Patents by Inventor Hannsjorg Stumpf

Hannsjorg Stumpf 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: 5443134
    Abstract: A hydraulic actuating device for brakes and gearshifts on bicycles or the like comprises an actuating lever (1b), a transmitting cylinder (1a), a flexible pressure line (9) and a receiving cylinder (1). The receiving cylinder (1) is connected with a first component (A) of a device to be actuated, and the piston (20) in the receiving cylinder (1) is mechanically connected with a second component (B) of the device by a traction cable (25).
    Type: Grant
    Filed: December 7, 1993
    Date of Patent: August 22, 1995
    Assignee: Fichtel & Sachs AG
    Inventors: Joachim Gajek, Hannsjorg Stumpf
  • Patent number: 5358078
    Abstract: In accordance with the invention, a hydraulic disk brake for bicycles is provided which includes a brake caliper 1, 101, a brake piston 8, 108, 208, and a guide cylinder 2, with the aid of which the brake system can be pre-adjusted in a coarse manner with respect to the bicycle frame. The total clearance (=2.times."s"), of the brake linings 18a, 18b is capable of pre-adjustment. The central position of the brake caliber 1, with respect to the brake disk 21, can be adjusted via an adjusting screw 22. The brake is arranged for constant, equal clearance on both sides of the brake disk 21 in the unstressed condition of the brake, such clearance being ensured on the basis of the spring-action, pre-tensioning of the brake piston 8, 108, 208, with respect to the brake caliper 1, as well as of the spring-action pre-tensioning of the brake caliper 1, 101 with respect to the guide cylinder 2.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: October 25, 1994
    Assignee: Fichtel & Sachs AG
    Inventors: Joachim Gajek, Hannsjorg Stumpf