A - Human Necessities – 47 – B
Patent
A - Human Necessities
47
B
A47B 21/02 (2006.01) A47B 21/03 (2006.01) F16M 11/04 (2006.01)
Patent
CA 2246073
A mechanism for supporting an auxiliary surface for vertical movement relative to a primary surface includes a pair of link elements having opposites ends pivotally connected to auxiliary and primary surface mounting elements or brackets, a first bias for opposing downwardly directed swinging movement of the link elements relative to the primary surface mounting element, a second bias for opposing pivotal downwardly directed movement of the auxiliary surface mounting element relative to the link elements, and a locking mechanism for releasably constraining swinging movement of the link elements and pivotal movement of the auxiliary surface mounting element. The locking mechanism features a roller and an operator arranged to engage with the roller when moved into a locking position to effect clamping together of the link elements and the auxiliary surface supporting element.
Finlayson & Singlehurst
Weber Knapp Company
LandOfFree
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