Patents by Inventor Larry A. Druga

Larry A. Druga 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).

  • Dual direction bypass valve
    Patent number: 6875343
    Abstract: A dual direction bypass valve allows a transmission filter to function whether or not it is placed in the vehicle transmission correctly. The filter includes a front and rear valve bodies separated by an end cap, and each having a spring and disk. When the filter media is clogged during normal forward flow, the fluid pressure on the rear valve body disk compresses the spring, opening an aperture in the end cap, allowing the fluid to pass from the front valve body through the rear valve body to the outlet, bypassing the filter media. If the transmission filter is placed in the engine backwards, the fluid pressure compresses the spring of the front valve body and opens up apertures in the end cap, such that the fluid flows through the apertures and the front valve body, bypassing the rear valve body and the filter media, to exit the filter.
    Type: Grant
    Filed: August 21, 2001
    Date of Patent: April 5, 2005
    Assignee: SPX Corporation
    Inventor: Larry A. Druga
  • Dual direction bypass valve
    Publication number: 20030010725
    Abstract: A dual direction bypass valve allows a transmission filter to function whether or not it is placed in the vehicle transmission correctly. The filter includes a front and rear valve bodies separated by an end cap, and each having a spring and disk. When the filter media is clogged during normal forward flow, the fluid pressure on the rear valve body disk compresses the spring, opening an aperture in the end cap, allowing the fluid to pass from the front valve body through the rear valve body to the outlet, bypassing the filter media. If the transmission filter is placed in the engine backwards, the fluid pressure compresses the spring of the front valve body and opens up apertures in the end cap, such that the fluid flows through the apertures and the front valve body, bypassing the rear valve body and the filter media, to exit the filter.
    Type: Application
    Filed: August 21, 2001
    Publication date: January 16, 2003
    Inventor: Larry A. Druga
  • Fuel/water separating filter assembly
    Patent number: D452896
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: January 8, 2002
    Assignee: SPX Corporation
    Inventor: Larry Druga
  • Fuel/water separating filter
    Patent number: D466969
    Type: Grant
    Filed: August 14, 2001
    Date of Patent: December 10, 2002
    Assignee: SPX Corporation
    Inventor: Larry Druga