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. 05, 1986
Filed:
Aug. 28, 1984
Melvin S Weinberg, Nashua, NH (US);
Alan D Cormier, Newburyport, MA (US);
Ronald L Jones, Newton, NH (US);
Amdev, Inc., Haverhill, MA (US);
Abstract
Apparatus and a process for reducing peristaltic pump noise in a high impedance electrochemical measuring system by eliminating the noise at the pump source so as to minimize the effect of the noise on the precision and the response time of the measuring electrode. In a system having a high impedance measuring electrode connected to the elastomeric peristaltic tubing via a fluid conduit, a high impedance segment is disposed in the fluid conduit between the electrode and peristaltic tubing and means are disposed between the segment and peristaltic tubing for discharging the electrical noise generated by the action of the pump rollers over the peristaltic tubing. Preferably the discharging means is a conductive path electrically connected to an AC capacitive ground wherein the impedance of the capacitive ground is less than that of the segment. The segment may be a nonconductive liquid or gas such as air.