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:
Mar. 01, 2016
Filed:
Mar. 25, 2013
Hospira, Inc., Lake Forest, IL (US);
James D Jacobson, Lindenhurst, IL (US);
Brian Barclay, Pleasant Prairie, WI (US);
Ryan R Brumund, Libertyville, IL (US);
Steven T Cho, Chandler, AZ (US);
Hrishikesh Choudhury, Gurnee, IL (US);
Marwan A Fathallah, Mundelein, IL (US);
Tom Johnson, Gurnee, IL (US);
Patrick B Keely, Tacoma, WA (US);
Mohammad M Khair, Streamwood, IL (US);
Michael G Lowery, Wildwood, IL (US);
Frank Walsworth, Grayslake, IL (US);
John S Ziegler, Arlington Heights, IL (US);
HOSPIRA, INC., Lake Forest, IL (US);
Abstract
A differential pressure based flow sensor assembly and method of using the same to determine the rate of fluid flow in a fluid system. The sensor assembly comprises a disposable portion and a reusable portion. A flow restricting element is positioned along a fluid flow passage between an inlet and an outlet. The disposable portion further has an upstream fluid pressure membrane and a downstream fluid pressure membrane. The reusable portion has an upstream fluid pressure sensor and a downstream fluid pressure sensor. The upstream fluid pressure sensor senses the upstream fluid pressure at a location within the fluid flow passage between the inlet and the flow restricting element. The downstream fluid pressure sensor senses the downstream fluid pressure at a location within the fluid flow passage between the flow restricting element and the outlet. The process utilizes output of the sensors to calculate the flow rate of the fluid.