Patents by Inventor T. Graham Parr

T. Graham Parr 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: 4932369
    Abstract: An internal combustion engine inlet manifold is disclosed which comprises of a housing defining a plenum, at least one inlet tract and at least one rotary valve member supported by the housing. The or each inlet tract has first and second lengths one of which extends away from the plenum for connection to an engine to which the inlet manifold is to be connected. The or each valve member is arranged to be rotatable from a first position in which the first and second lengths are connected in series between the plenum and the engine via the or each valve member and a second position in which connection is made between the plenum and the engine solely by means of the first length of the or each inlet tract via the or each valve member.
    Type: Grant
    Filed: July 26, 1989
    Date of Patent: June 12, 1990
    Assignee: Austin Rover Group Limited
    Inventor: T. Graham Parr