Horizontal swivelling angle positioning means for a chair
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 6, 2001
Grant Date -
N/A
app pub date -
Oct 19, 1999
filing date -
Apr 30, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Horizontal swivelling angle positioning device for a chair is disclosed. The structure consists of an axle bush with a positioning ring having a plurality of positioning slots formed radially thereof being attached to a main frame of the chair. An axle is inserted in the axle bush and sustained thereon so as to integrally engage the main frame and the chair seat. A control lever is provided to interconnect two flanks formed on the axle and sandwiches a filler block therebetween. The filler block is further locked to the control lever by a set screw so that the two components are integrally combined to turn together. A spring disposed between a stationary substrate of the chair seat and a protruded tooth of the filler block. The protruded tooth is used to be inserted into one of the positioning slots and clogged thereof by the spring so as to keep the chair in a predetermined horizontal swivelling angle. According to particular requirement of the user, the control lever may be removed to and set at a desired direction. The operation can be performed by the user who sits in a wheelchair by slightly bending down his/her head to turn the control lever without getting off the wheelchair.
First Claim
Family
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Cited Art Landscape
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