Patents by Inventor Willard F. Simpson

Willard F. Simpson 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).

  • Single chamber recharger
    Patent number: H163
    Abstract: The invention discloses a self-controlled, portable gas compressor which lizes a low pressure air source to compress a high pressure air source in a single stage booster compressor pump which is automatically shut down by an air pilot switch when a predetermined pressure is reached.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: November 4, 1986
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: William J. Spraker, Willard F. Simpson