Patents Represented by Attorney Linval B. Castle

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  • Precision dispensing pump for viscous materials
    Patent number: 5564606
    Abstract: A viscous fluid dispensing pump such as used on the mechanical arms of computer controlled dispensing systems introduces the fluid into the center of a vertical bore having a dispensing tube at the bottom and a variable pitch thread feed screw in the bore rotated by a precision servo motor. An alternate embodiment describes a conical shaped feed screw with linear pitch turning in a conical shaped sleeve in the bore. In both embodiments, the viscous material is homogenized with gas and low viscosity particles and the servo motor accurately controls the amount of deposition.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: October 15, 1996
    Inventor: Harold J. Engel
  • Flexible shaft
    Patent number: 5554073
    Abstract: A flexible shaft in which the interior rotating cable is formed of links having first and second loops formed of wires or bands that have a maximum diameter slightly less than the inside diameter of the outer non-rotating shell. The second loop of one link is linked to the first loop of the adjacent link to provide a very flexible shaft or cable with a minimum of friction.
    Type: Grant
    Filed: January 6, 1995
    Date of Patent: September 10, 1996
    Inventor: Rathnakar Yadama
  • Metal particle sweeper
    Patent number: 5549207
    Abstract: A hand held tool for gathering and later releasing metallic particles such as paper clips or a spilled box of pins or tacks includes a handle with a magnetic attached at the bottom and a sweeper cover covering the magnet and hinged to the handle. Ferrous particles are gathered on the surface of the sweeper cover and later released by pivoting the magnet away from the cover.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: August 27, 1996
    Inventors: Kathleen Busico, Cynthia C. McCreery
  • Truck tire underinflation detection and control system
    Patent number: 5537090
    Abstract: A truck tire/wheel assembly detection system in which the moving thermal dynamics of a truck are measured before cooling off, by passing over and around contact or non-contact thermometers directed toward the tire/wheel assembly and transmits the approximate temperature of each tire/wheel assembly to a computer which will compares the output data and identifies each abnormally overheated tire/wheel assembly and print out location on rig and other information that may be required. A modem controlled by the computer is used to advise other interested parties of rig condition at this check out point.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: July 16, 1996
    Inventors: Stephen E. Thomas, Mark S. Thomas
  • High adhesion magnetic rail
    Patent number: 5526755
    Abstract: A magnetized rail for improving the adhesion between the rail and the steel wheels of a rail car will help prevent skidding of the rail car when decelerating from a high speed. The rail is split with an air gap in the rail head and a electromagnet coupled between the split webs of the rail.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: June 18, 1996
    Inventor: James G. Dalrymple
  • Surgical knife with blade shield
    Patent number: 5522828
    Abstract: A scalpel with a blade set at about thirty degrees to the handle has a blade shield that pivots up from the handle and a shield lock that prevents accidental lifting of the shield. The shield lock includes a small movable shaft just below the sidewalls of the shield next to the handle. A small disc is at each end of the shaft close to the handle and prevents the shield from being pivoted up. A counterbore around the shaft on one side of the handle enables the adjacent disc to be pushed in, thus extending the opposite disc permitting the shield to be pivoted up to unshield the blade.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: June 4, 1996
    Inventor: Cicero H. Malilay
  • Magnetic feedthrough manipulator
    Patent number: 5514925
    Abstract: A magnetic feedthrough manipulator adapted to be sealed to a chamber for inserting a manipulator shaft capable of rotational and longitudinal movement. The shaft is axially coupled to a ferromagnetic armature having an even number of longitudinal surface splines freely movable within a nonmagnetic tubular housing and which is controlled by alternately polarized magnets in a frame that slides and rotates on the outer surface of the housing. Two or more manipulator shafts may be controlled independently by a like number of armatures in the same housing.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: May 7, 1996
    Assignee: Thermionics Northwest, Inc.
    Inventors: James N. Worthington, Richard D. Killam
  • Service conduit drain
    Patent number: 5505027
    Abstract: In hilly areas, building below the level of flooded manholes or secondary distribution boxes are often damaged by water entering the electric meter enclosure through the service conduit. For eliminating drain water from a service conduit before it reaches a meter enclosure, a drain pipe is installed in the conduit below the meter enclosure. The drain pipe must not be accessible to any probing and therefore has several spaced, oppositely and alternately positioned vanes in the bore with each vane covering over half the area of the bore.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: April 9, 1996
    Inventor: James E. Young
  • One-way valve panel
    Patent number: 5503186
    Abstract: A one-way fluid valve formed of a parallel plurality of one-way valve cells, each cell comprising three flexible leaflets each bonded to 1/3 of the edge of a hexagonal opening in a frame, their free center edges joining to close upon pressure from one side and separating to open the valve upon pressure from the opposite side of the frame.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: April 2, 1996
    Inventor: Wilmo C. Orejola
  • Scatter correction in reflectivity measurements
    Patent number: 5452091
    Abstract: The correction for scattered light reflected from a substrate having surface irregularities and the measurement of thin film thickness on that substrate are made using a spectrophotometer system and the Fresnel reflectance equation.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: September 19, 1995
    Assignee: Nanometrics Incorporated
    Inventor: Rodney P. Johnson
  • Question and answer board game with defining, spelling and synonyms
    Patent number: 5405150
    Abstract: An educational game comprising a game board having a closed loop of four legs, each containing eight spaces numbered from 1-4, tokens for each player, a pair of dice, and a plurality of cards, each of which have a word and four numbered statements instructing the player what to do with that word. A player rolls the dice, moves his token into a numbered space and the player to his left reads the card and the instruction having the number corresponding to the number of his space. If the player answers correctly, he takes another turn. The winner is the first player who gets his tokens completely around the loop.
    Type: Grant
    Filed: July 5, 1994
    Date of Patent: April 11, 1995
    Inventor: Maria A. Loder
  • Golf cart handle
    Patent number: D357785
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: April 25, 1995
    Inventor: Li-Kuo J. Wang
  • Foot wedge for squatting exercises
    Patent number: D359323
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: June 13, 1995
    Inventor: Daniel E. Ross
  • Nail polish bottle storage case
    Patent number: D359619
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: June 27, 1995
    Inventor: Michelle J. Magnussen
  • Dart point
    Patent number: D361797
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: August 29, 1995
    Inventor: Mark J. Kulik
  • Novelty cap
    Patent number: D362743
    Type: Grant
    Filed: May 31, 1994
    Date of Patent: October 3, 1995
    Inventor: James W. Martin
  • Wheeled dolly for golf bags
    Patent number: D364020
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: November 7, 1995
    Inventor: Jessie L.-K. Wang
  • Folding storage table and cabinet
    Patent number: D368603
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: April 9, 1996
    Inventor: Ronald Ray
  • Brush for golf cart wheel
    Patent number: D370348
    Type: Grant
    Filed: November 27, 1992
    Date of Patent: June 4, 1996
    Inventor: Paul McElheney
  • Urine relief tube
    Patent number: D370975
    Type: Grant
    Filed: February 27, 1995
    Date of Patent: June 18, 1996
    Inventor: Harold R. Mohr