Patents Represented by Law Firm Gifford, Groh, Sprinkle, Patmore and Anderson
  • Patent number: 5307892
    Abstract: An electronically controlled power steering system for motor vehicles is disclosed for steering dirigible wheels in response to an input torque applied to a steering wheel. The power steering system includes a mechanical steering gear mechanism coupled to the steering wheel for generating a mechanically derived steering force in response to the input torque. A power cylinder is coupled to the mechanical steering gear mechanism for producing a hydraulically derived steering force which augments the mechanically derived steering force. A control valve is provided which is in fluid communication with the power cylinder for generating differential pressure applied to the power cylinder. A first signal is generated which is indicative of the input torque applied to the steering wheel. A signal processing unit generates an output signal in response to the first signal.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: May 3, 1994
    Assignee: Techco Corporation
    Inventor: Edward H. Phillips
  • Patent number: 5305604
    Abstract: The present invention is directed to a hydro-mechanical or electro-hydro-mechanical control system utilized for positioning a mechanical device. The control system incorporates an open-center control valve for selectively controlling the differential pressure applied to and the differential flow between input ports of a power output transducer in response to a mechanically applied rotational inputs. The power output transducer is then utilized to position a mechanical device. The control system is a closed loop circuit adapted to supply hydraulic fluid at a desired supply pressure to the control valve. The supply pressure is varied in relation to the absolute value of the pressure differential or load pressure exerted across the input ports of the power output transducer.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: April 26, 1994
    Assignee: Techco Corporation
    Inventor: Edward H. Phillips
  • Patent number: 5305799
    Abstract: A flexible conduit for vehicle engine coolant circuits, which conduit comprises a series of at least a first relatively rigid portion and a second relatively deformable bellows portion capable of being deformed at least into a curved portion; and an inner and outer wall made of different plastic materials.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: April 26, 1994
    Assignee: F.I.S.T. S.p.A.
    Inventor: Attilio Dal Palu
  • Patent number: 5303463
    Abstract: A system is disclosed for assembling and balancing automotive wheels. Each wheel includes a wheel rim having a valve stem opening and a tire adapted to be mounted on the rim. The circumferential position and magnitude of any tire imbalance is marked on the tire. A plurality of valve stems is also provided wherein the valve stems vary in weight from each other. The tire is positioned with respect to the rim so that the valve stem opening is substantially diametrically opposed to the circumferential position of the tire imbalance and a valve stem having a weight substantially the same as the magnitude of the tire imbalance is then positioned in the valve stem opening. The tire is then inflated thus completing the assembly and balancing of the tire.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: April 19, 1994
    Inventor: Douglas J. Pollard
  • Patent number: 5303638
    Abstract: A rodless piston and cylinder assembly having an improved cable connection between the ends of the piston and the working unit in the form of a band of plastic and coated stainless steel strip. The exterior surface of the band is curvilinear and cooperates with the curvilinear slot shape of piston and cylinder plastic sealing grommets. Braking of the working unit is accomplished by pistons in the carriage acting against the carriage slide.
    Type: Grant
    Filed: February 26, 1993
    Date of Patent: April 19, 1994
    Inventor: Joseph H. Green
  • Patent number: 5304118
    Abstract: A method for performing a vitrectomy on an eye is disclosed for removing the vitreous humor from the eye. The method comprises the first step of introducing plasmin into the vitreous humor in order to induce a posterior vitreous detachment. Thereafter, the vitreous is removed by conventional methods and replaced with a sterile saline solution.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: April 19, 1994
    Inventors: Michael T. Trese, George A. Williams, Michael Hartzer
  • Patent number: 5299616
    Abstract: A screen for use with a vehicle window. The screen has a screen portion and a surrounding frame. The frame is secured by securing means along the edge of a vehicle window frame interiorly of the vehicle window. The window is hingedly attached along one edge to a side of the vehicle. An engaging arm mechanism is provided and is pivotal to actuate the window from a closed to an open position. An aperture is provided in the screen to permit passage therethrough by the arm mechanism. A flexible material is attached over the screen aperture and is secured between the pivoting arm and the window. The arm mechanism pivots open the window from within the flexible material so that the opening created by the aperture is covered.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: April 5, 1994
    Inventor: Steve J. Sholtz
  • Patent number: 5295719
    Abstract: A connection assembly for vehicle engine coolant circuits, wherein a tubular multiway distributing element presents respective tubular appendixes fitted with the end portion of a branch pipe. The pipe and tubular appendix are made integral by means of a tubular coupling molded in one piece on the end portion of the pipe, on a relatively small portion connecting with the appendix.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: March 22, 1994
    Assignee: Fabbrica Italiana Serrature Torino S.p.A.
