Gloria D. Bowen - Eagan MN Zubin P. Daruwala - Minneapolis MN David W. Hegdahl - Lino Lakes MN Thomas J. Scanlan - Woodbury MN Jeffrey W. McCutcheon - Eagan MN
Assignee:
Minnesota Mining and Manufacturing Company - St. Paul MN
International Classification:
F01N 300
US Classification:
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.