Patents by Inventor John Patrick Welch

John Patrick Welch 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).

  • Head port sealing gasket for a compressor
    Patent number: 5683235
    Abstract: A head port sealing gasket (56) is disclosed for use in a barrel compressor (40) which has a head (42) fit within a barrel casing (44). The sealing gasket (56) has a curved outer surface (60) matching the curvature of the inner diameter of the barrel casing (44). An O-ring is fit within an O-ring groove (62) in the outer surface to sealingly engage the inner surface of the barrel casing. The sealing gasket (56) is received within a port (68) formed into the outer cylindrical surface of the head. A chamfer (92) on the end of the casing (44) allows the head and sealing gasket mounted thereon to be slid into the proper position within the barrel casing without damage to the O-ring.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: November 4, 1997
    Assignee: Dresser-Rand Company
    Inventor: John Patrick Welch