    Inventor: Attilio Dal Palu'
  • Patent number: 5295414
    Abstract: A vibration and sound proofing system for a working vehicle such as a tractor or a lawn mower having a hydrostatic stepless transmission (HST) included in a propelling transmission system for transmitting engine output to wheels. The HST is mounted in a case secured to intermediate mounting plates attached to a gear transmission case through vibration and sound absorbers. Output shafts of the HST are connected to input shafts of a gear transmission through vibration absorbing shaft couplings.Each of the vibration absorbers includes a metallic outer tube, a metallic inner tube disposed concentrically with the outer tube, and a rubber element filled tight in an annular space defined between the outer and inner tubes.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: March 22, 1994
    Assignee: Kubota Corporation
    Inventors: Tadashi Nakamura, Kenzo Ushiro, Hirofumi Iritani, Eiishi Ishida
  • Patent number: 5293956
    Abstract: A four wheel drive working vehicle having a front wheel transmission switchable between a standard position for driving front wheels at substantially the same speed as rear wheels, and an accelerating position for driving the front wheels at a higher speed than the rear wheels; right and left side brakes for acting on the right and left rear wheels, respectively; a control device for switching the front wheel transmission from the standard position to the accelerating position when the front wheels are steered in excess of a first predetermined angle rightward or leftward from a straight running position, and for operating one of the right and left side brakes inwardly with respect to turning of the vehicle when the front wheels are steered in excess of a second predetermined angle rightward or leftward from the straight running position; and a governor for governing operation of the control device in response to a running speed of the vehicle.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: March 15, 1994
    Assignee: Kubota Corporation
    Inventor: Naoki Onishi
  • Patent number: 5293012
    Abstract: A disconnecting switch with improved contacts in the form of a spool contact having one or more circumferential V-grooves and a finger contact having fingers which are provided internally with spring members for maintaining contact pressure. Spaced plastic inserts provide a maintenance free bearing for rotation of switch members.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: March 8, 1994
    Assignee: E Manufacturing Company, Inc.
    Inventor: Jozef Levi
  • Patent number: 5291670
    Abstract: A process for baking electrically conductive wires clad in insulating plastics resin, comprising a first, evaporation stage for evaporation of solvents and a second resin polymerization and cross-linking stage, which are performed respectively in a first and in a second region of a tunnel chamber in a continuous oven between the inlet regions and outlet regions of which the wires advance, a third stage comprising aspiration from the oven of a mixture of air and solvents formed during the first evaporation stage, and a fourth stage comprising heating this mixture to a predetermined temperature such as to cause combustion of the solvents, and including a fifth stage of introducing heat energy to these regions of the oven from at least part of the stream of air and combustion products coming from the fourth stage, through heat exchangers disposed on the outer surface of this tunnel chamber, in such a way as significantly to reduce the introduction of heat energy provided to the chamber by heating means supplied
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: March 8, 1994
    Assignee: S.I.C.M.E. S.p.A. Societa Industriale Costruzioni Microelettriche
    Inventors: Renato Surra, Bruno Bronzini, Michele Ricco
  • Patent number: 5291730
    Abstract: A knuckle connector is used to connect spacedly end knuckles of a chain strand to form a chain loop. The knuckle connector includes a pair of link units, each of which has a link pin and an oval-shaped link plate formed with a circular through-hole on one end and a retaining hole on an opposite end. The link pin has a head secured in the through hole and a tail end formed with a peripheral channel. The link pin of one of the link units extends through a pin hole formed in a corresponding one of the end knuckles such that the peripheral channel initially extends into a large insert part of the retaining hole in the link plate of a remaining one of the link units. The peripheral channel of the link pin of one of the link units engages the link plate of the remaining one of the link units in a diameter-reduced retaining part of the retaining hole when the end knuckles are pulled apart.
