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:
Oct. 14, 2014
Filed:
May. 31, 2012
James P. Barrett, Liberty Lake, WA (US);
James P. Barrett, Liberty Lake, WA (US);
Venture Corporation Limited, Singapore, SG;
Abstract
An intrinsically safe, self-contained toxic gas removal and air conditioning system for use in an underground mine environment to continuously remove from air sealed in the chamber the COand/or CO from exhalations of up to thirty adult occupants. The system includes an explosion-proof/fire-proof shell strong enough to withstand a 15 psi explosion outside the survival chamber in which the air-scrubbing system is installed. In the event of normal power loss, the system runs on an internal battery capable of 96+ hours of continuous operation while incapable of creating an explosion hazard. A fan motor mounted inside the external shell is driven by a fan driver circuit and is coupled to a driveshaft extending outside the external shell to drive an air scrubber fan. A fan driver/controller circuit powers the fan and detects the loss of externally-provided AC power to automatically start operation when such power loss is detected.