Drum and head diaphragm adjustor for drum

Details Drum and head diaphragm adjustor for drum Drum and head diaphragm adjustor for drum

2005-11-08

2005-11-08

Lockett, Kimberly (Department: 2837)

Music

Instruments

Drums

C084S41100A

Reexamination Certificate

active

06963022

ABSTRACT:
A head diaphragm adjustor for adjusting tension applied to upper and lower head diaphragms of a drum. A first bolt adjusts the tension applied to the upper head diaphragm. A second bolt adjusts the tension applied to the lower head diaphragm. A first meshed portion and a second meshed portion are respectively meshed with the first bolt and the second bolt and fixed to the shell. The upper portion of a rod is inserted in the first bolt in a manner independently rotatable relative to the first bolt. The lower portion of the rod is connected to the second bolt in a manner slidable relative to the second bolt and rotated integrally with the second bolt. The rod includes a cylindrical portion having a diameter greater than that of the upper portion of the rod. The first bolt abuts against the cylindrical portion.

REFERENCES:
patent: 2172578 (1939-09-01), Gladstone
patent: 2564933 (1951-08-01), Somerville
patent: 6417432 (2002-07-01), Downing
patent: 6747199 (2004-06-01), Shah

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