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:
Aug. 24, 2004
Filed:
Sep. 12, 2002
Kazutoshi Sakaki, Fujisawa, JP;
Sumitomo Heavy Industries, Ltd., Tokyo, JP;
Abstract
An air pressure actuator has a partition wall provided on one of a slider and a guide shaft to form two cylinder chambers between the guide shaft and the slider. Intake/exhaust systems are connected with the two cylinder chambers for supplying a compressed air into the cylinder chambers or discharging the same therefrom. Two servo valves including a large capacity servo valve and a small capacity servo valve are respectively connected with the intake/exhaust systems. A position detector for detecting the position of the slider is provided on the slider. A control device receives the detection results of the position detector and a position instruction value, to select the large capacity servo valve or the small capacity servo valve in accordance with an acceleration or deceleration zone and a constant speed zone of the slider, and to control an opening degree of a selected servo valve.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile