Patents Assigned to Stewart-Warner Corporation
  • Patent number: 4947150
    Abstract: A pressure sender is provided with a variable electrical resistance corresponding to a sensed pressure, to be placed in series with a voltage source and a pressure gauge. The pressure sender is diaphragm-actuated, which diaphragm controls the positioning of an electrical contact against a ceramic thick film rheostat. An electrically conductive metal clip secures the rheostat in position as well as completes the electrical connection between the rheostat and the electrical circuit of which the pressure sender is a part. The electrical contact is rockingly mounted so that deflection of the diaphragm displaces the electrical contact through an arcuate travel path along various resistance positions of the thick film ceramic rheostat. Current from the electrical circuit will flow through the metal clip to input contacts of the rheostat, and then to the resistance positions.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: August 7, 1990
    Assignee: Stewart Warner Corporation
    Inventor: Henry Wasserstrom
  • Patent number: 4941136
    Abstract: A completely electronic programmable hour meter is disclosed. The hour meter accumulates and displays run time of the device being measured. The hour meter can also count pulses. The meter can be preprogrammed with a maintenance timer limit which is compared to the accumulated run time. If the accumulated run time equals or exceeds the preprogrammed time limit an alarm display flashes. The hour meter will store the accumulated run time for up to 5 years if power is interrupted. This memory retention occurs without use of a battery. The elapsed time is stored in a plurality of registers such that no register is written to more than a preselected number of times, nominally ten thousand, until all the registers have been updated the preselected number of times.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: July 10, 1990
    Assignee: Stewart Warner Corporation
    Inventor: Edward J. Breitung, II
  • Patent number: 4908806
    Abstract: A directional starting spring which ensures that an AC synchronous motor is rotating in the proper direction is disclosed. The AC synchronous motor includes a circular magnet rotating in "synch" with the frequency of the alternating current. The magnet rotates a worm gear attached to the center on its axial face. This worm gear drives a second worm gear positioned perpendicular to the first worm gear. The second worm gear drives a series of gears which display the elapsed time. Attached to this second worm gear is the directional starting spring. If the motor is rotating in the proper direction the spring contacts the housing of the meter and slides on the second worm gear. If the motor is rotating in the wrong direction the spring contacts the axial face of the magnet stopping the rotating magnet and pushing it in the proper direction.
    Type: Grant
    Filed: December 1, 1988
    Date of Patent: March 13, 1990
    Assignee: Stewart Warner Corporation
    Inventor: Robert D. Nickolaus
  • Patent number: 4870891
    Abstract: A double acting piston and cylinder air motor with pneumatically actuated pilot valves for shifting a directional control valve, where the pilot valves are controlled by pilot ports in the cylinder as they are uncovered by the piston.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: October 3, 1989
    Assignee: Stewart Warner Corporation
    Inventors: Jerry D. Shew, Stuart A. Evans
  • Patent number: 4807090
    Abstract: An instrument with an illumination ring that edge-lights an opaque dial face with increased light flow by augmenting the conductivity of both the light receiving portion of the ring and a bevel for deflecting light laterally across the face. The increased light flow is accomplished by an extended annular wall portion spaced from the edge of the dial face.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: February 21, 1989
    Assignee: Stewart Warner Corporation
    Inventors: Panagiotis K. Mandellos, Renzo N. Rutili
  • Patent number: 4793022
    Abstract: A one-piece plastic wheel protector for dual wheel casters that snaps over and locks on the wheels and is easily removed by a breakaway pull tab.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: December 27, 1988
    Assignee: Stewart-Warner Corporation
    Inventor: Lidio P. Raffaeli
  • Patent number: 4768300
    Abstract: An illuminated information display including a standard planar active display, such as an LCD display, covered by a rigid transparent plate with fixed graphics on its rear surface illuminated by light transmitted laterally through the plate.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: September 6, 1988
    Assignee: Stewart Warner Corporation
    Inventor: Renzo N. Rutili
  • Patent number: 4758784
    Abstract: An air core gauge having orthogonally related coils that react with a rotor magnet to angularly position an indicating pointer, suitable for use as either a pressure,temperature, or fuel gauge. All-attitude pointer zero return is achieved with a stationary magnet, and voltage regulation is eliminated with a zener diode in series with one of the coils.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: July 19, 1988
    Assignee: Stewart Warner Corporation
    Inventors: John D. Baker, Ray J. Gallagher
  • Patent number: 4756230
    Abstract: A reciprocating piston and cylinder pneumatic motor with a sound-reducing system that diffuses exhausting air by directing it across the curved outer surface of the cylinder.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: July 12, 1988
    Assignee: Stewart Warner Corporation
    Inventor: Jerry D. Shew
  • Patent number: 4732034
    Abstract: A vehicle tachometer kit including a pick up coil that is adapted to be mounted on the outside of the vehicle's alternator to sense its rotating field without any disassembly. An induced signal in the coil from alternator field leakage provides the normal input to a user calibrated r.p.m. display driving circuit in the tachometer that can be calibrated for different alternators and drive pulley ratios without another tachometer by selectively applying a simulated input reference signal to the display driving circuit and adjusting the r.p.m. display until a scheduled ratio is achieved between the displayed r.p.m. and the reference signal.
