Gloria J Bowen

US Patent:

54183391, May 23, 1995

Filed:

Jul 18, 1994

Appl. No.:

8/276771

Inventors:

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.