Patents by Inventor Roger A. Chalk

Roger A. Chalk 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).

  • Method of manufacturing a motor element of an electric motor
    Patent number: 5040285
    Abstract: A method of manufacturing an electric motor stator (31) and rotor (43) including holding magnetic elements (29, 32, 53) thereof in position in dies and injecting a plastics material into the dies to provide bearing carrier mountings in the stator substantially concentric with pole faces (33) of the stator and poles of the rotor, providing a bearing (21) in the stator bearing carrier (27), mounting a shaft (13) in the bearing (21), with the shaft running in a further bearing mounting tube (6), and mounting the hub (51) of the rotor onto the shaft (13) so that operation of the motor drives the shaft. The motor and drive so made is mounted to drive an agitation and spin tub of a laundry machine.
    Type: Grant
    Filed: September 26, 1989
    Date of Patent: August 20, 1991
    Assignee: Fisher & Paykel Limited
    Inventors: John J. A. Williams, Frank W. Shacklock, Keith D. Ferguson, Roger A. Chalk