Patent ID: 7845464
Filing Date: 2010-12-07
Classification: B25D,Y10S

Abstract:
1. A noise-abatement device, comprising: a housing having a first end wall, a second end wall, an outlet in the second end wall, and a body extending between the first end wall and the second end wall, the housing defining an expansion chamber, the expansion chamber having a longitudinal axis extending along the length thereof; a port outlet extending through the body into the expansion chamber, the port outlet being oriented transverse to the longitudinal axis of the expansion chamber; and at least one tube located at least partially within the expansion chamber, the tube having a perforated portion and a non-perforated portion, wherein the length of the perforated portion is greater than the length of the non-perforated portion, and wherein the non-perforated portion extends from the second end wall, past the port outlet, toward the first end wall, and wherein at least a portion of the perforated portion is located within the expansion chamber.