Patents by Inventor Wienfried Pfefferkorn

Wienfried Pfefferkorn 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).

  • Torsion damper comprising a clutch friction disc
    Patent number: 5450935
    Abstract: A torsion damper in the form of a clutch friction disc comprises two guide washers bearing first elastic members mounted with clearance in recesses in a wheel disc, and second elastic members interposed circumferentially between reaction plates and the wheel disc. Friction elements intervene between the guide washers and the plates. The second elastic members are fitted radially beneath the first elastic members while the friction elements axially urge the plates towards the wheel disc and comprise on one side of the wheel disc a first elastic washer and a first friction washer in contact with a reaction plate, and on the other side of the wheel disc, a second friction washer in contact with a reaction plate and a third friction washer engaging the first elastic members. The invention is particularly applicable to torsion damping friction discs for use in automobile clutches.
    Type: Grant
    Filed: August 26, 1993
    Date of Patent: September 19, 1995
    Assignee: Valeo
    Inventors: Paolo Rumignani, Wienfried Pfefferkorn