Patents by Inventor Gardner R. Williams

Gardner R. Williams 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).

  • Door operator
    Patent number: 3981203
    Abstract: A door operator includes a threadless drive shaft, a carriage mounting skewed rollers engaging the drive shaft to move the carriage along the shaft upon shaft rotation, a drive motor having a shaft coaxial with the threadless shaft and a helical coupling connecting the shafts together. The coupling comprising a plurality of closely spaced helical convolutions with the end of the coupling secured to the motor shaft and the drive shaft, respectively. The coupling includes means for decreasing the shear stresses imposed on the end portions of the convolutions.
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: September 21, 1976
    Assignee: The Stanley Works
    Inventor: Gardner R. Williams