Patents by Inventor Francis H. Boor

Francis H. Boor 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).

  • Shaft and bore combination
    Patent number: 4136582
    Abstract: The present application discloses structure which produces area contact in place of point or line contact between a cylindrical shaft and a cylindrical bore. When the area of contact is increased, the unit pressure is reduced which results in less wear and longer life. The combination of the present invention includes a shaft having an external surface and a member in the nature of a gear or the like which has a bore surrounding the shaft and which bore includes an internal surface. The present invention involves the situation wherein one of the shaft and member is fixed and the other of the shaft and member is rotatable. The improvement of the present invention involves the situation wherein the surface of the rotatable one of the two above mentioned members is provided with a first cooperating surface portion which has a constant radius and which extends through an angle 360.degree..
    Type: Grant
    Filed: April 21, 1976
    Date of Patent: January 30, 1979
    Assignee: Fairfield Manufacturing Co., Inc.
    Inventor: Francis H. Boor