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:
Jul. 25, 2023
Filed:
May. 20, 2020
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Albert F. Zwolinsky, Skelmersdale, GB;
Richard D. Marshall, Skelmersdale, GB;
Christopher G. Hall, Skelmersdale, GB;
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A62B 9/00 (2006.01); A62B 18/00 (2006.01); A61M 16/00 (2006.01); A61M 16/06 (2006.01); A61M 16/10 (2006.01); A62B 18/02 (2006.01); A62B 9/04 (2006.01); A61M 16/08 (2006.01); A62B 7/02 (2006.01); A62B 7/10 (2006.01); A62B 18/08 (2006.01);
U.S. Cl.
CPC ...
A62B 9/006 (2013.01); A61M 16/0051 (2013.01); A61M 16/0066 (2013.01); A61M 16/024 (2017.08); A61M 16/06 (2013.01); A61M 16/0875 (2013.01); A61M 16/105 (2013.01); A62B 7/02 (2013.01); A62B 7/10 (2013.01); A62B 9/04 (2013.01); A62B 18/006 (2013.01); A62B 18/02 (2013.01); A62B 18/088 (2013.01);
Abstract
A safety breathing apparatus has a sensor for measuring the difference in pressure between two pointin the gas delivered to a head unit. The sensor is used to measure the difference in the pressure of the gas supplied through the apparatus between the two points in the gas flow, and the pressure difference is then used to calculate the gas flow rate.