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:
Jun. 02, 2020
Filed:
Feb. 25, 2019
Applicant:
Graco Minnesota Inc., Minneapolis, MN (US);
Inventors:
Andrew Nelson, Brooklyn Park, MN (US);
Dennis Dingmann, Blaine, MN (US);
Mike Flander, Elk River, MN (US);
James C. Schroeder, Ramsey, MN (US);
Peter Thomassen, Kinrooi, BE;
Assignee:
Graco Minnesota Inc., Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E01C 23/22 (2006.01); B05B 9/04 (2006.01); B05B 13/00 (2006.01); F04B 7/00 (2006.01); F04B 7/02 (2006.01); F04B 15/02 (2006.01); F04B 23/02 (2006.01); F04B 23/06 (2006.01); F04B 5/02 (2006.01); F04B 53/12 (2006.01); F04B 53/10 (2006.01); F04B 13/02 (2006.01);
U.S. Cl.
CPC ...
E01C 23/222 (2013.01); B05B 9/0413 (2013.01); B05B 13/005 (2013.01); E01C 23/22 (2013.01); F04B 5/02 (2013.01); F04B 7/0003 (2013.01); F04B 7/0266 (2013.01); F04B 13/02 (2013.01); F04B 15/02 (2013.01); F04B 23/025 (2013.01); F04B 23/06 (2013.01); F04B 53/1005 (2013.01); F04B 53/126 (2013.01);
Abstract
A pump for a striping machine includes dual check valves within its piston. At least one of the dual check valves is closed during an upstroke of the piston, thereby ensuring that the pump drives fluid during both its upstroke and its downstroke to maintain a desired ratio between a fluid output by the pump and a material solution output by another pump of the striping machine.