Percussion amplitude adjustable pedal drum-beating device

Details Percussion amplitude adjustable pedal drum-beating device Percussion amplitude adjustable pedal drum-beating device

2000-04-20

2001-04-24

Donels, Jeffrey (Department: 2837)

Music

Instruments

Drum and cymbal beaters

Reexamination Certificate

active

06222108

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates generally to a pedal drum-beating device, more particularly, it relates to a percussion amplitude adjustable pedal drum-beating device, in which a flywheel can be certainly and rapidly locked on a rotation shaft.
A percussion drum, among other musical instruments, is used to provide more distinct beats in performance of a concert. A conventional pedal drum-beater shown in
FIG. 1
is provided with a rotation shaft, whereon a drum-beater and an interactive flywheel device are arranged; and a drive chain wound on the flywheel device is coupled to a free end of a pedal with its one end so that a drum is stricken by tramping the pedal drum-beater via the drive chain and the flywheel device. The flywheel device composed of a flywheel and two clutch pieces is locked on the rotation shaft by two fixing studs (shown in FIG.
2
), and a positioning ferrule is inserted between those two clutch pieces and the rotation shaft. However, a percussion amplitude adjustable structure formed as abovesaid may cause occasional race rotation attributable to the loose clamp of the clutch pieces onto the positioning ferrule because of its slippery outer face.
In view of abovesaid defect, this invention is proposed with an improved design for clamping a flywheel firmly to a rotation shaft by pivotally jointing tail end of a main body and a clutch piece together and locking the other end with a single fixing stud, and forming a row teeth on a positioning ferrule to create beats positively and reliably.
SUMMARY OF THE INVENTION
The primary object of this invention is to clamp a flywheel firmly on a rotation shaft.
Another object of this invention is to clamp a clutch piece firmly on a positioning ferrule for prevention of any slip phenomenon between the positioning ferrule and the rotation shaft.
In order to realize the abovesaid objects, a flywheel comprising a main body and a clutch piece is pivotally disposed on a rotation shaft, wherein the tail end of the main body and the clutch piece are pivotally jointed while their other ends are kept open. A fixing stud is used to lock the main body and the clutch piece to form a unified assembly, and a positioning ferrule is disposed in-between the main body and the clutch piece. Moreover, a row of teeth is formed on the positioning ferrule, which is provided with an axial open channel at its one end. By proper assembly of foregoing components of this invention, a lever structure is formed to realize a rapid and dependable attachment on the rotation shaft and without slipping.
A detailed description of this invention together with further advantages or features thereof, at least an example of a preferred embodiment thereof will be described below with reference to the annexed drawings.


REFERENCES:
patent: 5343792 (1994-09-01), Liao
patent: 5398584 (1995-03-01), Liao
patent: 5421234 (1995-06-01), Liao
patent: 5714701 (1998-02-01), Hsieh

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