Supports – Brackets – On extensible column mounted between opposed surfaces
Reexamination Certificate
2005-02-08
2005-02-08
Ramirez, Ramon O (Department: 3632)
Supports
Brackets
On extensible column mounted between opposed surfaces
Reexamination Certificate
active
06851652
ABSTRACT:
A telescopic support includes a tube and an elongated element inserted in the tube and formed with a series of ratchets. A driving and locking device includes a locking element, a spring and a driving element. The locking element includes a jaw formed with at least one ratchet and being pivotally installed on the tube. The spring is provided between the tube and the locking element for biasing the ratchet of the locking element into engagement with the ratchets of the elongated element. The driving element includes a jaw formed with at least one ratchet. The driving element can be pivoted on the tube in a direction so as to engage the ratchet thereof with the ratchets of the elongated element. The driving element can be pivoted in an opposite direction so as to disengage the ratchet thereof from the ratchets of the elongated element and pivot the locking element for disengaging the ratchet of the locking element from the ratchets of the elongated element.
REFERENCES:
patent: RE5094 (1872-10-01), Mathewson
patent: 3875822 (1975-04-01), Erith et al.
patent: 4281820 (1981-08-01), Martin
patent: 5572908 (1996-11-01), Bruder
patent: 5787761 (1998-08-01), Wang
patent: 6152434 (2000-11-01), Gluck
patent: 6547684 (2003-04-01), Kurohata
patent: 20030173475 (2003-09-01), Hsieh
patent: 19541745 (1997-05-01), None
patent: 2-20459 (1990-01-01), None
Kamrath Alan D.
Nikolai & Mersereau , P.A.
Ramirez Ramon O
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