Patents by Inventor Francis Anthony Haskew

Francis Anthony Haskew 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).

  • Methods of and apparatus for controlling hydraulic equipment
    Patent number: 4041841
    Abstract: A control for hydraulic equipment including a pressure fluid feed and a pressure fluid return, includes a spool valve arranged to sense the pressure of the pressure fluid in the return and to connect pressure fluid in the feed to exhaust should the sensed pressure fall below a preselected level.
    Type: Grant
    Filed: February 13, 1976
    Date of Patent: August 16, 1977
    Assignee: Coal Industry (Patents) Ltd.
    Inventor: Francis Anthony Haskew