Patent ID: 7781659
Filing Date: 2010-08-24
Classification: G10D

Abstract:
1. An adjustable modular drum, comprising: a first shell, which is a hollow cylinder with a first end and a second end, wherein the first shell has several lugs placed around the outer circumference, and each lug has a screw hole at one end thereof; plural second shells of different heights, each of which has a ring shape with a first end and a second end, and the first end is superimposed on the second end of the first shell; two drumheads, respectively hooped on the first end of the first shell and the second ends of the second shells; a hoop, surrounding the outer circumference of one of the second shells for tightly hooping the drumhead of one of the second shells, and having plural through holes mounted around the outer circumference thereof; and plural tension rods of different lengths, which respectively correspond to the heights of the second shells superimposed on the first shell and are passed through the through holes around the outer circumference of the hoop on one of the second shells and locked in the screw holes of the lugs.