Patents by Inventor Arthur Gustaf Ahlstone

Arthur Gustaf Ahlstone 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).

  • Open head foster-style back-up tong
    Patent number: 5823074
    Abstract: An open-head Foster style backup tong has a number of pivoting jaws in mesh with a ring gear. A gap in the ring gear admits tubing into the center of the ring gear, where the tubing is gripped by the jaws when the ring gear is turned. The tong housing is open sided for convenient access and maintenance, and the removable jaws are indexed for easy installation.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: October 20, 1998
    Assignee: Oil Country Manufacturing, Inc.
    Inventor: Arthur Gustaf Ahlstone