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:
Dec. 30, 1997
Filed:
Jun. 03, 1996
Thomas L Tompkins, Woodbury, MN (US);
Ryan C Shirk, Mendota Heights, MN (US);
Steven C Schroeer, New Richmond, WI (US);
Richard P Merry, White Bear Lake, MN (US);
Troy K Ista, River Falls, WI (US);
Richard L Bloom, Woodville, WI (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
An efficient, light-weight airbag inflation filter includes a gas-permeable, substantially rigid support tube having a plurality of uniform perforations therethrough. A filtering element formed from a continuous inorganic ceramic yarn or roving is helically cross-wound around the support tube to form one or more layers covering the perforations of the support tube. A wire screen, having openings therethrough smaller than the perforations in the support tube, is disposed between the filtering element and the support tube to act as a gas diffusion layer for the gases passing through the inflation filter.