Patents by Inventor Paul A. Knapp

Paul A. 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).

  • Patent number: 4804017
    Abstract: Method and apparatus for bleeding brakes includes a brake valve with an integral ball check which secures directly to a brake wheel cylinder. Method for bleeding the brakes includes securing a brake bleeder valve with integral check valve in each wheel cylinder, securing a predetermined length of tubing to the brake bleeder valve, providing a reservoir for brake fluid at the end of the tubing remote from the brake bleeder valve, and pressurizing the brake system.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: February 14, 1989
    Inventor: Paul A. Knapp
  • Patent number: 4709722
    Abstract: Valve apparatus for draining oil from a vehicle crankcase includes a valve body having a pair of intersecting bores. One of the bores communicates with the vehicle crankcase and receives oil therefrom. A tubular insert extends into the intersecting bore, with part of the insert extending outwardly from the valve body. The end of the insert which is disposed within the valve body comprises a valve seat, and a spring-loaded ball check is disposed within the tubular insert. The spring biases the ball against the seat until low pressure is applied to the insert to withdraw the ball from the seat. When the ball is withdrawn from the seat, oil is drained from the crankcase. A hose or tube is secured to the end of the insert outside of the valve body and is appropriately connected to a source of low pressure for draining the oil.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: December 1, 1987
    Inventor: Paul A. Knapp
  • Patent number: 4372068
    Abstract: Apparatus for viewing a transparency includes a rechargeable battery and a telescoping lens housing which moves inwardly and outwardly with respect to a housing in which is disposed the rechargeable battery, a light source, and a solid diffuser/reflector block for diffusing and reflecting light from the light source over substantially the entire area of the transparency.
    Type: Grant
    Filed: August 4, 1980
    Date of Patent: February 8, 1983
    Assignee: Frederick A. Major
    Inventors: Paul A. Knapp, Frederick A. Major
  • Patent number: 4190356
    Abstract: A photographic easel includes a plurality of panels movable separately and independently of each other for exposing sequential portions of photographic material disposed on the easel.
    Type: Grant
    Filed: June 1, 1978
    Date of Patent: February 26, 1980
    Inventor: Paul A. Knapp
  • Patent number: 4027318
    Abstract: Camera foot apparatus is disclosed which attaches on to the bottom of a camera to stabilize the camera by providing an area beneath the lens of the camera on which the camera is disposed.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: May 31, 1977
    Inventor: Paul A. Knapp