Patents by Inventor David A. Paul

David A. Paul 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: 6283139
    Abstract: A remote controlled hose valve system for use with a water source and a hose having one end connectable to a fluid activated device and an opposite connector end is disclosed. The hose valve system includes a valve unit and a remote control unit. The valve unit has an inlet coupler connectable to the water source. The valve unit also has a hose coupler coupled to the opposite connector end of the hose. A conduit allows fluid flow between the inlet coupler and the hose coupler. A valve is located in the conduit and permits fluid flow in the conduit. An actuator which may be an electric motor is connected to the valve. A power source is provided for the actuator. A signal receiver is coupled to the power source and the actuator. The receiver allows power flow to the actuator to close or open the valve in response to a unique signal. The remote control unit includes a transmitter which sends a unique signal to open or close the valve.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: September 4, 2001
    Assignee: L. R. Nelson Corporation
    Inventors: Randall R. Symonds, David A. Paul, Scott Jacobs
  • Patent number: 5815826
    Abstract: A method for automatically determining the productivity of an earthmoving machine in real time using an onboard computer. The earthmoving machine operates in cycles having a first portion and a second portion. The earthmoving machine moves in a first direction during the first portion and in a second direction during the second portion. The method includes the steps of detecting the starts of each cycle for a series of cycles, determining a machine parameter corresponding to each cycle, calculating a cycle parameter as a function of the machine parameter, and calculating at least one measure of productivity as a function of the cycle parameter.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: September 29, 1998
    Assignee: Caterpillar Inc.
    Inventors: Daniel E. Henderson, Charlene L. Oliver, David A. Paul
  • Patent number: 5735352
    Abstract: The present invention provides a method for updating a site database. The site database models the elevation of a work site using a Triangular Irregular Network (TIN). The TIN is composed of a plurality of points. Each point has associated known X and Y coordinates and a known elevation and is associated with a set of other points in the network to form triangles. The work site is modified by a work machine. The method includes the steps of receiving a new set of points. The new set of points includes at least first and second points. The first and second points have associated X, Y, and Z coordinates. The method also includes the steps of comparing the new set of points with a previous set of points and updating the triangular irregular network with the new set of points if a minimum distance has been traversed by the work machine.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: April 7, 1998
    Assignee: Caterpillar Inc.
    Inventors: Daniel E. Henderson, Craig L. Koehrsen, David A. Paul, William C. Sahm
  • Patent number: 5379220
    Abstract: Vehicles having front and rear steerable wheels (14,16) and a plurality of steering modes are commonly used in many applications. A vehicle (10) includes a steering input device (24) having a plurality of positions corresponding to the desired rate of turn of the vehicle (10) and a steering control (23) for changing the steering mode in which the vehicle (10) is operating. The steering control accomplishes (23) the steering mode transition while causing the rate of turn of the vehicle (10) to be substantially equal to the desired rate of turn throughout the transition.
    Type: Grant
    Filed: July 29, 1991
    Date of Patent: January 3, 1995
    Assignee: Caterpillar Inc.
    Inventors: William E. Allen, David A. Paul