Patent ID: 6043419
Filing Date: 2000-03-28
Classification: G10D

Abstract:
A drum comprising:a drum shell having an open end;a drum head having a skin extending over the open end of the shell and a circumferential head hoop lying outside the open end of the shell;a counter-hoop lying over the circumferential head hoop;a shell hoop fixed relative to and surrounding the shell in the vicinity of the open end; anda clamp ring surrounding the drum shell;and wherein the counter-hoop and the shell hoop each have a radially outwardly extending portion the respective outwardly extending portions being such that the counter-hoop portion is inclined away from the open end of the shell and the shell hoop portion is inclined towards the open end of the shell;the clamp ring being arranged to engage the two outwardly extending portions and being capable of radial expansion and contraction;the clamp ring including radially inwardly extending rails which are inclined in a way which corresponds to any inclination of the respective outwardly extending portion of the counter-hoop and shell hoop.