Patents by Inventor Raymond Needham

Raymond Needham 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).

  • Mining equipment
    Patent number: 4358161
    Abstract: A spiral vane shearer disc capable of manufacture by simpler techniques than those currently employed as an outer end of a drum, around the external periphery of which is welded a helical vane, provided at one end with a tire, the latter having a plurality of preformed, spaced apart, blind pockets, each adapted to receive a pick box. This construction eases the welding operation while gives improved transmission of loading from the picks to the disc.
    Type: Grant
    Filed: February 9, 1979
    Date of Patent: November 9, 1982
    Assignee: Mining Supplies Limited
    Inventor: Raymond Needham