Patents by Inventor P. Lawrence

P. Lawrence has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5655642
    Abstract: There is provided an idler roll for use in belt conveyor systems comprising a shaft and at least two modular sections disposed adjacent to one another surrounding the shaft, the at least two modular sections varying in thickness as measured along an axis of the shaft. There is also provided an idler roll for use in belt conveyor systems comprising a shaft and a molded polymer coating disposed around the shaft, wherein the coating is at least partially tapered in cross section at each end of the idler roll. There is further provided a belt conveyor system for handling bulk material employing idler rolls.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: August 12, 1997
    Assignee: FMC Corporation
    Inventors: Scott P. Lawrence, Charles F. East, Samuel Clark Richey
  • Patent number: 5624668
    Abstract: Ferric oxyhydroxide-dextran compositions for treating iron deficiency having ellipsoidal particles with a preferred molecular weight range of about 250,000 to 300,000 daltons.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: April 29, 1997
    Assignee: Luitpold Pharmaceuticals, Inc.
    Inventors: Richard P. Lawrence, Ralf A. Lange, Chin Wu, Mary J. Helenek
  • Patent number: 5519866
    Abstract: A human oriented object programming system provides an interactive and dynamic process for the incremental building of computer programs which facilitates the development of complex computer programs such as operating systems and large applications with graphic user interfaces (GUIs). The program is modeled as a collection of units called components. A component represents a single compilable language element such as a class or a function. The major functionalities are the database, the compiler, build and link mechanism. The database stores the components and properties. The compiler, along with compiling the source code of a property, and generating object code is responsible for calculating the dependencies associated with a component. The build mechanism uses properties of components along with the compiler generated dependencies to correctly and efficiently sequence the compilation of components during a build process.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: May 21, 1996
    Assignee: Taligent, Inc.
    Inventors: Roger P. Lawrence, John R. Dance
  • Patent number: 5477800
    Abstract: A device to secure a boat to a dock with a rope in a conventional manner, using two horizontally protruding horns (14) extending in opposite directions and two smooth curved surfaces (12) below each of the horns to guide the rope. Another protruding horn with a smooth guiding surface below it faces each of the other two horns and guiding surfaces, which allows a person to guide the rope from either direction without removing the rope from the device and moving it to the other end as is required with a conventional cleat. Two sloping surfaces (13) on the ends of the device are parallel to the direction a person would normally be walking on a dock and are designed to deflect a moving foot away from the protruding horns of the device, reducing the liklihood of injury caused by striking the device.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: December 26, 1995
    Inventor: Alan P. Lawrence
  • Patent number: 5477801
    Abstract: A device used in conjuction with a standard dock cleat (20) which provides protection from the horizontally protruding horns of the dock cleat and also provides an additional surface for guiding a rope or docking line. The protection is provided by a smooth sloping surface (13) aligned in front of and parrallel to the protruding horn so that a person's foot moving towards the end of the horn is deflected away. The additional guiding surface (12) is positioned opposite the dock cleat's guiding surface so that a person can guide the boat from either direction without removing the rope. On a typical dock cleat, if the boat moves past the cleat it is neccessary to remove the line from the cleat and place it back on the cleat at the other end. Normal installation would require two safety adaptors for each dock cleat, placed on opposite sides of the cleat to provide protection from each horn.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: December 26, 1995
    Inventor: Alan P. Lawrence
  • Patent number: 5365778
    Abstract: An ultrasonic viscometer and method for measuring fluid viscosity are provided. Ultrasonic shear and longitudinal waves are generated and coupled to the fluid. Reflections from the generated ultrasonic shear and longitudinal waves are detected. Phase velocity of the fluid is determined responsive to the detected ultrasonic longitudinal waves reflections. Viscosity of the fluid is determined responsive to the detected ultrasonic shear waves reflections. Unique features of the ultrasonic viscometer include the use of a two-interface fluid and air transducer wedge to measure relative signal change and to enable self calibration and the use of a ratio of reflection coefficients for two different frequencies to compensate for environmental changes, such as temperature.
    Type: Grant
    Filed: January 28, 1994
    Date of Patent: November 22, 1994
    Assignee: The University of Chicago
    Inventors: Shuh-Haw Sheen, William P. Lawrence, Hual-Te Chien, Apostolos C. Raptis
  • Patent number: 5268146
    Abstract: A dry test panel for the testing of samples such as undiluted bodily fluid specimens is disclosed. The panel contains all reagents and components necessary to achieve a visible indication of the presence or absence of a suspect analyte in the sample, and preferred embodiments contain positive and negative controls as well. The device contains an internal chamber into which the specimen is introduced, and which contains all materials necessary for the reactions which produce a color change which is visible on the outer surface of the device. The materials are positioned in the chamber in such a manner that they are activated only when the chamber is filled with the specimen, and the color indicator is concentrated in a thin lamina immediately adjacent to a light-transmitting wall of the device so that a detectable color change occurs in a short period of time to produce a sensitive and yet fast test.
