Patents by Inventor Timothy Bethke

Timothy Bethke 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).

  • Apparatus for coupling tubular members
    Patent number: 4790574
    Abstract: A clamp suitable for joining a pair of tubular members, e.g., commercial truck exhaust pipes. One clamp (70) according to the invention includes an S-shaped band (72) having a pair of forward curved portions (76) on either side of a reverse curved portion (78). Attached to each forward curved portion (76) is a reinforcing bar (74) preferably forming a pair of D-shaped holes (75) suitable for receiving "half-carriage" bolts (100). The band (72) is preferably formed from Type 409 stainless steel to reduce costs. A fully preformed (cylindrical) embodiment (120) and flat embodiment (130) are also disclosed.
    Type: Grant
    Filed: January 16, 1987
    Date of Patent: December 13, 1988
    Assignee: Donaldson Company, Inc.
    Inventors: Wayne M. Wagner, Douglas E. Flemming, Gary J. Rocklitz, Timothy Bethke