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:
May. 23, 1995
Filed:
Jul. 18, 1994
Applicant:
Inventors:
Gloria D Bowen, Eagan, MN (US);
Zubin P Daruwala, Minneapolis, MN (US);
David W Hegdahl, Lino Lakes, MN (US);
Thomas J Scanlan, Woodbury, MN (US);
Jeffrey W McCutcheon, Eagan, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N / ;
U.S. Cl.
CPC ...
181230 ;
Abstract
The present invention relates to a pneumatic tool having superior sound muffling performance. The pneumatic tool has an exhaust port, wherein a sound muffling structure comprising a nonwoven web of fibers coated with a binder resin, is fitted in said exhaust port to seal said exhaust port, wherein said fibers have diameters of about 30 to about 100 microns and wherein the web has a compression resistance energy of about 0.09 to about 0.14 Joules.