Patents by Inventor Leif A. Holan

Leif A. Holan 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).

  • Patent number: 4891862
    Abstract: A self-closing hinge comprises a pair of hinge leaves pivotally interconnected by an offset hinge pin. One leaf has a flanged head projecting substantially radially with respect to a sleeve of the other hinge leaf, within which the hinge pin is mounted. The external surface of the sleeve serves as a cam surface against which a follower element carried on the head of the other leaf is biased. The cam follower comprises a tubular spring-steel member oriented parallel to the hinge pin and generates a force through the head of the other leaf along an axis distally offset relative to the axis of the hinge pin. During closing of the hinge the follower is brought into registration with a pocket formed in the sleeve to effect a rocking movement of the follower about one edge of the pocket to generate a self-closing moment.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: January 9, 1990
    Inventor: Leif A. Holan
  • Patent number: 4819299
    Abstract: A self-closing hinge comprising a pair of hinge leaves pivotally interconnected by an offset hinge pin. A spring tang is formed integrally with one of the hinge members and has a distal end that has a head projecting substantially radially with respect to a sleeve of the other hinge leaf within which the hinge pin is mounted. The external surface of the sleeve serves as a cam surface against which a follower element carried on the head of the spring tang is biased. The line of force exerted by the head of the tang through the follower is distally offset relative to the axis of the hinge pin. During closing of the hinge the follower is brought into registration with a pocket formed in the sleeve effecting a rocking movement of the follower about one edge of the pocket to generate a self-closing moment.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: April 11, 1989
    Inventor: Leif A. Holan
  • Patent number: 3981468
    Abstract: A stand including a body member and a leg member which may be pivotally moved about an axis and wherein the axis itself may be moved relative to the body member.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: September 21, 1976
    Inventor: Leif A. Holan