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Patent

Straight line mechanism

James Richard Halsall
TLDR
In this article, the conchoid type linkage mechanism was used to move functional elements of industrial manipulators in straight lines without the use of lead screws or revolute jointed arms.
Abstract: 
Linkage mechanisms for industrial manipulators are disclosed which are based on so-called straight line mechanisms. The preferred straight line mechanism is of the conchoid type. The linkage mechanisms may be employed to move functional elements of industrial manipulators in straight lines without the use of lead screws or revolute jointed arms.

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Patent

Aerodynamic drag reducing apparatus

Thomas S. Breidenbach
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Retractable aerodynamic structures for cargo bodies and methods of controlling positioning of the same

Andrew F. Smith, +5 more
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Rear-mounted aerodynamic structures for cargo bodies

Andrew F. Smith, +4 more
TL;DR: A rear-mounted aerodynamic structure for securing to a cargo body includes a three- or four-sided structure having a deployed position for assisting in improving aerodynamic efficiency of the cargo body as mentioned in this paper.