Horizontally supported planar surfaces – Vertically adjustable – By telescoping
Reexamination Certificate
2007-01-30
2007-01-30
Chen, José V. (Department: 3637)
Horizontally supported planar surfaces
Vertically adjustable
By telescoping
C108S147110
Reexamination Certificate
active
10997851
ABSTRACT:
An elevation adjustment device in the legs of table includes a rectangular leaf and four legs connected to the underside of four corners of the leaf. The legs each has a first tube and second tube slidably inserted into the first tube having graduation on outer periphery, a tubular sleeve engaged with the lower end of the first tube, a tubular stopper with a circular pad pressed into the lower end of the second tube, a pushing rod connected to a threaded shank inserted into a circular through hole of the first tube and a protrudent radial through hole in a segmental retaining bar, an enlarged retaining ring, a washer and a spring sequentially wrapped on the threaded shank and secured by a internally threaded cap from the inner end of the shank.
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patent: 6923410 (2005-08-01), Chang
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