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:
Nov. 21, 2000
Filed:
Sep. 18, 1998
Eivind Stenersen, River Falls, WI (US);
Wayne M Wagner, Apple Valley, MN (US);
Daniel T Risch, Burnsville, MN (US);
Donaldson Company, Inc., Minneapolis, MN (US);
Abstract
A process for installing a fiber wrap or a packing material in a tubular construction, for example a muffler assembly, includes a step of compressing a mat of packing material by removing at least a portion of air from the mat of packing material. The mat is oriented against a tubular wall. After the step of orienting the mat, a shell, such as a muffler shell, is oriented over and against the mat. The step of compressing a mat may include drawing a partial vacuum through a perforated tubular wall, where the perforated tubular wall is the tubular wall that the mat is oriented against. Alternatively, the step of compressing a mat may include drawing a partial vacuum through the perforated wand inserted into the mat. Apparatus for installing the packing material can include a mandrel, a pump apparatus, and a sealing arrangement; or, the apparatus can include a wand and a vacuum pump.