Patents by Inventor Alexander Litwinchuk

Alexander Litwinchuk 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).

  • Hydraulic lash adjuster with multi-directional check valve
    Patent number: 4807575
    Abstract: In a hydraulic lash adjuster, a flat reed valve is used to control oil flow from a reservoir chamber to a pressure chamber, the reed valve including a semi-circular flapper flexibly connected by a spring leg to a split retainer ring.
    Type: Grant
    Filed: November 23, 1987
    Date of Patent: February 28, 1989
    Assignee: General Motors Corporation
    Inventors: Alexander Litwinchuk, Lowell E. Dura, Adrian Dekker