Patents by Inventor Thorolf R. Bjorksten

Thorolf R. Bjorksten 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).

  • Vehicle control system with conditional transmission-brake interlock
    Patent number: 4273224
    Abstract: In a vehicle (12, 12a) having interlock means (39, 39a) for maintaining the vehicle transmission (16, 16a) in neutral if powered travel is attempted while the parking brake (29, 29a) is engaged, interlock control means (51, 51a) are provided for inactivating the interlock once the vehicle is undergoing powered travel. If it becomes necessary to use the parking brake to stop motion of the vehicle, the retarding action of the engine (13, 13a) is effective, through the still engaged transmission, to supplement such emergency use of the parking brake.
    Type: Grant
    Filed: October 11, 1978
    Date of Patent: June 16, 1981
    Assignee: Towmotor Corporation
    Inventors: Vaikai K. Brown, Thorolf R. Bjorksten, Llewellyn L. Walter