Usher, Eugene J. Gavaletz
  • Flexible brush-type seal with layered moving sealing surface
    Patent number: 4600202
    Abstract: A brush-type seal between machine components in relative motion one with respect to the other, of which at least one member rotates, in which the strands or bristles consist of composite fibers designed for good thermal conductivity in at least portions of their surface and at least the core has flexible, elastic properties. The plurality of bristles are made of combinations of glass and metal or ceramic or plastic materials and various manufacturing processes and arrangements may be used. The fibers are densely combined, massed, bundled or associated otherwise, preferably radially retained or arranged to advantage in annular brushes. The brush seals such as fluid seals are arranged in a particular application on the stator or rotor of a machine, preferably a turbomachine. This brush-type seal is applicable to seal two chambers under different pressure.
    Type: Grant
    Filed: August 8, 1985
    Date of Patent: July 15, 1986
    Assignee: MTU Motoren - und Turbinen-Union Muenchen GmbH
    Inventors: Arthur Schaeffler, Klemens Werner
  • Impregnated flat sealing gasket and method of making the same
    Patent number: 4600201
    Abstract: A method of making a flat gasket comprising a non-woven mat having opposite faces, including the steps of impregnating the mat with a polymerizable liquid impregnating agent and applying to at least one part of at least one mat face a coating containing a polymerizable polymer material. The coating is applied to the impregnated mat prior to polymerization of the impregnating agent. The impregnating agent and the coating are simultaneously polymerized in one operation.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: July 15, 1986
    Assignee: Goetze AG
    Inventors: Klaus Lonne, Klaus-Peter Majewski, Hans-Rainer Zerfass