Patents Examined by Robert I. Smith
  • Patent number: 4682779
    Abstract: An explosively driven latch-and-seal device for latching and sealing the ends of two telescoping members, such as a fixed nozzle section 14 and an extendible nozzle section 16 of a rocket engine. The forward end of the extendible nozzle 16 is formed with an axially extending flange 24. The rear end of the fixed nozzle 14 is formed with a radially extending projection 18 which has a recess 20 in its outer surface adjacent to the extendible nozzle flange 24. An explosively expandable tube (EET) 30 containing a mild detonating fuse (MDF) 32 is placed in contact with the flange 24 in such position with relation to the recess 20 that, when the MDF 32 is detonated, it expands to force the flange section in contact with it into the recess 20. A seal is formed between the deformed section of the flange 24 and the wall of the recess 20.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: July 28, 1987
    Inventors: Robert A. Feight, Vance W. Jaqua, Joseph Trom, Jr.
  • Patent number: 4618152
    Abstract: An elongated metallic strip is provided which has oppositely disposed convolutions constituted by sinuosities, corrugations, nodes, or the like, and said convolutions are constituted by nadir and zenith convolutions. Provided on the nadir and zenith convolutions are cooperative hinge and locating means assisting in the juxtaposition of said nadir and zenith convolutions to one another, said integral hinge means being provided thereon to facilitate the disposition of such strip into a helical configuration. A seal is provided which is created by helically winding the strip to locate edges thereof in a cylindrical sealing configuration by juxtaposing the convolutions of the strip in operative relationship with one another and welding said convolutions to one another.
    Type: Grant
    Filed: January 13, 1983
    Date of Patent: October 21, 1986
    Assignees: Thomas P. Mahoney, Donald A. Ruston, Robert S. Barnes
    Inventor: James R. Campbell
  • Patent number: 4605235
    Abstract: A shaft seal assembly (2) for a fuel pump includes a seal housing (4) attached to the fuel pump housing (6). A drive shaft (10) mounted for rotation in the fuel pump housing has a sealing face (14) which is engaged by a thrust face (42) of a thrust member (40) and by a seal face (18) of a carbon face seal (20). The thrust member and the carbon face seal are positioned with a steel carrier (26) mounted in the seal housing. A universal washer (32) is located between the carrier and the rear wall of the seal housing so that the carrier may undergo universal movement in response to movements of the thrust member. Misalignments between the axis of the shaft and the axis of the seal housing result in corresponding movements of the thrust member and the carrier which enable the axis of the face seal to remain aligned with the axis of the shaft.
    Type: Grant
    Filed: September 12, 1984
    Date of Patent: August 12, 1986
    Assignee: Chandler Evans Inc.
    Inventors: Jack G. Sundberg, Paul L. Haynes, Jr.
  • Patent number: 4603981
    Abstract: A device for regulating or respectively limiting the temperature provided an electric heating element in cooking apparatus. At least one temperature sensor is provided for regulating or respectively limiting the temperature, the sensor having a rod of high thermal expansion which is disposed in a tube of low thermal expansion, the tube being held between holding elements. A support member adjoins each end of the tube and surrounds the rod. The holding elements are alongside each of the support members. The support member has a coefficient of thermal expansion .alpha..sub.1 which is smaller than a coefficient of thermal expansion .alpha..sub.2 of the adjoining holding element and larger than the coefficient of thermal expansion .alpha..sub.3 of the tube.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: August 5, 1986
    Assignee: Electrovac, Fabrikation elektronischer Spezialartikel Gesellschaft m.b.H.
    Inventor: Karl Lieberth
  • Patent number: 4596395
    Abstract: An annular seal of the cup packing type having a first annular section formed from a generally non-flexible, generally non-resilient material and having an annular, radially projecting flange portion and a first axially extending skirt portion, and a second annular section having a second axially extending annular skirt portion defining a sealing surface and comprised of a generally flexible, generally resilient material, the second section being generally axially displaced from the flange portion, said first and second skirt portions being adjoined, preferably by bonding to one another.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: June 24, 1986
    Assignee: Utex Industries, Inc.
