| 摘要 |
A chair control mechanism is disclosed which includes a base plate suitable for mounting a chair seat, the base plate having a pair of spaced apart flanges projecting downwardly from the seat mounting surface, a bracket having two opposite sides and a bottom portion, the sides pivotally mounted to the flanges of the base plate, the bottom of the bracket adapted for accepting a pneumatic cylinder, a pair of aligned orifices are located one in each of the bracket sides for accepting opposite ends of a lever, the lever having a cam thereon, the pneumatic cylinder having an actuator valve extending into the bracket such that the lever cam actuates against the valve, the additional orifices located on the bracket sides such that the lever is free to slidably engage said base plate flange to prohibit pivotal movement of the chair seat.
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