Patents by Inventor Peter Holborow

Peter Holborow 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: 4976286
    Abstract: A four-way slide valve including an elongated valve body having an inlet port, an outlet port, and two working ports. A slide assembly within the body is movable longitudinally to alternatively interconnect the outlet port with one or the other of the working ports. The slide assembly carries two longitudinally spaced-apart first and second pistons which define first and second chambers between the pistons and their respective ends of the valve body. Passageways within the slide assembly provide communication between the first chamber and the outlet port, and a control device, such as a pilot valve within the valve body, selectively provides communication between the second chamber and either the inlet port or the outlet port, so as to cause the slide member to move to one of its extreme positions or the other.
    Type: Grant
    Filed: December 14, 1989
    Date of Patent: December 11, 1990
    Assignee: Automatic Switch Company
    Inventors: Peter Holborow, Gary Kramer