Patents Represented by Law Firm Dunlap, Codding & Peterson
  • Patent number: 4696624
    Abstract: A well-pressure operated pump having a tubular pump body provided with an interior, annular seating surface to receive a valve member mounted on a rod extending through the seating surface. An air spring in the pump body urges the rod upwardly in response to fluid pressure in the pump body and the height of the seating surface and the position of the valve member on the rod are adjustable for adjusting the well pressure at which the valve member is seated. Seal assemblies mounted on the pump body are adjustable to match the pump to the internal diameter of the well casing and the seal assemblies are provided with retainer rings having flanges that capture end portions of a sealing member of each seal assembly. A brake, having a plate that is spring loaded to overlay a shoulder in the bore of the pump body, slows the rate of descent of the pump through gases in the well. An aspirator formed in the support for the plate holds the plate off the shoulder during passage of the pump through liquids in the well.
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: September 29, 1987
    Assignee: Bassco, Inc.
    Inventors: Harold E. Bass, Richard E. Bass
  • Patent number: 4691884
    Abstract: A golf bag support formed from a tubular housing which may be attached either to the interior or exterior of a golf bag. A spike section is received within the lower end of the housing, where it may be held in a normally retracted position. A wing section abuts the spike section and extends outside the housing through an open-ended longitudinal slot formed in the end of the housing. Supported by the wing section is a pedal section, which may be depressed to drive the wing and spike sections into the ground, in order to maintain the housing and attached golf bag in an upright position. When the wing and spike sections are removed from the ground a biasing spring anchored within the housing returns the spike section to its normally retracted position within the housing. A cross member is positioned within the housing between the biasing spring and the spike section to prevent depression of the pedal section beyond the lower end of the housing.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: September 8, 1987
    Inventor: A. Philip Parduhn
  • Patent number: 4688998
    Abstract: A novel pump apparatus and method, the pump including a magnetically suspended and rotated impellor inside the pump housing. A novel sensor system detects the position of the impellor and thus provides the necessary information for operation of a suspension circuit for magnetically suspending the impellor. A valve member may be included as part of the impellor to prevent reverse flow in the event of impellor failure when used as a ventricular assist device.
    Type: Grant
    Filed: November 4, 1986
    Date of Patent: August 25, 1987
    Inventors: Don B. Olsen, Gunter Bramm, Pavel Novak
  • Patent number: 4684108
    Abstract: A modular fence construction utilizing flat bar stock for the rails and pickets, and substantially standard metal shapes for the posts between fence sections.
    Type: Grant
    Filed: September 10, 1986
    Date of Patent: August 4, 1987
    Inventor: Sergio Bergagnini
  • Patent number: 4671935
    Abstract: Method and apparatus for sterilizing contact lenses wherein the lenses are moved in a circular orbit within a microwave oven through variations of energy levels in the microwave field in the oven, with the orbit of movement being spaced from the floor of the oven.
    Type: Grant
    Filed: May 3, 1985
    Date of Patent: June 9, 1987
    Assignee: The Board of Regents for The University of Oklahoma
    Inventors: Michael D. Rohrer, Ronald A. Bulard
  • Patent number: 4664245
    Abstract: An improved coin chute assembly wherein the housing contains a coin receiving opening, a first coin exit opening, a second coin exit opening, and a coin passageway disposed therein and interconnecting the coin receiving opening with the first and second coin exit openings. The coin passageway is characterized as having an upper coin path, a coin receiving section and a coin reject section, the upper coin path being oriented to permit a coin to fall in a substantially downward direction through the chute assembly and thus through the coin receiving section towards the first coin exit opening or through the coin reject section towards the second coin exit opening. A coil having a coin slot formed therethrough is positioned around the upper coin path such that an object traveling through the upper coin path passes through the coin slot.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: May 12, 1987
    Assignee: Orin W. Coburn
    Inventors: Rex M. Maloy, John C. Moore
  • Patent number: 4664068
    Abstract: A heat generating unit for heating a liquid comprising a housing, at least one wedge, generally circularly shaped rotor, and means for rotating the rotor. The housing has a rotor cavity formed in a portion thereof with an inlet opening being formed through a portion of the housing intersecting the rotor cavity, and an outlet opening being formed in the housing intersecting the rotor cavity. Each wedge member is generally triangularly shaped in one cross section and includes a wedge base and a forward wedge wall. The rotor has an outer peripheral surface and is rotatingly disposed in the rotor cavity. The rotor has a forward face and a rearward face. Each wedge member is disposed generally between the forward face of the rotor in the forward end wall in the housing and each wedge member is positioned on the forward end wall so the wedge forward wall generally faces one direction of rotation of the rotor, the outlet in the housing is disposed generally near a central portion of the rotor.
