Patents by Inventor Uno Ingemar Kraft

Uno Ingemar Kraft 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).

  • Force limiting device for a parking brake actuator arranged in series with a service brake actuator
    Patent number: 4036533
    Abstract: A force limiting device for a parking brake actuator is arranged in series with a service brake actuator to limit the maximum force of the two actuators to the maximum force from one of them. One actuator works from hydraulic pressure and the other from air pressure. Thus, an overflow valve controls the hydraulic pressure and is forced closed by an adjustable spring and open by either hydraulic pressure in a valve chamber or by air pressure exerted on a valve plunger. Both sides of the valve are maintained at the hydraulic pressure while the valve outlet is both closed or open.
    Type: Grant
    Filed: November 30, 1976
    Date of Patent: July 19, 1977
    Assignee: Svenska Aktiebolaget Bromsregulator
    Inventor: Uno Ingemar Kraft