| 摘要 |
The dental stool has a base with casters permitting movement into desired operating position. The seat is supported by a hinged arm mounting for the seat column lower end, permitting free movement of the column axis in all directions in a horizontal plane. The column length is adjustable for placing the seat at desired height and the seat has a tilting adjustment with respect to the column, and may turn freely about the column axis. The forward edge of the seat is recessed for supporting the thighs to either side of the recess and rearwardly thereof. A horizontal ring cooperating with a rotatable wheel on the column limits the movement with respect to the base and a horizontal plate cooperates with an adjustable spring pressed pad at the bottom of the column to provide a slight frictional resistance to movement of the stool seat and column.
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