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:
Dec. 11, 2001
Filed:
Jul. 29, 1999
Mark Serafin, Apple Valley, MN (US);
LeRoy C. Erickson, Blaine, MN (US);
Imation.Corp., Oakdale, MN (US);
Abstract
A check valve system and method control the opening and closure of a check valve that supplies product fluid to an intensifier pump based on the position of a piston within the intensifier pump. Position sensing allows anticipation of different events along the path traveled by the piston, such as the start and end of advance, retract, and precompression cycles. The system and method operate to selectively open and close associated check valves based on the sensed position to carefully control the delivery of fluid to each intensifier pump. Active control of the check valves based on piston position allows more precise timing of fluid delivery in relation to the piston cycles. Anticipation of the onset of piston advance and retraction cycles can improve valve response time, providing more uniform fluid pressure for a continuous, steady, high pressure flow of fluid with minimal pressure fluctuation.