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:
Aug. 19, 2014
Filed:
Sep. 25, 2007
Timothy Sidlyarevich, Rogers, MN (US);
James Campbell, Plymouth, MN (US);
John A. Metza, Eagan, MN (US);
Timothy Sidlyarevich, Rogers, MN (US);
James Campbell, Plymouth, MN (US);
John A. Metza, Eagan, MN (US);
Graco Minnesota Inc., Minneapolis, MN (US);
Abstract
A two (or more) piston pump system () is provided with both pumps () being crank () driven. The system does not have a mechanical camshaft, but a software algorithm, which acts like one in controller (). The algorithm will LEARN and create a unique speed profile, which will mimic the mechanical camshaft. For practical purposes the speed profile of output gear is called Cam profile with software acting as an imaginary camshaft. The algorithm utilizes Crank Angle Estimation, Learn Curve Generation, Smoothing and Advance Timing Calculation.