    Type: Grant
    Filed: October 10, 1986
    Date of Patent: May 12, 1987
    Assignee: Behm, Inc.
    Inventors: Monte R. Kretchmar, Charles K. England
  • Patent number: 4662027
    Abstract: The invention concerns a repair kit for vacuum cleaners in which a vacuum cleaner housing with a worn or damaged keyway for a keying member on a brush roller is reconditioned by removing the portion of the housing with a worn keyway and substituting a U-shaped member which provides a new keyway as well as retaining slots for spring detent members. The cap member of the brush roller is provided with a keying member as well as a spring member with spring detent members.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: May 5, 1987
    Inventors: Winfred C. Parker, Randy L. Parker
  • Patent number: 4660427
    Abstract: A continuously variable transmission comprising a plurality of spokes extending radially from a spoke shaft upon which the spokes are mounted for circular movement about the spoke shaft. A driven ring is positioned relative to the spoke shaft to be engaged by one end of each spoke each time a spoke aligns with a selected direction from the spoke shaft so that movement of the spokes about the spoke shaft will rotate the driven ring by consecutive engagement of the spokes with the driven ring. The spokes are moved circularly about the spoke shaft by a rotating driving ring that extends about the spoke shaft and has a plurality of equally spaced apertures formed radially therethrough to pass the spokes through the driving ring. The driving ring is supported for sliding movement parallel to the selected direction of extension of the spokes for which the spokes engage the driven ring to vary the gear ratio of the transmission.
    Type: Grant
    Filed: October 15, 1984
    Date of Patent: April 28, 1987
    Inventor: John W. Fenton
  • Patent number: 4659046
    Abstract: A bracket particularly suited for securing a traffic light fixture to a horizontally extending mast arm which comprises two basic components telescopically interconnected by use of a snap ring and bolts for clamping the outer section to the inner section.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: April 21, 1987
    Inventor: A. Philip Parduhn
  • Patent number: 4648358
    Abstract: An internal combustion engine having two rotating cylinder blocks in each of which is formed a plurality of cylinders to receive portions of pistons that extend partially into each cylinder block. The cylinder blocks are angled relative to one another and the pistons are similarly angled to cause variation in the free volumes of the cylinders as the cylinder blocks rotate. A support shaft passes through the centers of the cylinder blocks to provide support for the cylinder blocks via bearings on the support shaft. Air is introduced into the cylinders via central cavities in the cylinder blocks and fins and slots are formed on, and in, respectively, the interior walls of the cavities to impart rotation to air in the cavities. A series of rings, through which the cylinders pass, are formed on the end of each cylinder block that faces away from the other cylinder block to circulate cooling air drawn into a housing in which the blocks are mounted about the cylinders.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: March 10, 1987
    Assignee: Sullivan Engine Works, Inc.
    Inventors: Robert W. Sullivan, Tommie J. Holder, Max F. Buchanan
  • Patent number: D289024
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: March 31, 1987
    Assignee: Highland Supply Corporation
    Inventor: Daniel L. Vaughn
  • Patent number: D289624
    Type: Grant
    Filed: October 28, 1983
    Date of Patent: May 5, 1987
    Assignee: Mertz, Inc.
    Inventor: Marvin G. Bays
  • Patent number: D289982
    Type: Grant
    Filed: September 21, 1984
    Date of Patent: May 26, 1987
    Assignee: Highland Supply Corporation
    Inventors: Donald E. Weder, Erwin H. Weder, Robert C. Abrams
  • Patent number: D291878
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: September 15, 1987
    Assignee: Cook Manufacturing Corporation
    Inventor: Gregory D. Cook
  • Patent number: D292187
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: October 6, 1987
    Assignee: Highland Supply Corporation
    Inventors: Donald E. Weder, Erwin H. Weder, Robert C. Abrams
  • Patent number: D292188
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: October 6, 1987
    Assignee: Highland Supply Corporation
    Inventors: Donald E. Weder, Erwin H. Weder, Robert C. Abrams
  • Patent number: D292189
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: October 6, 1987
    Assignee: Highland Supply Corporation
    Inventors: Donald E. Weder, Erwin H. Weder, Robert C. Abrams
  • Patent number: D292190
    Type: Grant
    Filed: April 1, 1985
    Date of Patent: October 6, 1987
    Assignee: Highland Supply Corporation
    Inventors: Donald E. Weder, Erwin H. Weder, Robert C. Abrams
  • Patent number: D292191
    Type: Grant
    Filed: April 1, 1985
    Date of Patent: October 6, 1987
    Assignee: Highland Supply Corporation
    Inventors: Donald E. Weder, Erwin H. Weder, Robert C. Abrams