Seat stem positioning structure of a chair for drummer

Details Seat stem positioning structure of a chair for drummer Seat stem positioning structure of a chair for drummer

1996-10-16

1998-04-14

Brown, Peter R.

Supports

Stand

Standard type

2484061, 2481884, 29734412, 297461, F16M 1126

Patent

active

057383260

ABSTRACT:
A seat stem positioning structure for a chair for drummer, including an internally threaded seat stem connector shaped like a stepped tube and fastened to a tubular central shaft and equipped with pivoted legs for supporting on the ground, a threaded seat stem having a screw section threaded into the seat stem connector to hold a seat for sitting, and a clamping device fastened to the seat stem connector and the threaded seat stem by fastening means to firmly secure them together, the clamping device including two hinged clamping plates having a respective connecting plate at the respective free end fastened to each other by a screw and a wing nut, and a respective downward locating rod forced into engagement with a respective locating notch in a step at the seat stem connector.

REFERENCES:
patent: 434743 (1890-08-01), Trapp
patent: 1723363 (1929-08-01), McArdle
patent: 1937892 (1933-12-01), Huntley
patent: 2412451 (1946-12-01), Foote
patent: 2508932 (1950-05-01), Turner
patent: 4366940 (1983-01-01), Vargas
patent: 4828212 (1989-05-01), Dicks

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