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:
Nov. 30, 2004
Filed:
Sep. 20, 2002
Timothy P. Ross, Kannapolis, NC (US);
Robbie L. Cecil, High Point, NC (US);
Rimcraft Technologies, Inc., Kannapolis, NC (US);
Abstract
A master/slave pump assembly employs a dual diaphragm pump as the master pump. An abrasive fluid, such as a resin containing abrasive particles, can be pumped by the dual diaphragm pump without the damage that would result from exposure of seals to the abrasive fluid. The slave pump, which can pump a catalyst or other secondary fluid, is driven in response to movement of the diaphragms and the shaft connecting the two diaphragms. A force or a signal dependent upon the actual mass flow rate of the primary fluid, can be communicated hydraulically or electrically to the slave pump, regardless of viscosity or environmental factors. An adjustable linkage is employed to alter the ratio of the mass flow rates of the two fluids.