Patents by Inventor John R. Pfeifler, II

John R. Pfeifler, II 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).

  • Control connector
    Patent number: 4440423
    Abstract: A two member control connector for joining multiple hydraulic control conduits (20) has one member (14) attached to the underwater equipment. The other member (10) is raisable to the water surface and also carries annular seal assemblies (24) around the mating ends of the conduits (20). The seal assemblies are each retained in a dove-tail groove (26). A vent passageway (42) is also provided in either the seal or the member (10) to prevent the occurance of differential pressure under the assembly, possibly resulting in seal loss.
    Type: Grant
    Filed: May 27, 1982
    Date of Patent: April 3, 1984
    Assignee: Vetco Offshore, Inc.
    Inventor: John R. Pfeifler, II