Patents by Inventor William S. Benjamin

William S. Benjamin 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).

  • Angled roller mop
    Patent number: 4516287
    Abstract: A roller mop having a wringer assembly connected to a handle and a cleaning element mounted in the wringer assembly for reciprocation through a pair of rollers in a direction that is transverse to the longitudinal axis of the handle. The cleaning element is reciprocated by a retraction rod that has upper and lower arms that are angled relative to one another. The lower arm is oriented to exert a pulling force upon the cleaning element that is directed at an angle relative to the axis of reciprocation. To counteract a nonproductive component of the exerted force that tends to bind the cleaning element, the lower arm is arranged to engage a bearing surface that in included on the wringer assembly.
    Type: Grant
    Filed: April 2, 1984
    Date of Patent: May 14, 1985
    Assignee: The Lighthouse for the Blind, Incorporated
    Inventors: Robert S. Johnson, Paul E. Fletcher, William S. Benjamin, John I. Zsitvay
  • Sponge mop
    Patent number: D280769
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: September 24, 1985
    Assignee: The Lighthouse for the Blind, Incorporated
    Inventors: Robert S. Johnson, Paul E. Fletcher, William S. Benjamin, John I. Zsitvay