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:
Mar. 01, 2011
Filed:
Jun. 12, 2009
Chung-kai Wang, Taipei, TW;
Wen-an Huang, Taipei, TW;
Chao-min Yang, Taipei, TW;
Wei-hsun Hsu, Taipei, TW;
Chung-Kai Wang, Taipei, TW;
Wen-An Huang, Taipei, TW;
Chao-Min Yang, Taipei, TW;
Wei-Hsun Hsu, Taipei, TW;
Primax Electronics Ltd., Taipei, TW;
Abstract
A solenoid valve and an automatic document feeder using the solenoid valve are provided. The solenoid valve includes a valve body, a valve spindle, a spring, a ring-shaped groove and muffling ring. The ring-shaped groove is sheathed around the valve spindle. The muffling ring is disposed within the ring-shaped groove. When the valve body is magnetized to magnetically attract the valve spindle, the valve spindle is moved within the valve body, and the muffling ring collides with the recess inner wall, thereby reducing collision noise.