    Type: Grant
    Filed: February 29, 1984
    Date of Patent: March 22, 1988
    Assignee: Stewart-Warner Corporation
    Inventor: Thomas E. Bjorn
  • Patent number: 4732221
    Abstract: A pneumatic power tool that includes fluid conveying passageways formed by casting grooves in the tool exterior and then molding an elastomeric material over the grooves to enclose the passageways.
    Type: Grant
    Filed: January 21, 1987
    Date of Patent: March 22, 1988
    Assignee: Stewart-Warner Corporation
    Inventor: Edmund C. Dudek
  • Patent number: 4732361
    Abstract: A self-cleaning restrictor assembly for a high pressure lubricant valve that minimizes the effect of accidental discharge by reducing no load outlet flow. The restrictor assembly has a pair of restrictors that are alternately opened and closed to provide a constant restricted flow area while easily passing any foreign material.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: March 22, 1988
    Assignee: Stewart-Warner Corporation
    Inventors: Myron J. Johnson, Mark C. C. Kao
  • Patent number: 4728039
    Abstract: A paint spray gun having a plastic nozzle body with a separate plastic nozzle tip universally mounted on the nozzle body to align the tip in a central orifice in a plastic air cap.
    Type: Grant
    Filed: December 8, 1986
    Date of Patent: March 1, 1988
    Assignee: Stewart Warner Corporation
    Inventors: Myron J. Johnson, Robert L. Maggio
  • Patent number: 4707880
    Abstract: A heavy-duty caster assembly with a pintle and swivel plate mounted on top of a wheel carrying horn that minimizes pintle bending and breaking with the addition of a powdered metal washer around the pintle locked on top of the swivel plate.
    Type: Grant
    Filed: March 4, 1986
    Date of Patent: November 24, 1987
    Assignee: Stewart-Warner Corporation
    Inventors: Michael P. Doyle, Francis J. Forte, Edward Galkowski
  • Patent number: 4700170
    Abstract: A wound wire rheostat for a fuel level sender or other condition sensor and its method of manufacture, that eliminate wire snapping by heat staking selected portions of the wire into its plastic support board.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: October 13, 1987
    Assignee: Stewart-Warner Corporation
    Inventor: Frank C. Weaver
  • Patent number: 4664298
    Abstract: A hand lever operated grease gun that has both high pressure and high volume modes by changing the mechanical advantage of the lever acting on a dispensing piston. A spring biased pivotal connection between the lever and a forwardly mounted supporting link is shiftable between two positions by depression of the lever against the biasing force of the spring.
    Type: Grant
    Filed: May 1, 1985
    Date of Patent: May 12, 1987
    Assignee: Stewart-Warner Corporation
    Inventor: Jerry D. Shew
  • Patent number: 4658127
    Abstract: An electrically controlled pattern tracer selectively uses stored detected pattern information from a sensor differently depending upon the value of a selected entered kerf entered to control the tracing element to follow a pattern turn. The tracer also distinguishes one type of pattern turn from another and delays use of stored pattern information for control of the tracing element by different amounts depending upon the type of turn detected and the entered kerf.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: April 14, 1987
    Assignee: Stewart-Warner Corporation
    Inventor: Francis E. Ferrari
  • Patent number: 4647760
    Abstract: A pattern tracer with circuitry for electronically adjusting the lateral offset of the tracing element for kerf compensation, that produces a control signal based on a temporal relationship between a reference signal and a pattern detection signal associated with a preselected kerf compensation. The pattern is traced with the selected lateral offset in accordance with a control signal. The control signal is developed in response to both a line width compensation signal and a kerf compensation signal. A photometric detector is calibrated by electronically adding a compensation angle to a pattern detection angle to compensate for any physical misalignment of the detector.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: March 3, 1987
    Assignee: Stewart-Warner Corporation
    Inventor: Francis G. Bardwell
  • Patent number: D295599
    Type: Grant
    Filed: May 1, 1985
    Date of Patent: May 10, 1988
    Assignee: Stewart Warner Corporation
    Inventor: Jerry D. Shew
  • Patent number: D296300
    Type: Grant
    Filed: December 19, 1984
    Date of Patent: June 21, 1988
    Assignee: Stewart - Warner Corporation
    Inventors: Michael P. Doyle, Frank J. Fontana, Daniel J. Provolo