    Type: Grant
    Filed: March 25, 1992
    Date of Patent: December 7, 1993
    Assignee: Litmus Concepts, Inc.
    Inventors: Paul J. Lawrence, Marian B. Buccafurni, Leah P. Lawrence
  • Patent number: 5047239
    Abstract: Preharvest peaches, postharvest apples and postharvest grapes are coated with Bacillus subtilis B-3 to inhibit growth of brown rot, gray mold rot and bitter rot.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: September 10, 1991
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventor: P. Lawrence Pusey
  • Patent number: 4931441
    Abstract: A leucovorin composition having improved properties is provided by an aqueous, isotonic, sterile leucovorin calcium solution having a pH in the range 6.5-8.5 and containing as a buffer therein sodium citrate dihydrate in the amount in the range 1 mg-32 mg/mL, the leucovorin composition containing leucovorin calcium pentahydrate in the amount 6.35 mg/mL, equivalent to 5 mg/mL leucovorin content. A preferred sterile, aqueous leucovorin solution in accordance with this invention contains 6.35 mg/mL leucovorin calcium pentahydrate, 22 mg/mL sodium citrate dihydrate, the remainder being sterile water. The pH of this solution is adjusted to 8.1.+-.0.1 with 1N NaOH solution and/or 1N citric acid solution.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: June 5, 1990
    Assignee: Luitpold Pharmaceuticals, Inc.
    Inventor: Richard P. Lawrence
  • Patent number: 4694935
    Abstract: The invention discloses an automated hydraulic valve, for use in an elevator propulsion system. The elevator includes a car which is powered by a piston which moves within a cylinder. The automated valve controls the flow of hydraulic fluid into and out of the cylinder. The valve insures that the acceleration and deceleration of the elevator car will be uniform, and that the acceleration or deceleration will occur over a constant, predetermined interval, regardless of the load in the car. The control valve allows fluid to flow from a reservoir, and into the cylinder or back to the reservoir, with varying rates of flow. When fluid is directed into the cylinder, the elevator ascends. When fluid is allowed out of the cylinder, the elevator descends. The operation of the control valve is governed by a bypass piston assembly which is moved in response to the sensed pressure in the cylinder and the pressure in the valve.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: September 22, 1987
    Assignee: Cemco, Inc.
    Inventor: William A. P. Lawrence
  • Patent number: 4538418
    Abstract: A heat pump system (10) includes a fluid refrigerant compressor (12) and heat exchanger units (14, 16). Heat transfer tubings (36, 50, 58, 60, 66, 82) interconnect the fluid refrigerant compressor (12) and the heat exchanger units (14, 16) in a series relationship for carrying refrigerant fluid. Flow control valves (22, 24) are provided and are interconnected between a water source (20) and the heat exchanger unit (16) for controlling the amount of water flowing from the water source (20) to the heat exchanger unit (16). The flow control valves (22, 24) are responsive to the pressure at the outlet (12b) of the fluid refrigerant compressor (12) sensed at port (26) in the heat transfer tubing (58) to automatically optimize the operating condition of the heat pump system (10). To further optimize the heat pump system (10) in the heating mode, water from source water (20) flows through preheat exchanger (104) before entering heat exchanger unit (16 ).
    Type: Grant
    Filed: February 16, 1984
    Date of Patent: September 3, 1985
    Assignee: DeMarco Energy Systems, Inc.
    Inventors: John P. Lawrence, Manoucher Felfeli
  • Patent number: 4481693
    Abstract: Method for treating fish carcasses for separating flesh from frames and skins by a squeezing action of a pair of contra-rotating rollers between which decapitated and gutted fishes or tail sections of fishes are passed tail first. An apparatus for executing said method comprises at least two pairs of contra-rotatable rollers (209, 210, 212, 213) having parallel upright axes and each having at least a resilient surface, the first pair (209, 210), as viewed in the direction of transport, being at a greater mutual distance than the second pair (212, 213).
    Type: Grant
    Filed: October 14, 1981
    Date of Patent: November 13, 1984
    Assignee: Internationale Octrooi Maatschappij "Octropa" B.V.
    Inventors: William P. Cowie, Drummond M. P. Lawrence, Morgan H. Goodlad
  • Patent number: 4365051
    Abstract: A polyurethane prepared by reacting specifically identified substituted aromatic diamines with isocyanate-terminated prepolymer. Prepolymer is prepared by reacting polyisocyanate with polymeric polyol. Diamines are required to be selected from specified substituted butylbenzoates, benzonitriles or benzoates. The diamine curative is taught to enhance the processing of the prepolymer/diamine mixture for commercial application.
