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:
Dec. 10, 2002
Filed:
Aug. 21, 2001
Masao Kajitani, Ibaraki, JP;
SMC Corporation, Tokyo, JP;
Abstract
A smooth exhaust valve includes a main flow path having a large cross-sectional area and an auxiliary flow path having a small cross-sectional area for connecting a first port and a second port in parallel, a main valve body for opening and closing the main flow path, an auxiliary valve body for opening and closing the auxiliary flow path, a first piston for opening and closing the main valve body, a second piston for opening and closing the auxiliary valve body, a first spring device for repulsing the main valve body in a valve-closing direction, a second spring device for repulsing the auxiliary valve body in a valve-closing direction, and an adjusting rod mounted to a valve casing so as to be operated from outside to move forward and rearward and for changing a compressed amount of the second spring device by operation of forward and rearward movements of the adjusting rod to adjust a repulsing force of the second spring device.