The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 1985
Filed:
Aug. 22, 1983
Masakatsu Kawahara, Amagasaki, JP;
Masaru Takeda, Kobe, JP;
Kobe Steel, Limited, Kobe, JP;
Abstract
A master/slave fluid-pressure apparatus having a first valve respective to angular movement of a master arm for producing fluid pressure which is applied as a pilot pressure to shift a closed-center three-position directional valve in one direction, which then allows a fluid-pressure actuator to be operated to cause a slave arm to follow the master arm in angular motion. The angular movement of the slave arm actuates a second valve coacting therewith to develop a fluid pressure which is applied as another pilot pressure to the directional valve. When the fluid pressure from the second valve reaches a predetermined point, the directional valve is shifted in the opposite direction to stop operation of the fluid-pressure actuator. The first and second valves may either be pressure reducing valves or relief valves.