Patents Represented by Law Firm Duckworth, Allen, Dyer & Pettis
  • Patent number: 4687994
    Abstract: A system is provided for dynamically detecting and providing an electronic output representative of changes in the position of a fuel injection element in an internal combustion engine. The system includes an electronic circuit having a sensor for sensing a change in a magnetic field external to the circuit, and providing an output representative of the change. Circuit elements are electronically coupled with the output of the sensor for providing an output indicating the presence of the magnetic field change. A nulling circuit is provided for nulling the electronic circuit responsive to the sensor output, to thereby compensate for ambient magnetic fields, temperature and process variations. Exceptionally low current circuit characteristics are achieved in an integrated circuit configuration and geometry having very low junction leakage characteristics.
    Type: Grant
    Filed: July 23, 1984
    Date of Patent: August 18, 1987
    Assignee: George D. Wolff
    Inventors: David E. Fulkerson, Marvin L. Geske
  • Patent number: 4631020
    Abstract: A blow pin for molding machines includes first and second separate members juxtaposed adjacent to each other, with a replaceable cutting member positioned between the first and second members and with a shoulder-fastener arrangement associated with the blow tube for holding the first and second members together with the cutting member therebetween.
    Type: Grant
    Filed: November 14, 1985
    Date of Patent: December 23, 1986
    Assignee: Sewell Plastics, Inc.
    Inventors: Robert E. Frankenberg, Mark A. Calderazzo
  • Patent number: 4622979
    Abstract: Apparatus is disclosed that can be worn by a user for monitoring and recording electrocardiographic data from the user. The apparatus provides for continuous storage of predetermined time increments of such data in digital form, with new data being stored over preexisting data and the apparatus being operable by the user halt further such recordings to hold for subsequent output the data corresponding to such a predetermined time increments.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: November 18, 1986
    Assignee: Cardiac Monitoring, Inc.
    Inventors: Louis J. Katchis, Michael P. Bumgarner
  • Patent number: 4608863
    Abstract: This Takeoff and Abort Instrument system, mounted on the pilot's instrument panel, will indicate to the pilot, as soon as the throttles are advance to the takeoff position and brakes are released if all engines are producing the designed takeoff thrust. During the takeoff run an ABORT indication will be visible to the pilot anytime the net aircraft linear acceleration degrades below that amount required to make a safe takeoff. This instrument assembly is comprised of two major components: A. A flexible transparent tube formed into a right triangle with the shortest leg being mounted vertically on the instrument face; this leg becomes a sight gauge up which a colored non-freezing liquid rises directly in proportion to the aircraft's linear acceleration. The longest leg connects the base of the sight gauge to a reservoir located forward of and level with the base of the sight gauge.
    Type: Grant
    Filed: October 24, 1983
    Date of Patent: September 2, 1986
    Inventor: Marcus F. Cooper
  • Patent number: 4597270
    Abstract: An automatic ice-making system for use with a bottled water supply includes a refrigeration unit having a freezer section for receiving and freezing water. An enclosed reservoir for bottled water is provided with the refrigeration unit, a feed line being established between the reservoir and the freezer section. A valve is interposed in the feed line for controlling the flow of water through the feed line between the reservoir and the freezer. A pump is provided with the reservoir for pumping water through the feed line. A specific electrical contact configuration provides means for simultaneously energizing the pump and commencing the opening of the valve, responsive to a sensed condition in the freezer. The preferred configuration of the reservoir is a flat, generally U-shaped container, with the pump being positioned within an enclosure located within the confines of the U-shaped container.
    Type: Grant
    Filed: October 25, 1984
    Date of Patent: July 1, 1986
    Assignee: Maximma Consumer Technologies, Inc.
