UNT Libraries Government Documents Department - 10 Matching Results

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Pipe-Wrench.

Description: Patent for a pipe wrench that can be "operated in either direction" (line 18) to screw and unscrew a pipe with an easy application and secure grip.
Date: April 27, 1920
Creator: Nixon, Jeddy D.
Item Type: Refine your search to only Patent

Pump

Description: Patent for an improvement on the design of pumps used in the oil industry. This uses a combination of water, sand, grits, and other sediments for deep wells.
Date: April 23, 1920
Creator: Scott, Floyd L.
Item Type: Refine your search to only Patent

Pump.

Description: Patent for a pump specifically designed for oil wells to make drilling oil more efficient, lucrative, and easier to perform.
Date: April 13, 1920
Creator: Carden, David A.
Item Type: Refine your search to only Patent

Testing Device.

Description: Patent for a testing device that can be used to test the condition of the pistons in an internal combustion motor. The device can also be used as an "air pump, or grease or oil gun." (lines 30-31).
Date: April 13, 1920
Creator: Harpst, Frederick E.
Item Type: Refine your search to only Patent

Well-Packer.

Description: Patent for an improved well drilling device called a "packer", in which this version has a reduced likelihood of the seals between separate parts being damaged and needing replacement.
Date: April 13, 1920
Creator: Fletcher, Harold W.
Item Type: Refine your search to only Patent
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