Patents by Inventor Carl W. Crispin

Carl W. Crispin 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).

  • Tread ring venting and pressurization system
    Patent number: 4895502
    Abstract: Tire mold vents (34) in communication with a sealed cavity (35) are pressurized for limiting the quantity of rubber entering the vents (34) and for assisting the stripping of the vulcanized tire (28) from the mold. Passages (40) in the mold communicate fluid pressure to the vents (34) and pressure regulators (58,60) control the fluid pressure communicated to the vents (34) during vulcanization and during ejection of the tire (28) from the mold (10).
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: January 23, 1990
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Richard C. Beard, Carl W. Crispin
  • Pressurization of tire mold vents
    Patent number: 4812281
    Abstract: Tire mold vents (34) in communication with a sealed cavity (35) are pressurized for limiting the quantity of rubber entering the vents (34) and for assisting the stripping of the vulcanized tire (28) from the mold. Passages (40) in the mold communicate fluid pressure to the vents (34) and pressure regulators (58,60) control the fluid pressure communicated to the vents (34) during vulcanization and during ejection of the tire (28) from the mold (10).
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: March 14, 1989
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Richard C. Beard, Carl W. Crispin