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. 04, 2017
Filed:
Apr. 25, 2012
Mark L. Bauck, Coon Rapids, MN (US);
Zaixing You, Suzhou Jiangsu, CN;
Xueshui Wu, Suzhou Jiangsu, CN;
Clinton Craig Grandahl, Jr., Wilson, WI (US);
Mark L. Bauck, Coon Rapids, MN (US);
Zaixing You, Suzhou Jiangsu, CN;
Xueshui Wu, Suzhou Jiangsu, CN;
Clinton Craig Grandahl, Jr., Wilson, WI (US);
Graco Minnesota Inc., Minneapolis, MN (US);
Abstract
A reciprocating pump comprises a cylinder, an inlet check valve, a piston, an outlet check valve and a purge circuit. The cylinder has a first end and a second end. The inlet check valve is disposed proximate a first end of the cylinder. The piston is disposed within the cylinder between the inlet check valve and the second end. The outlet check valve is disposed within the piston. The purge circuit extends across the inlet check valve and the outlet check valve to fluidly couple the first end and the second end.