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:
Feb. 03, 2009
Filed:
Dec. 19, 2003
Applicant:
Axel Schubert, Berlin, DE;
Inventor:
Axel Schubert, Berlin, DE;
Assignee:
MSA Auer GmbH, , DE;
Primary Examiner:
Int. Cl.
CPC ...
A61M 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A direct current motor having a fixed stator coil module and a magnetic rotor that can be rotated around the perimeter of said module and forming an impeller at the same time. The coils, terminal and electric connecting lines as well as upstream motor control and voltage converter modules are embedded in a non-conductive casting compound. Power is supplied from an intrinsically safe accumulator or battery pack at a voltage that is still considered intrinsically safer using a higher current value to match the required motor output. The filter and blower unit can be used in zone '0' potentially explosive atmospheres.