Patent ID: 7361823
Filing Date: 2008-04-22
Classification: G10D

Abstract:
1. A drum having a replaceable bearing edge comprising: a tubular drum shell having first and second ends and an integral, one piece annular shell wall extending between the ends, the shell wall having inside and outside wall surfaces, the shell wall being sufficiently thick and rigid to support a membrane tightening ring by fastener anchors attached to the shell wall; a first replaceable annular bearing member removably mounted on the first end of the shell, the bearing member having a membrane surface at an outer end that provides a membrane-support surface, the bearing member further having an annular shell surface at an inner end, the shell surface abutting and releasably fitting on the first end of the shell so as to be maintained in axial alignment therewith; a membrane that fits over the membrane surface, the membrane having an enlarged outer edge; a membrane tightening mechanism comprising an annular hoop that fits over the end of the shell and bearing member and engages the outer edge of the membrane, the hoop tightening the membrane on the bearing edge by means of adjustable fasteners that extend between the loop and anchors that are mounted on the shell.