Patents by Inventor Hugh E. Keyes

Hugh E. Keyes 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).

  • Master cylinder with caging means to secure return spring limiting stud
    Patent number: 5279125
    Abstract: Structure for caging a return spring of a master cylinder to define limits for an operational chamber. The structure includes a first cylindrical member which engages a first piston and a second cylindrical member which engages a second piston with the return spring being located between the first and second cylindrical members. A stud which has an irregular shaped end member is retained in a groove in the second piston by the second cylindrical member and mated with a head member to define the limits for the return spring between the first and second cylindrical members and correspondingly the maximum size of the chamber within a bore of a master cylinder.
    Type: Grant
    Filed: December 8, 1992
    Date of Patent: January 18, 1994
    Assignee: Allied-Signal Inc.
    Inventors: Hugh E. Keyes, Robert K. Wilson, Donald A. Crumb