Patents by Inventor Valdemar R. Birn

Valdemar R. Birn 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).

  • V-belt pulley
    Patent number: 6488604
    Abstract: V-belt pulley comprising an outer rim (2) provided with at least one V-belt groove (7) formed by turning, said groove (7) having a bottom (9) provided with a plurality of radially through-going and circumferentially interspaced openings (8). The pulley is cast with a rim (2) having a radially inwardly facing surface (4) is provided with a plurality of circumferentially interspaced recesses (5) of such a radial depth that the radially through-going openings are formed by the turning thereof.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: December 3, 2002
    Assignee: Vald.Birns Maskinfabrik A/S
    Inventor: Valdemar R. Birn