Supports – Stand – Plural leg
Patent
1997-10-30
2000-12-19
King, Anita M.
Supports
Stand
Plural leg
248165, 182184, F16M 1124
Patent
active
061618071
ABSTRACT:
A portable, optically-stable stand, sized to fit over a bed or chair, such as a wheel chair, adapted to collapse with pivoting legs compactly folded parallel to a main beam, is configured to unfold with all support legs mutually diverging. On the main beam is removably attached a vertical post. Eye examination equipment is mounted height-adjustable to the vertical post with a sleeve sliding over the post, regulated with rack and gear. The main beam and legs are telescoping to enhance compactness. The legs are secured in an optically stable support position with leg proximal ends pivotably received in a slot with a slot flat end. With the pivoting legs diverging in said support position, a leg end terminating in an oblique, flat surface is leans in face-to-face contact against the slot flat end to limit further pivoting. In the primary embodiment, the legs unfold from a stored position in double-axis rotation, with first a vertical rotation of a bar in a tube attached to each end of the main beam followed by a vertical rotation of each leg, pivotably attached to the bar, in a plane generally transverse to the main beam. In an alternative embodiment, a bar is affixed transversely to each end of the main beam from which bar a leg pivotably unfolds from each end of the bar from its stored position to its support position in a single-axis rotation in a plane oblique to the main beam and bar and parallel the main beam.
REFERENCES:
patent: 2325592 (1943-08-01), Degler
patent: 2408247 (1946-09-01), Wekeman
patent: 2410330 (1946-10-01), Ashenfelter
patent: 2919094 (1959-12-01), Petrick
patent: 3091886 (1963-06-01), Nutting
patent: 5037053 (1991-08-01), Fox et al.
patent: 5102079 (1992-04-01), Lee
Breigenzer Nicholas
Steiner Michael
King Anita M.
Tingey David L.
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