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:
Oct. 29, 2013
Filed:
Oct. 30, 2003
Martin P. Mccormick, Forest Lake, MN (US);
William A. Weikel, Maple Grove, MN (US);
Bret A. Deneson, Maple Grove, MN (US);
David M. Larsen, Albertville, MN (US);
Martin P. McCormick, Forest Lake, MN (US);
William A. Weikel, Maple Grove, MN (US);
Bret A. Deneson, Maple Grove, MN (US);
David M. Larsen, Albertville, MN (US);
Graco Minnesota Inc., Minneapolis, MN (US);
Abstract
The proportioner () has a variable speed controlled DC motor () having a gearbox () and crankshaft () at either end which are connected to reciprocating piston pumps (). The outputs () of the two pumps () are fed to a manifold () where the pressure of each output is measured. The user sets a setpoint pressure (e.g. 1000 psi) and the controller () then compares the pressures of the two components and controls the higher of the two relative to the setpoint. Ratio assurance is monitored by continuing to look at both output pressures. If one side falls below a predetermined percentage of the setpoint (50% in the preferred embodiment), an alarm may be raised or operation stopped.