    Inventor: H. T. Miser
  • Patent number: 4596394
    Abstract: A cartridge seal has concentric outer and inner rings which snap together relatively rotatably to form the cartridge. Each ring has a generally L-shaped, inner axial profile with generally axial and radial legs thereof oppositely disposed. A sealing lip on the radial leg of the outer ring sealingly bears against an abutment surface on the radial leg of the inner ring to accommodate radial excursions during relative rotation therebetween. At least the radial leg of the inner ring is made of a material, for example metal, which conducts heat well. Frictional heat of the sealing lip against the abutment upon relative rotation is thus conducted to the surface of the radial leg of the inner ring opposite the abutment surface for dissipation. Heat dissipation is further improved with depressions in the opposite surface for expanding its surface area and, if the depressions are radial grooves, circulating a fluid medium wetting the surface to carry away the dissipated heat.
    Type: Grant
    Filed: March 22, 1985
    Date of Patent: June 24, 1986
    Assignee: Firma Carl Freudenberg
    Inventor: Wilhelm Schmitt
  • Patent number: 4595208
    Abstract: This invention relates to a lining of non-metallic material for inlet ports and outlet ports of a frame plate and/or a pressure plate of a plate heat exchanger.The lining comprises a cylindrical part (10) and at least one but preferably two flanges (11, 12). In this connection the flange (11) that is intended to be positioned between a heat exchanger plate and a frame plate and/or a pressure plate is so thin that no machining of the latter needs to be done.
    Type: Grant
    Filed: May 7, 1984
    Date of Patent: June 17, 1986
    Assignee: Alfa-Laval AB
    Inventors: Nils A. Jonsson, Bengt Mossberg
  • Patent number: 4593914
    Abstract: A wellhead sealing system comprises a casing, a tubing spool and a bushing between the casing and tubing spool. A first recess is provided in the bushing and a first casing seal is mounted therein to act between the bushing and the casing. A second recess is provided in the tubing spool and a first bushing seal is mounted therein to act between the tubing spool and the bushing. The casing seal has cylindrical inside and outside surfaces located generally at the inside and outside diameters of the seal. The cylindrical inside surface is defined by a radially inwardly extending convex central protuberance and opposed cylindrical flat surface areas extending axially outwardly from the convex central protuberance into first transition areas extending to respective end surfaces. The outside surface is defined by a circumferential centrally located groove flanked by axially outwardly extending flexible retaining flanges forming second transition areas between the cylindrical outside surface and the end surfaces.
    Type: Grant
    Filed: September 13, 1983
    Date of Patent: June 10, 1986
    Assignee: Bralorne Resources Limited
    Inventor: Clarence W. Johnson
  • Patent number: 4593918
    Abstract: A sealing arrangement for a ball-shaped or planar rotary valve of an internal combustion engine comprises a hollow sealing body mounted for rotation in a gas channel of the cylinder head and sealingly engaging the outside sealing surface of the rotary valve. A backside surface of the sealing body turned away from the combustion chamber is permanently exposed to the gas pressure therein in order to urge the sealing body inwards against the rotary valve with a sealing force dependent on the momentary gas pressure.
    Type: Grant
    Filed: July 11, 1984
    Date of Patent: June 10, 1986
    Inventor: Alfred Geissler
  • Patent number: 4593917
    Abstract: A seal system for a spherical joint in which the metal seal ring is sandwiched coaxially between two wedge-shaped metal compression rings which are inserted into corresponding cavities in the front surfaces of the seal ring and are pressed against a metal stop ring by a series of flat springs which become preloaded as a result of forcing the female part of the joint onto the male part.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: June 10, 1986
    Assignees: Nuovo Pignone S.p.A., Snam S.p.A.
