Patents by Inventor Christopher Redgrave

Christopher Redgrave 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: 5507083
    Abstract: A generally straight elongated lever tool is insertable through the notch between the ribs in the end of a heavy duty truck brake shoe. A notch in the end of the tool engages the wire between the coils of the return spring when the tool is inserted between the shoe ribs at the end of the shoe. The tool is fulcrummed about the end of the brake actuating S-cam or roller for stretching the spring. One side of the notched end of the tool is concave or cupped to contact one of the spring coils for direct axial lift or stretch to cause the spring end hook to snap over an anchor pin up installation. The opposite side of the notched end of the tool surface is inclined for spring removal such that upon reversed insertion of the tool with the inclined surface against the spring coil and fulcrumming about the S-cam or roller, the coil is deflected laterally upon stretching of the spring to cause the end hook to clear the anchor pin upon relaxation of the spring.
    Type: Grant
    Filed: August 31, 1992
    Date of Patent: April 16, 1996
    Assignee: Eaton Corporation
    Inventors: Christopher Redgrave, Jay White