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:
Jan. 31, 2012
Filed:
Oct. 15, 2010
Applicants:
Alan Thomas, Wiltshire, GB;
Colin Gradwell, Wiltshire, GB;
Mark Hemmings, Wiltshire, GB;
Inventors:
Assignee:
Knorr-Bremse Rail Systems (UK) Ltd., Melksham, Wiltshire, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 51/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pressure equalization device adapted to be operatively connected to an enclosure, the device including an air passage which, when the device is so connected to the enclosure, provides a fluid communication between the interior of the enclosure and atmosphere, the air passage containing a barrier wall comprising an air permeable membrane forming a micro-particulate filter.