Patents by Inventor Stuart J. Briggs

Stuart J. Briggs 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).

  • Brake servo booster
    Patent number: 4953444
    Abstract: A vehicle brake servo booster has a housing divided into pressure chambers by a movable partition carried by a reciprocable hub member. A switch device is mounted on the housing and operable by an abutment member carried by a reciprocable piston to control an electrical circuit supplying a vehicle rear brake warning light.
    Type: Grant
    Filed: January 31, 1989
    Date of Patent: September 4, 1990
    Assignee: Lucas Industries public limited company
    Inventors: Philip Cunningham, Stuart J. Briggs
  • Brake servo booster
    Patent number: 4944214
    Abstract: A brake servo booster has a housing (1) divided into two chambers (A, B) by a movable partition (5) which includes a diaphragm (6). A protective boot (14) for a support member (11) extending through the housing is connected to the diaphragm by a carrier member (16) engaged by adjacent portions (14A, 6A) of the boot and diaphragm in a manner which avoids direct contact between these portions and facilitates assembly of the booster.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: July 31, 1990
    Assignee: Lucas Industries Public Limited Company
    Inventor: Stuart J. Briggs
  • Master cylinder
    Patent number: 4702078
    Abstract: A fabricated master cylinder includes a pressure cylinder and a separately made reservoir mounted thereon by way of a mounting device on the cylinder and a mounting formation on the reservoir. The mounting device and reservoir provide restraint surfaces for engagement by a locking device which, when engaged, maintains the cylinder and reservoir in co-operative relationship. In an alternative arrangement, the restraint surfaces are on respective parts of the mounting device and formation which, themselves act as locking means.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: October 27, 1987
    Assignee: Lucas Industries Public Limited, Co.
    Inventors: Stuart J. Briggs, David J. Parker, Peter Schluter