Patent ID: 9251771
Filing Date: 2016-02-02
CPC Classification: G10G

Claim Text:
1. A clamping device for mounting to a music instrument stand comprising a stand bar for supporting a music instrument, the clamping device comprising an elbow joint mountable to the stand bar for coupling the music instrument to the stand bar, the elbow joint having opposite ends comprising clamping seats mounted thereto respectively and comprising retention plates, which are respectively coupled to the clamping seats through pivotally-connected bars attached to the clamping seats, wherein the clamping seats are each formed with a clamping cavity that is formed by recessing a central portion of a surface of the clamping seat to form a spherical trough located between upper and lower edge portions of the clamping seat, adapted to receive and securely hold, in combination with the retention plates, a spherical object therein and wherein the upper and lower edge portions of each of the clamping seats is provided with a V-shaped trough-edge opening in the form of a V-shaped notch comprising inclined straight faces that are inclined inwardly with respect to the surface of the clamping seat, the V-shaped notches of the upper and lower edge portions being substantially aligned with each other and adapted to selectively receive and clamp, in combination with the retention plate, a straight member therein; wherein the clamping seats of the two ends of the elbow joint are identical to each other so that the two clamping seats are usable interchangeably.