Boots – shoes – and leggings
Patent
1982-09-08
1985-04-30
Smith, Jerry
Boots, shoes, and leggings
364513, 340685, 182 2, 248654, 173 43, E21C 1100, F16M 1300
Patent
active
045147965
ABSTRACT:
A method is set forth for controlling the orientation of an articulated boom of the type having a first portion and a second feed arm portion such that the first portion remains parallel to a predetermined position during movement of the articulated boom. The method utilizes a computer which senses the angular position of the various parts of the boom in a total of five directions and computes the required angular position of the feed arm to maintain it parallel to a set position as the boom is moved in any direction. Various hydraulic servovalves are utilized to control the flow of hydraulic fluid in a manner to maintain parallelism within 1/2.degree. with the referenced position.
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Saulters John D.
Scarr Roger H.
Augustin Raymond W.
Joy Manufacturing Company
MacDonald Allen
Smith Jerry
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