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Combination Set-Collar for Well-Strainers.
Patent for a combination set-collar for well-strainers that combines a back pressure valve and a washer pipe which allows for the cleaning of the strainer.
Date:
November 25, 1919
Creator:
Thompson, Alexander
System:
The Portal to Texas History
Valve Structure for Oil-Wells.
Patent for Valve Oil-Wells. This improved Valve Oil Well will increase efficiency and durability of device.
Date:
September 19, 1919
Creator:
McEvoy, John Philip
System:
The Portal to Texas History
Machine for Cleaning Pipe-Lines
Patent for a machine for cleaning pipe-lines. The machine uses the pipeline as a track, traveling along the track cleaning the pipeline.
Date:
July 1, 1919
Creator:
Kinzbach, Frank
System:
The Portal to Texas History