    Inventors: Gian P. Ferrari Aggradi, Giampaolo Bonfiglioli
  • Patent number: 4592663
    Abstract: A vibratory temperature transducer includes a pair of elongate, generally parallel bars coupled together at one end in a type of tuning fork arrangement. The bars each have a thickness of t, a width of w and a length between free and fixed ends of L. The distance between the free end and the point where the bars are coupled together is m. Apparatus is provided to cause the bars to vibrate in torsional opposition, where the frequency of vibration is generally a function of temperature. Apparatus is also provided for determining the frequency of vibration of the bars so that when the bars are subjected to a change in temperature, the temperature can be readily determined by simply determining the magnitude of the frequency change. By careful determination of the dimensions L, m, t and w, spurious modes of oscillation of the transducer, which cause a reduction in the mechanical Q and thus an erroneous reading of temperature, are avoided.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: June 3, 1986
    Assignee: Quartex, Inc.
    Inventors: Errol P. EerNisse, Robert B. Wiggins
  • Patent number: 4592557
    Abstract: A ferrofluid rotary-shaft seal apparatus of extended seal life suitable for use as an exclusion seal in vacuum or other demanding applications which seal apparatus comprises:(a) an annular permanent magnet adapted to surround the rotary shaft to be sealed and having poles of opposite polarity at each end; and(b) a series of spaced magnetically permeable, pole-piece elements in a magnetic-flux relationship with the one and other ends, respectively, of the permanent magnet, each pole piece having a one end and another end and adapted to surround the rotary shaft to be sealed and to form a cavity there between, the inside diameter surfaces of the stationary magnetically permeable pole piece elements comprising a plurality of spaced magnetic pole piece elements each of which acts as a separate path for magnetic flux there being ferrofluid magnetically captured between the inside diameter of each circular pole piece said ferrofluid breaching the small gap between the inside diameter of said circular pole piece and
    Type: Grant
    Filed: February 7, 1985
    Date of Patent: June 3, 1986
    Inventor: Arthur H. Iversen
  • Patent number: 4592665
    Abstract: Methods and apparatus for measuring a non-thermal physical parameter with temperature sensitive elements impart a predetermined temperature sensitive elements, while measuring the physical parameter therewith. The same termperature-sensitive elements are employed for effecting a measurement of environmental temperature variation, and such temperature-sensitive elements are restored to their predetermined temperature in response to that measurement of environmental temperature variation effected with these temperature-sensitive elements.
    Type: Grant
    Filed: May 14, 1984
    Date of Patent: June 3, 1986
    Assignee: Transamerica Delaval Inc.
    Inventor: Desmond Wheable
  • Patent number: 4592661
    Abstract: A heat stress monitor comprised of a thermometer tube having at least a black globe-bulb and a wet-bulb therein and adapted to provide a direct reading of wet-bulb globe temperature (WBGT). The inclusion in the tube of a dry-bulb makes the monitor particularly adapted to measuring WBGT outdoors. The thermometer tube is in the form of a single tube and the bulbs are disposed in series therein with an extension part extending beyond the bulbs to permit a direct reading to be taken of the position of a thermally responsive medium in the tube.
    Type: Grant
    Filed: November 16, 1984
    Date of Patent: June 3, 1986
    Assignee: Dobbie Instruments (Australia) Pty. Ltd.
    Inventor: Bruce L. Wilson
  • Patent number: 4590883
    Abstract: A flag and flag mounting, the flag being formed from a strong durable material and mounted on a supporting rod clipped into a handle, the flag being retained between the handle and a knob on the rod. The handle can be inserted into a mounting block adapted to be retained between the window glass and upper frame of a vehicle door, or be attached to a mounting suction cup.
