Patents by Inventor Curtis W. Rollwitz

Curtis W. Rollwitz 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).

  • Rod stand
    Patent number: 4467871
    Abstract: A pump jack of a well is stopped when the polished rod clamp is elevated above the wellhead. A rod stand is secured around the polished rod encircling it. The rod stand is between the clamp and the wellhead top. The pump jack is lowered and then stopped when the clamp rests on the rod stand. After the well is serviced, the pump jack is raised and then stopped when the clamp is elevated above the rod stand. The rod stand is removed from the polished rod and the pump jack is started for normal operation. The rod stand is in the form of a pipe with a thick washer on each end, which has been split and hinged together.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: August 28, 1984
    Inventor: Curtis W. Rollwitz