    Type: Grant
    Filed: April 8, 1993
    Date of Patent: March 8, 1994
    Assignee: KMC Chain Industrial Co., Ltd.
    Inventor: Nick Wu
  • Patent number: 5290987
    Abstract: An apparatus for electrical discharge machining (EDM) is disclosed having a housing and a workpiece support assembly secured to the housing for holding a workpiece in a predetermined location. An EDM electrode is attached to the housing for performing the EDM machining. A tank assembly is also attached to the housing and movable between a machining position and a retracted position. In the machining position, the tank assembly encompasses a workpiece secured to the workpiece support area and filled with a dielectric fluid necessary for the EDM machining process. In its retracted position, the tank assembly is spaced away from the workpiece to facilitate access to the workpiece for removal of the finished workpiece and reattachment of a new workpiece in preparation for the next EDM machining operation.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: March 1, 1994
    Assignee: Charmilles Technologies Manufacturing Corporation
    Inventors: Paul J. Davis, Myron C. Johnson
  • Patent number: 5289680
    Abstract: A hydraulic circuit for a working vehicle comprising a first pump, a second pump, a first actuator, a second actuator, and a selector valve having a plurality of control positions. The selector valve is switchable between a first position for connecting the first pump to the first actuator and the second pump to the second actuator, and a second position for connecting the first pump and the second pump to the second actuator. This circuit includes a first relief valve disposed between the selector valve and the first pump, and a second relief valve disposed between the selector valve and the second pump. The first relief valve is set to a higher relief pressure than the second relief valve.
    Type: Grant
    Filed: March 8, 1991
    Date of Patent: March 1, 1994
    Assignee: Kubota Corporation
    Inventors: Mitsuhiko Obe, Hironobu Kubota
  • Patent number: 5290198
    Abstract: A doll having a sensor for determining the insertion of a top portion of a nursing bottle. The sensor includes a movable portion pivoting in response to insertion of the top portion of the nursing bottle. A contact point secures to one end of the movable portion and engages a contact member in order to cause a sound to be emitted by the doll. The sound is emitted from a speaker placed within the doll. A pair of pressure activated switches are also provided in the doll and operate in conjunction with the sensor to generate varied vocal responses.
    Type: Grant
    Filed: August 17, 1990
    Date of Patent: March 1, 1994
    Assignee: Yugen Kaisha Nakashou Giken
    Inventor: Toshiaki Nakayama
  • Patent number: 5288965
    Abstract: An electro-erosion machine including rollers for pulling the used wire electrode from the machining area and imparting a curl to it depositing it in a collection receptacle.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: February 22, 1994
    Inventors: Remi Gambin, Daniel Matter
  • Patent number: 5286579
    Abstract: A fuel cell includes a plurality of cells. Each cell has a three-layer plate member having an electrolyte layer, an oxygen electrode attached to one face of the electrolyte layer and a fuel electrode attached to the other face of the electrolyte layer. The cell also has a separator affixed only to the oxygen electrode and an oxygen-containing gas flow passage formed between the oxygen electrode and the separator. A plurality of fuel flow passages are formed between an adjacent pair of the cells as assembled. First and second partition wall members are respectively disposed tightly adjacent a pair of opposed end faces of the cell to which faces the oxygen-containing gas flow passage is closed by the separator. Third and fourth partition wall members are respectively disposed along a pair of opposed cell edge portions where the oxygen-containing gas flow passage is open between the pair of cells. The first and second partition wall members have end portions thereof projecting relative to the cell.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: February 15, 1994
    Assignee: Osaka Gas Co., Ltd.
    Inventor: Kosuke Akagi
  • Patent number: D344784
    Type: Grant
    Filed: June 8, 1992
    Date of Patent: March 1, 1994
    Assignee: Petro Ware, Inc.
    Inventor: James Swingle
  • Patent number: D345366
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: March 22, 1994
    Assignee: Clayton Machine Corporation
    Inventor: Timothy W. Hewitt