Patents by Inventor Howard Slack

Howard Slack 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: 4214653
    Abstract: A dual clutch has the usual driving member, two pressure plates and two driven plates frictionally engaged between a pressure plate and the driving member. The clutch also has a conventional cover member. The spring arrangement for providing a clamp load on the driven members between the driving members and the pressure plates is made up of two separate springs. One spring is a diaphragm spring, complete with inwardly extending release fingers, which act between the cover member and the main or first pressure plate. The second spring is a belleville spring which is less strong than the first mentioned spring, and acts between the two pressure plates to provide the clamp load for the second pressure plate but reduce the clamp load for the main pressure plate.
    Type: Grant
    Filed: October 25, 1978
    Date of Patent: July 29, 1980
    Assignee: GKN Transmissions Ltd.
    Inventor: Howard Slack