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US 4,226,391 AGranted
Chair support
OwnerHenry B. Keultjesinventor
Life of this patent
Estimating the term…
Abstract
A chair support bracket formed from a dished plate having an opening therethrough in the center of the dished portion formed by a sleeve that is ring welded to the plate. The opening through the sleeve has a locking taper with the large diameter of the taper at its lower end to lock onto the tapered upper end of a pedestal. Unlocking of the support bracket from the pedestal is accomplished by vibration waves proceeding from the plate back down into the sleeve to impinge upon the locking tapered surface of the sleeve.
Claims2
A support for fixing the seat of a chair to the top of a spindle having a locking taper thereon, said support comprising:
- a plate the center portion of which is dished downwardly below a peripheral portion extending around its side edges, said peripheral portion extending around its side edges, said peripheral portion providing a bearing surface to receive a chair seat, said center portion having a hole therethrough, a stiff sleeve the top end of which extends through said hole with the opening through said sleeve being positioned generally perpendicularly to said peripheral side edge portion of said plate, said opening of said sleeve having a taper that opens downwardly for locking engagement with the top end of a spindle, and said sleeve being of a thicker material than that of said plate, a continuous vibration transmitting ring weld between said sleeve and said plate, and whereby a sharp lateral blow on said sleeve produces vibration from the sleeve into said plate and back to the sleeve to help unlock the sleeve from a spindle received therein.
Dependencies are inferred from the claim text.