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:
Sep. 17, 2013
Filed:
Jul. 06, 2005
Applicants:
Jose DE Corral, Grafton, MA (US);
Stanley P. Pensak, Jr., East Walpole, MA (US);
Inventors:
Jose de Corral, Grafton, MA (US);
Stanley P. Pensak, Jr., East Walpole, MA (US);
Assignee:
Waters Technologies Corporation, Milford, MA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 49/06 (2006.01); F04B 49/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A feedback control loop for a high pressure pump modifies the accumulator velocity and pressure during solvent transfer. The accumulator velocity is adjusted to maintain the system pressure equal to the expected pressure to thereby eliminate the effect of the flow deficit created by a thermal effect.