    Inventor: William T. Kerr
  • Patent number: 4596342
    Abstract: Disclosed are easy open containers using pull tabs having rivet holes with not less than eight, nor more than ten sides. A point between any two flats of the rivet hole is aligned with the pull tab nose. The disclosed rivet holes provide good locking characteristics.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: June 24, 1986
    Assignee: Automated Container Corporation
    Inventor: Edgar H. Zysset
  • Patent number: 4595395
    Abstract: A unique lubricating, corrosion inhibiting and rust inhibiting additive for alcohol fuels having from 1 to 5 carbon atoms is disclosed. The lubricating additive comprises a mixture consisting essentially of a lubricant, an emulsifying agent, ethylene-vinyl acetate copolymer and organic solvents formulated to obtain a mixture having a specific gravity substantially equivalent to that of the alcohol in which the lubricating additive will be mixed. The invention further comprises an alcohol fuel-lubricating additive mixture for use as a fuel in internal combustion engines as well as methods for preparing such mixtures.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: June 17, 1986
    Inventor: Earl J. Smith
  • Patent number: 4596029
    Abstract: An X-ray generator system is provided with a high-voltage feedback loop for controlling the output of an inverter to thereby maintain a desired output voltage level. The voltage-feedback loop is provided with a phase-advance network to selectively vary the gain of the system in such a way as to provide for high gain during the initial stage so as to obtain a short rise time, while subsequently reducing the gain so as to clamp the kV overshoot at the end of the rise time. A phase-lag network is also included to effectively eliminate noise that is introduced by the phase-advance network.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: June 17, 1986
    Assignee: General Electric Company
    Inventors: Carlos Manueco Santurtun, Angel Diaz Carmena
  • Patent number: 4592161
    Abstract: A soft plastic fishing lure is comprised of a generally tubular body of pliable plastic defining forward and rearward ends. A soft plastic tail extends from the rearward end as a substantially flat ribbon, the tail formed of a curved, generally "S" configuration defined by first and second pairs of concentric arcs, with the first arc pair spaced from the body and the second arc pair spaced from the first pair. The shorter arc in each pair extends straight during movement through water, and the longer arc in each pair curls against the flow of water to create turbulence, with the second arc pair causing drag to reduce spin.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: June 3, 1986
    Inventors: H. Wayne Smith, Mark W. Smith, James O. Ising
  • Patent number: 4589051
    Abstract: In an X-ray generator operating with a pulse-width-modulated transistor inverter, circuitry is provided to sense the collector-emitter voltage of each of the transistors and to responsively turn off the transistor when that voltage level reaches a predetermined threshold level which is indicative of a problem. Provision is included to inhibit the operation of the protective circuit during the time period in which the transistor is turning on so as to thereby allow for higher voltages during that critical period.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: May 13, 1986
    Assignee: General Electric Company
    Inventors: Carlos M. Santurtun, Felix L. Ceca, Jose M. Q. Benegoechea
  • Patent number: 4581958
    Abstract: An extensible handle assembly for a ratchet wrench or similar tool includes a tubular handle member with a central hole down its length and a tool-engaging shank extending through the central hole of the handle member. The shank is slidable in the handle member between extended and retracted positions, and includes a detent to engage the shank at each of those positions. A plug that extends through the central hole from the rearward end of the handle member permits disassembly of the shank from the handle member, restricts movement of the shank outwardly from the forward end of the handle member and restricts axial rotation of the shank.
    Type: Grant
    Filed: June 11, 1985
    Date of Patent: April 15, 1986
    Inventor: Foye M. Shull
  • Patent number: 4578054
    Abstract: Apparatus for opening flattened cartons having a pair of minor flaps and a pair of major flaps. A constant speed conveyor carries a horizontally disposed flattened carton across an actuator having a cam surface. The cam surface moves upward to fold one pair of major and minor flaps upward and then downward to fold the other pair of major and minor flaps downward. A clamp grasps the upward folded major flap and draws it upward as the conveyor moves the carton forward causing the carton to open. The clamp releases the major flap and the carton moves past a glue gun which applies glue to the minor flaps. A pair of curl bars folds the major flaps against the glue coated minor flaps. An extending platen presses the flaps against a roller bank permitting the glue to set. The platen retracts and the opened and bottom-sealed carton is completed.
    Type: Grant
    Filed: November 17, 1983
    Date of Patent: March 25, 1986
    Inventor: Robert M. Herrin
  • Patent number: 4578682
    Abstract: An antenna dish structure is disclosed having a central support to which are attached a plurality of elongated ribs extending radially outwardly with a plurality of metallic mesh members extending between adjacent pairs of rib, and a rim structure connected to the outer ends of the ribs, with both the ribs and the rim having portions for receiving therewithin such mesh members.
