A - Human Necessities – 47 – B
Patent
A - Human Necessities
47
B
A47B 9/00 (2006.01) A47B 3/00 (2006.01)
Patent
CA 2346245
A height adjustable mechanism for supporting a work surface for vertical movement relative to a base includes a counterbalance mechanism for providing a force opposing a downward force tending to lower the work surface; a brake mechanism for releasably retaining the work surface in a desired vertical position; a user operated release mechanism for selectively releasing the brake mechanism to permit vertical movement of the work surface; and an interlock mechanism for preventing release of the brake mechanism if the force and the downward force are out of balance by some given extent. In the preferred construction, the interlock mechanism includes an interlock plate supported by the base for pivotal movement between first and second blocking positions when the force is less than and greater than the downward force, respectively, through a neutral position when the force essentially corresponds to the downward force, and the release mechanism engages with the interlock plate when in the blocking positions thereof to prevent release of the brake mechanism by a user.
La présente invention concerne un mécanisme réglable en hauteur (fig. 1) qui permet de soutenir une surface de travail (12), selon un mouvement vertical, par rapport à une base (14). Ce mécanisme comprend un mécanisme d'équilibrage (18), qui fournit une force s'opposant à une force dirigée vers le bas, qui tend à faire descendre la surface de travail (12), un mécanisme de freinage (20), qui permet de retenir la surface de travail (12), de manière libérable, dans la position verticale souhaitée, un mécanisme de libération commandé par utilisateur (50), qui permet, au choix, de libérer le mécanisme de freinage (20), afin de permettre un mouvement vertical de la surface de travail (12), ainsi qu'un mécanisme de verrouillage (52), qui empêche la libération du mécanisme de freinage (20), lorsque la force et la force dirigée vers le bas sont dans une certaine mesure en déséquilibre.
Carlson Holly M.
Hahn Christopher T.
Kerl Peter J.
Sith Ahmad
Finlayson & Singlehurst
Weber Knapp Company
LandOfFree
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