Patents by Inventor David H. Crisman

David H. Crisman 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: 5437297
    Abstract: An improved crank handle assembly for a shade umbrella suitable for patio or beach use, which has a bolt and a crank formed as a unitary member where the head of the bolt is insert molded into the hub of the crank in its manufacture. An annular spacer is mounted on each end of the bolt. An end of the bolt has a reduced threaded portion, which receives a washer and a nut, and the main body of the bolt forms a shoulder adjacent to the threaded portion. The washer abuts against the shoulder and one of the spacers at one end of the bolt. Tightening of the nut causes the washer to bottom out against the shoulder, and the annular spacers to abut against the umbrella pole applying a predetermined amount of compressive force to the crank handle assembly and the umbrella pole.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: August 1, 1995
    Assignee: Sunbeam Corporation
    Inventors: David H. Crisman, Glen D. Kemnitz