Patents by Inventor David E. Brann

David E. Brann 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).

  • Iron piston having selectively hardened ring groove
    Patent number: 4643079
    Abstract: A cast iron piston characterized by a pearlitic matrix microstructure comprises a ring groove defined by opposed faces that are selectively hardened adjacent the piston side wall. The hardened surfaces are characterized by a martensitic matrix microstructure having a Knoop hardness of preferably at least 690. In a preferred embodiment, the groove faces are hardened by a stripe hardening process.
    Type: Grant
    Filed: March 28, 1985
    Date of Patent: February 17, 1987
    Assignee: General Motors Corporation
    Inventors: David E. Brann, James E. Lindsay
  • High output oil cooled floating piston
    Patent number: 4502422
    Abstract: An oil cooled piston particularly for two cycle direct injection diesel engines offers improved cooling through increasing of the combustion bowl rim radius and modifications to the understructure to provide alternate perforate gussets permitting an increased number of rim cooling ribs. An angular break from the rim radius to the squish land offsets efficiency impairment from the larger rim radius.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: March 5, 1985
    Assignee: General Motors Corporation
    Inventor: David E. Brann