    Type: Grant
    Filed: March 20, 1984
    Date of Patent: March 25, 1986
    Assignee: Raydx Satellite Systems, Ltd.
    Inventors: Robert L. Hooper, Lawrence W. Yonge, III
  • Patent number: 4576502
    Abstract: A corner construction having high strength and resistance to torsional forces for use with hollow elongate tubing members. A first longitudinal member extruded from aluminum includes a pair of parallel planar walls connected by a planar web along one edge and a stepped web along the other edge. A second similar member is provided having a spacing of its walls for slidably receiving the first member therebetween. The stepped web of the second member at a terminal end thereof is cut away to form steps complementary to the stepped web of the first member. A terminal end of the first member is inserted between the walls of the second member to abut its planar web and to cause the stepped web to abut the cut-away steps of the second member. Fastening means is provided for maintaining the first member in its abutting relation with the second member.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: March 18, 1986
    Inventor: Joseph C. Bancroft
  • Patent number: 4574901
    Abstract: An improved seat for a wheelchair having a forward section for supporting the occupant's thigh areas and a rearward section hingedly attached to the forward section for supporting the occupant's buttocks area. The rearward section is attached to a linear actuator which moves the rearward section downward such that the occupant is aupported by the forward section of the seat and the back rest of the wheelchair, thus permitting air circulation around the buttocks area and blood circulation in the buttocks region to prevent breakdown of skin and flesh in the buttocks area. An automatic control is provided to periodically lower and raise the rearward seat section without attention of the occupant.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: March 11, 1986
    Inventor: Albert W. Joyner
  • Patent number: 4574656
    Abstract: In a vehicle using a differential apparatus for enabling the operator to quickly stop a skid. A set of electric clutches is attached to the idler pinion gears of the differential and to the spider. A centrifugal switch attached to a pinion responds to rapid rotation of the pinion which occurs during skidding to engage the electric clutches which thereby stop the spinning of the vehicle wheels permitting the drive to regain control. A time delay device maintains the clutches engaged for a short time after the centrifugal switch reopens.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: March 11, 1986
    Inventors: Milton E. H. McCarthy, deceased, by Helen McCarthy, representative
  • Patent number: 4572330
    Abstract: A boat ladder for boarding an inflatable pontoon boat, dinghy or similar small craft of the type having opposed generally parallel gunwales. The ladder has two generally parallel ladder supports, each with a first end bendable across one of the gunwales. Plural and parallel ladder steps extend between the two ladder supports and a strap is coupled at one end to the first end of both of the ladder supports. The strap is dimensioned to extend across the space between the gunwales. A hook extends about the second gunwale for coupling the other end of the strap to the other gunwale, whereby the weight of a person climbing up the ladder is distributed relatively evenly across both the gunwales.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: February 25, 1986
    Inventor: Donald R. Langevin
  • Patent number: 4557107
    Abstract: A ducted fan type model aircraft power plant having a mounting for a one cylinder internal combustion model aircraft engine. The preferred engine utilizes a special vertically oriented carburetor. A duct is supported by a set of stators having an aerodynamic shape for straightening airflow through the duct. A fan having seven identical individual replaceable blades is disposed at the front of the duct and directly driven by the engine. One stator is adapted to essentially enclose the vertical carburetor and to smoothly direct the airflow from the fan around the carburetor to the engine cylinder for cooling. The stator has an opening to the carburetor air inlet for providing air under pressure thereto. The stator shapes cooperate with the duct and aft fairings of the power plant to deliver a smooth airstream having a uniform non-turbulent flow to produce a maximum propulsive efficiency.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: December 10, 1985
    Inventors: Robert S. Violett, W. Lee Andersen
  • Patent number: D281739
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: December 17, 1985
    Inventor: Willie J. Hazley
  • Patent number: D283167
    Type: Grant
    Filed: April 13, 1983
    Date of Patent: March 25, 1986
    Inventor: George Perry