UNT Libraries Government Documents Department - 2 Matching Results

Search Results

Pipe-Wrench.

Patent for the improvement of pipe wrenches necessary for use in well drilling or other circumstances where a wrench of strong construction is needed. This patent provides for a pipe wrench that can be easily adjusted to fit pipes of differing sizes and is easily manipulated for use regardless of direction.

Date: December 9, 1919

Creator: Carmichael, Robert E.

Item Type: Patent

Pump.

Patent for a new and improved design for pumps as they are used in deep wells. New design meant to prevent sand from entering machine between the working barrel and plunger.

Date: February 1, 1919