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US 8,496,295 B2Granted
Rotary elbow with double shaft
OwnerChao-Ken Cheninventor
Life of this patent
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Abstract
A chair elbow capable of rotating with double shaft is disclosed. Two bearings are disposed on a mount board fixed on a chair. Each of the bearings connects one end of each of two rotating plates, while the other ends thereof are pivotally connected in a linear slot of a seat plate used for securing an armrest. The length of the slot is longer than the distance between the two bearings, and the latter is longer than the length of the rotating plates. Thus, the armrest on the seat plate can rotate against the mount board with 360 degrees and move forward and backward.
Claims10
A rotary elbow of chair comprising:
- a mount board;
- two bearings, each having a first pivot seat and a second pivot seat axially aligning with each other, and the two first pivot seats being separately fixed at two ends of the mount board;
- two rotating plates, one end of each of which fixedly connects one of the second pivot seats;
- and
- a seat board having a linear slot, two pivot shafts penetrating the slot to pivotally connect the other end of each of the rotating plates;
- thereby the rotating plates can rotate on the mount board about the bearings.
3 more elements
Dependencies are inferred from the claim text.