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:
Apr. 17, 1984
Filed:
Dec. 03, 1981
Applicant:
Inventor:
Alistair L Carnegie, Yeovil, GB;
Assignee:
Normalair-Garrett (Holdings) Limited, Yeovil, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A62B / ;
U.S. Cl.
CPC ...
12820127 ; 12820524 ; 12820128 ; 137 812 ;
Abstract
A deep diving breathing system in which a breathable gas mixture is circulated through a diving helmet by a push-pull pump includes an inlet flow control valve, an outlet gas flow regulator valve, and a bleed valve. The bleed valve operates in response to the pressure of gas flowing from the outlet gas flow regulator valve to bleed gas from a gas supply line upstream of the inlet flow control valve. The system facilitates diving operations from a diving bell at a range of depths and recovery of helium in a helium-oxygen breathing gas mixture.