    Type: Grant
    Filed: April 3, 1981
    Date of Patent: December 21, 1982
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Daniel A. Chung, John P. Lawrence
  • Patent number: 4254272
    Abstract: The invention relates to substituted aromatic diamines and polyurethanes cured thereby. The diamines are individually selected from 3,5-diamino-4-tert-alkylbenzoates, 3,5-diamino-4-tert-alkylbenzonitriles and alkylene bis(3-amino-4-tert-alkylbenzoate).
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: March 3, 1981
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Daniel A. Chung, John P. Lawrence
  • Patent number: 4246913
    Abstract: A device for use by a smoker in developing a subconscious aversion to smoking. The device includes a special pressure transducer that is coupled to a holder for a smoking article such as a cigarette, for sensing whenever smoke is drawn from the cigarette and for producing a corresponding electrical control signal. The device further includes a transformer for converting the control signal to an electrical shock signal having a substantially higher voltage level, a potentiometer for permitting a manual adjustment of the voltage of the shock signal to a prescribed level, and a pair of electrodes for coupling the shock signal to the skin of the smoker, whereby every time smoke is drawn from the cigarette, a small, but annoying, electrical shock is received by the smoker.
    Type: Grant
    Filed: April 2, 1979
    Date of Patent: January 27, 1981
    Assignee: Henry R. Harrison
    Inventors: Richard G. Ogden, Robert P. Lawrence
  • Patent number: 4222955
    Abstract: The invention relates to substituted aromatic diamines and polyurethanes cured thereby. The diamines are individually selected from 3,5-diamino-4-tert-alkylbenzoates, 3,5-diamino-4-tert-alkylbenzonitriles and alkylene bis(3-amino-4-tert-alkylbenzoate).
    Type: Grant
    Filed: August 31, 1979
    Date of Patent: September 16, 1980
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Daniel A. Chung, John P. Lawrence
  • Patent number: 4199120
    Abstract: A plug type door for a pressurizable aircraft fuselage is mounted by a door hinge assembly for swinging movement into and out of a door opening in the fuselage. The door is composed of three segments that are hinged to each other so that the door can be folded from a fully closed position in which the three segments are serially arranged to completely cover the door opening, into an unplugged position in which the three segments are oriented in a generally Z-shaped configuration. Stop members are mounted on the fuselage adjacent the door opening and cooperate with corresponding stop members on the door to plug or secure the door in the door opening when the door is in a closed position. The stop members on the door and the door opening deregister as the door is folded to free the door for outward swinging movement about the hinge assembly.
    Type: Grant
    Filed: November 1, 1977
    Date of Patent: April 22, 1980
    Assignee: The Boeing Company
    Inventors: Burton Bergman, Brian P. Lawrence
  • Patent number: 4194534
    Abstract: When a Hydraulically operated valve is used to control the operation of a hydraulic elevator, it is required to do so in a manner such that as the elevator cab approaches a floor level in either direction, it is first decelerated through a transition cycle and after that moved slowly a short distance through a creeping cycle to the floor level where it stops. In the up direction, an extra heavy load cuts the transistion time and adds objectionably to the time needed for up leveling. The compensating valve of the invention is interposed in the hydraulic line of the operating valve which normally is depended on to cause deceleration for transition, replacing the deceleration valve. A plunger in the compensating valve is shifted by an increase in hydraulic pressure resulting from an extra heavy load.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: March 25, 1980
    Assignee: Elevator Equipment Co.
    Inventors: William A. P. Lawrence, Robert J. Welchel
  • Patent number: 4137894
    Abstract: This disclosure relates to a tire and rim combination having run-flat capabilites. These capabilities are provided by a run-flat support system which is comprised of a pneumatic tube member located in the drop center area of the rim and an annular, "free-floating" ring member riding on the tube which contacts only the tube when the tire is operating under normal conditions and only the tube and inner periphery of the tread area of the tire when the tire is run flat.
    Type: Grant
    Filed: June 17, 1977
    Date of Patent: February 6, 1979
    Assignee: The Firestone Tire & Rubber Company
    Inventors: James D. Gardner, James P. Lawrence
  • Patent number: RE30902
    Abstract: When a Hydraulically operated valve is used to control the operation of a hydraulic elevator, it is required to do so in a manner such that as the elevator cab approaches a floor level in either direction, it is first decelerated through a transition cycle and after that moved slowly a short distance through a creeping cycle to the floor level where it stops. In the up direction, an extra heavy load cuts the transistion time and adds objectionably to the time needed for up leveling. The compensating valve of the invention is interposed in the hydraulic line of the operating valve which normally is depended on to cause deceleration for transition, replacing the deceleration valve. A plunger in the compensating valve is shifted by an increase in hydraulic pressure resulting from an extra heavy load.
    Type: Grant
    Filed: December 24, 1980
    Date of Patent: April 13, 1982
    Assignee: Elevator Equipment Co.
    Inventors: William A. P. Lawrence, Robert J. Whelchel