Music – Instruments – Drums
Reexamination Certificate
2001-12-17
2003-07-15
Hsieh, Shih-Yung (Department: 2837)
Music
Instruments
Drums
Reexamination Certificate
active
06593517
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a drum. More particularly, the present invention relates to a drum which has a positioning hoop having an inner curved flange.
Referring to
FIGS. 1 and 1A
, a conventional drum comprises a shell
10
′, a pair of batter heads
12
′ disposed on two sides of the shell
10
′, a pair of collars
11
′ enclosing the batter heads
12
′ and surrounding the shell
10
′, a pair of positioning rings
13
′ surrounding the collars
11
′, a large number of connection seats
20
′ disposed on the shell
10
′, a large number of positioning mounts
21
′ disposed on the positioning rings
13
′, and a large number of bolts
14
′ fastening the connection seats
20
′ and the positioning mounts
21
′ together. The relative positions of the shell
10
′ and the corresponding collar
11
′ should be adjusted manually. If a user does not watch the relative positions of the shell
10
′ and the corresponding collar
11
′ precisely while adjusting, the period of usage of the drum will be shortened because of the deviation of the relative positions. If the positioning ring
13
′ does not surround the corresponding collar
11
′ evenly, the batter head
12
′ cannot be tightened.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a drum which has a positioning hoop having an inner curved flange in order to press a collar on a shell.
Accordingly, a drum comprises a shell, a pair of batter heads disposed on two sides of the shell, a pair of collars enclosing the batter heads and surrounding the shell, a pair of positioning hoops surrounding the collars, a large number of connection seats disposed on the shell, a large number of positioning mounts disposed on the positioning hoops, and a large number of positioning fasteners fastening the connection seats and the positioning mounts together. Each of the positioning hoops has an inner curved flange to press the corresponding collar on the shell.
REFERENCES:
patent: 887016 (1908-05-01), Poland
patent: 1590754 (1926-06-01), Hulbert
patent: 6362408 (2002-03-01), Chang
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