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:
Nov. 29, 2011
Filed:
Jul. 26, 2006
VU K. Nguyen, Brooklyn Park, MN (US);
David M. Behrens, Hopkins, MN (US);
Christopher M. Lange, New Brighton, MN (US);
Vu K. Nguyen, Brooklyn Park, MN (US);
David M. Behrens, Hopkins, MN (US);
Christopher M. Lange, New Brighton, MN (US);
Graco Minnesota Inc., Minneapolis, MN (US);
Abstract
An air operated pump () uses a magnet () mounted in the valve cup () of the air motor () and two reed sensors () mounted in the valve cover () to monitor the speed and position of the valve (). A solenoid () is mounted on the valve cover () and can be commanded to extend a plunger () into the valve cup () to stop valve movement and therefore the pump from running away. Three methods may be used to increase battery life and monitor the solenoid plunger position, two of which use the changing inductance of the solenoid () to monitor the solenoid movement.