UNT Libraries Government Documents Department - 6 Matching Results

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Rotary Plowshare

Description: Patent for rotary plowshare that allows for improvements in plows. This detachable element rotates as it moves within the earth, pulverizing and disintegrating it while doing so. This rotary plowshare will accelerate cultivation and provide cost savings in time and labor.
Date: August 30, 1921
Creator: Billingsley, Rennie E.
Item Type: Refine your search to only Patent

Pressure-Screw.

Description: Patent for a pressure screw where the screw can freely rotate, and the shoe may pivot slightly. It is also designed for easy maintenance and lubrication of the bearing and to be cheap to manufacture, efficient and durable.
Date: August 16, 1921
Creator: Menger, Edward W.
Item Type: Refine your search to only Patent
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