Patents by Inventor Leif Westgren

Leif Westgren 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).

  • Device in a force actuator
    Patent number: 5231887
    Abstract: A reciprocating axial movement of a drive member (18) in a force actuator is generated by a prestressed tool (17) of Terfenol material being exposed to a pulsating magnetic field. The reciprocating movement is transformed to an axial movement in an application direction of a push rod (21) coaxial therewith. The drive member and the push rod are connected by a connection member (22), which is in self-locking thread engagement with a drive member and the push road and is subjected to a torque from a spiral spring (23) for its rotation during the idle stroke of the reciprocating movement in the direction for advancing the push rod in the application direction.
    Type: Grant
    Filed: July 23, 1992
    Date of Patent: August 3, 1993
    Assignee: SAB Wabco Holdings B.V.
    Inventors: Thomas Arvidsson, Leif Westgren