Patents by Inventor Wallace C. Knapp

Wallace C. Knapp 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).

  • Reciprocatory air motor with cushioning pistons
    Patent number: 4492147
    Abstract: A reciprocatory air motor has a main plunger valve the position of which controls the flow of air to opposite sides of a main motor piston. Positioning of the plunger valve is itself controlled by a pair of cushion pistons carried on the piston rod of the motor. A space between the cushion pistons is used for the compression of air to effect absorption of the kinetic energy of the moving parts of the motor at opposite ends of the stroke.
    Type: Grant
    Filed: December 30, 1983
    Date of Patent: January 8, 1985
    Assignee: Knapp Pneumatics, Inc.
    Inventor: Wallace C. Knapp