Music – Instruments – Drums
Reexamination Certificate
2000-05-15
2001-04-24
Hsieh, Shih-Yung (Department: 2837)
Music
Instruments
Drums
C084S41100A, C084S327000, C248S188000
Reexamination Certificate
active
06222107
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a floor tom free-suspension system. More particularly, the present invention relates to a floor tom free-suspension system which can receive a drum stably.
Referring to
FIG. 1
, a conventional floor tom free-suspension system has a drum main body
10
supported by three support rods
14
. Each of the support rods
14
has a foot end
18
and an upper end
15
passing through a through hole
13
of a positioning mount
12
. The positioning mount
12
has the through hole
13
receiving the respective support rod
14
and a threaded hole
16
receiving a butterfly bolt
17
. However, the butterfly bolt
17
cannot fasten the respective support rod
14
stably so that the respective support rod
14
will rotate freely.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a floor tom free-suspension system which can receive a drum stably.
Another object of the present invention is to provide a floor tom free-suspension system which has a plurality of U-shaped positioning plates to confine a plurality of support rods so that the support rods will not rotate freely.
Accordingly, a floor tom free-suspension system comprises a drum main body, three support rods, a counterhoop, an annular ring, a collar, a plurality of U-shaped positioning plates, a plurality of U-shaped pressing plates, and a plurality of butterfly bolts. The drum main body has a top head. A plurality of positioning fasteners are disposed on the drum main body. Each of the positioning fasteners has a threaded end. The counterhoop encloses an upper rim of the drum main body. Each of the support rods has a foot end, an upper end, and a plurality of periphery serrations. The collar has a plurality of periphery seats. Each of the periphery seats has a round aperture matching the respective positioning fastener. The annular ring has a plurality of inner wings matching the periphery seats. Each of the inner wings has an oblong hole. Each of the U-shaped positioning plates has a main plate and two lug plates. The main plate has a threaded aperture. Each of the lug plates has a round hole and a plurality of inner teeth. Each of the U-shaped pressing plates has a first arm, a second arm, and a through hole. Each of the butterfly bolts has a threaded portion. The collar encloses a lower rim of the drum main body. The annular ring encloses the collar. A plurality of elastic cushions each is disposed on the respective inner wing. Each of the positioning fasteners passes through the respective elastic cushion, the respective oblong hole of the inner wing, and the respective round aperture of the periphery seat. A plurality of nuts each engages with the respective threaded end of the positioning fastener. Each of the U-shaped positioning plates receives the annular ring. Each of the U-shaped pressing plates receives the respective main plate of the U-shaped positioning plates. The upper end of the support rod passes through the respective round hole of the lug plate. The inner teeth of the lug plate engages with the periphery serrations of the support rod. Each of the butterfly bolts passes through the respective through hole of the U-shaped pressing plates and the respective threaded aperture of the U-shaped positioning plate to fasten the U-shaped pressing plate and the U-shaped positioning plate together.
REFERENCES:
patent: 5088669 (1992-02-01), Zinnbauer
patent: 5454288 (1995-10-01), Hoshino
patent: 5998717 (1999-12-01), Chen
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