    Type: Grant
    Filed: April 7, 1983
    Date of Patent: May 27, 1986
    Assignee: Steed Signs Pty. Limited
    Inventors: Ivan V. Steed, Jeffrey I. Gill
  • Patent number: 4590680
    Abstract: A device is disclosed for sensing information relating to the orientation of a selected direction or plane with respect to the horizontal. In one embodiment, the invention comprises a housing (40), a vial (70) mounting in the housing, a source of electromagnetic radiation (62, 64), sensors (66, 68) and associated electronic circuitry, and a rail (12) for positioning the housing. The vial is elongated along a central longitudinal axis and is partially filled with liquid (72) to form a bubble (74) in the vial. The source of radiation is positioned in a housing plane to one side of the vial such that radiation passes through the vial and forms a shadow of the bubble on the other side of the vial. The shadow is detected by the sensors, and the associated electronic circuitry produces an output signal having a characteristic related to the bubble position along the longitudinal axis.
    Type: Grant
    Filed: June 13, 1984
    Date of Patent: May 27, 1986
    Assignee: Technical Designs Incorporated
    Inventors: Michael T. Hanchett, Patrick B. Stone, Kurt W. Bujack, Monte S. Strand
  • Patent number: 4589665
    Abstract: A sealing element is provided which is formed of a fluorocarbon resin sheet and radially slit into two annular overlapping flaps to receive a garter spring or the like therebetween at a location adjacent to that peripheral portion of the element which is left solid and formed with a sealing edge. Despite the limited elasticity of the seal material per se, the sealing element, finally molded into shape, has an exceedingly high ability to follow the mating surface of a rotating shaft or other member of a mechanical assembly to be sealed. The followability of the sealing element is further improved on account of the slit formation of the element.
    Type: Grant
    Filed: November 30, 1978
    Date of Patent: May 20, 1986
    Assignee: Yoshio Arai
    Inventors: Yoshio Arai, Kikuei Mukasa
  • Patent number: 4589281
    Abstract: Disclosed is a monitoring system and method for detecting the presence or absence of material at a location. The apparatus may generally be constructed to include a sensing unit, including an antenna probe for positioning at the location wherein material is to be detected, and a control unit for responding to signals from the sensing unit indicating the presence of material at the antenna probe. The control unit may include an indicator to inform an operator of the presence or absence of material at the antenna probe, and also an output which enables peripheral equipment to operate only under selected conditions at the antenna probe. The sensing signal from the sensing unit is dc, with fluctuations indicating the presence of material at the antenna probe.
    Type: Grant
    Filed: September 20, 1984
    Date of Patent: May 20, 1986
    Assignee: Keystone International, Inc.
    Inventor: Joe L. Aldrich
  • Patent number: 4588309
    Abstract: A seal assembly particularly adapted for sealing rock bit bearings is disclosed. The seal comprises an O-ring made of a resilient material which swells substantially when effectively exposed to a lubricant used for lubricating the bearing. The O-ring seal is mounted into the rock bit in a relatively low state of compression or squeeze between the surfaces to be sealed. During operation of the bit, the O-ring seal swells due to exposure to the lubricant, and consequently compression or squeeze of the seal increases substantially. The novel seal assembly compensates for undesirable compression set and wear of the O-ring.
    Type: Grant
    Filed: June 20, 1983
    Date of Patent: May 13, 1986
    Assignee: Smith International, Inc.
    Inventors: Hajime Uyehara, Rao R. Nimmagadda
  • Patent number: 4586720
    Abstract: A seal for use on the tapered section of a roll neck in a rolling mill. The seal has a flexible circular body with a circular lip and a circular flange at one end thereof. The lip extends axially from the body and the flange extends radially from the body and normal or perpendicular with respect to the body axis when the seal is in an unstressed condition. The seal is adapted to be axially received on and to be radially stressed by the tapered roll neck section with an accompanying radial expansion of the lip which produces a circumferential bending moment tending to angularly distort the flange from its perpendicular orientation to the seal axis. An internal circular shoulder on the seal body, coacts with the tapered roll neck section to counteract the bending moment and thereby prevent distortion of the flange.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: May 6, 1986
    Assignee: Morgan Construction Company
    Inventors: Thomas E. Simmons, Ralph F. Divirgilio, Charles L. Innis, Jr.