Patents by Inventor Thomas J. Burgan

Thomas J. Burgan 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 seals with self-venting auxiliary lips
    Patent number: 4522411
    Abstract: A pumping seal having an elastomeric hydrodynamic primary lip and a resinous fluorocarbon auxiliary lip. The auxiliary lip is of completely or partially frusto-conical form in at least one portion so as to provide desirable venting geometry. Said auxiliary lip is bonded to a portion of the primary seal lip adjacent the area at which the primary lip is bonded to the casing of the seal. The seal provides a strong pumping action without providing the potential for drawing a measurable vacuum in the inter-lip area.
    Type: Grant
    Filed: October 1, 1984
    Date of Patent: June 11, 1985
    Assignee: Chicago Rawhide Mfg. Co.
    Inventor: Thomas J. Burgan