Patents by Inventor Alfred C. LaGrow

Alfred C. LaGrow 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).

  • Recreational device for impelling an object
    Patent number: 4488723
    Abstract: A recreational device 10 for impelling an object comprises a generally upright shaft 12 having a lower end 20 and an intermediate part 22; a lever arm 14 having a heel portion 40 and an upper actuation portion 42 pivotally connected to the lower end 20 of the shaft 12; a stabilizing link 24 pivotally connected to the intermediate part 22 of the shaft 12, and a linkage assembly 32 for urging the object forwardly in response to downward movement of the shaft 12, the reaction of the heel portion 40 against a surface, and the forwardly and downwardly swinging of the lever arm 14.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: December 18, 1984
    Inventor: Alfred C. LaGrow
  • Apparatus for disassembly of a tapered connection using fluid pressure
    Patent number: 4154543
    Abstract: Apparatus is provided for disassembly of a tapered connection (20) by injecting fluid into a threaded bolt hole (24) and pressurizing the fluid by tightening the bolt (34). The pressurized fluid between the members (12, 14) forming the connection (20) forces the members (12, 14) to separate. The apparatus purges compressible air from the connection (20) thereby allowing the pressure to build and separate the members (12, 14).
    Type: Grant
    Filed: April 28, 1978
    Date of Patent: May 15, 1979
    Assignee: Caterpillar Tractor Co.
    Inventors: Clinton F. Moewe, Alfred C. LaGrow