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. 25, 2014
Filed:
Jan. 19, 2007
Applicants:
William R. Kennedy, Taylorville, IL (US);
John M. Kennedy, Taylorville, IL (US);
Inventors:
William R. Kennedy, Taylorville, IL (US);
John M. Kennedy, Taylorville, IL (US);
Assignee:
Kennedy Metal Products & Buildings, Inc., Taylorville, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21F 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A mine refuge for use in a mine includes a chamber sized and shaped for occupancy by at least one miner and adapted to be substantially sealed. An oxygen supply is installed in the chamber for supplying oxygen to the chamber. A breathable air supply is installed in the chamber for supplying a steady flow of breathable air and for positively pressurizing the chamber to inhibit entry of contaminated mine air into the chamber.