Device for controlling the height of a swivel chair
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United States of America Patent
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-
Apr 16, 2002
Grant Date -
N/A
app pub date -
Aug 5, 1998
filing date -
Aug 23, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a height-controlling device of a swivel chair. An objective of this invention is to prevent the detachment of components which are fitted to the end of a piston rod of a cylinder, resulting in the improvement of work conditions. The height-controlling device of the present invention is comprised of an elastic body 620, bearing supports 42 and 44, and a ball bearing 50 which are fitted to the end of a piston rod 610 of a cylinder 12; and a retaining washer 1 which is fixed to the piston rod and prevents the detachment of the elastic body, the bearing supports and the ball bearing component from the piston rod. Alternatively, the height-controlling device of the present invention is comprised of an elastic body 620 and a bearing support 42 which are fitted to the end of a piston rod 610 of a cylinder 12; and a thrust bearing 500 which is fixed to the piston rod and functions as both the bearing support 44 and the ball bearing component 50. In order to prevent the detachment of the elastic body, the bearing support and the thrust bearing, the thrust bearing 500 includes extending portions 7 on the inner circumference thereof. The thrust bearing is fixed to the piston rod by the extending portions.
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