Patents by Inventor David N. Attwood

David N. Attwood 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).

  • Fluid conduit coupling apparatus
    Patent number: 4911406
    Abstract: A quick connect coupling for fluid conduits having an outer cylindrical member and an inner conduit fitted within the outer cylindrical member including a continuous circular gripper ring seated in the outer cylindrical member and having radially inward gripper teeth bent axially forward toward the outer cylindrical member in a generally conical plane, each tooth has a twist in a common direction whereby the inner conduit can be slid into the gripper ring but removed from the gripper ring only by unscrewing from the gripper ring.
    Type: Grant
    Filed: January 11, 1989
    Date of Patent: March 27, 1990
    Assignee: Accor Technology, Inc.
    Inventor: David N. Attwood