Patents by Inventor Robert W. Hewlitt

Robert W. Hewlitt 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: 4506645
    Abstract: A load carrying assembly is disclosed for an internal combustion engine. The engine includes an engine block having a cylinder formed therein and having a cylinder head mounted onto the block. The cylinder head has a deck surface which closes off one end of the cylinder. A piston is reciprocally mounted in the cylinder and cooperates with the deck surface to form a combustion chamber. Air and combustion gases enter and exit the combustion chamber through intake and exhaust passages formed in the cylinder head and which terminate into intake and exhaust ports formed in the deck surface. The outer peripheries of the adjacent intake and exhaust ports form a bridge section therebetween having a maximum length which is less than twice the diameter of the larger of the intake and exhaust ports. Formed at least partially within the bridge section is a nozzle bore which also communicates with the combustion chamber.
    Type: Grant
    Filed: June 10, 1983
    Date of Patent: March 26, 1985
    Assignee: Deere & Company
    Inventors: Robert W. Hewlitt, James H. Ruff, Aubrey E. Haight
  • Patent number: 3954135
    Abstract: A three part seal assembly for sealing the rotatable disk regenerator of a gas turbine engine is disclosed. Each part of the seal assembly generally includes a base having one side carrying low friction means for engaging the regenerator and another side carrying a spring mechanism for making sealing contact with a surface on the engine housing and urging the low friction means into sealing engagement with the regenerator. One part of the seal assembly is in the form of a linear crossbar having a spring mechanism including generally parallel, longitudinally extending spring and retainer members. Each of these members has a first portion affixed to the base and a second portion extending away from the base in cantilever fashion. The cantilevered, second portions of the spring and retainer members are in parallel, spaced-apart relation.
    Type: Grant
    Filed: December 4, 1974
    Date of Patent: May 4, 1976
    Assignee: Deere & Company
    Inventor: Robert W. Hewlitt