Supports – Stand – Tilting support surface
Patent
1994-08-16
1995-11-14
Chotkowski, Karen J.
Supports
Stand
Tilting support surface
2483491, 248921, F16M 1100
Patent
active
054659361
ABSTRACT:
A rotatable bracket includes a base plate and an upper plate rotatably engaged on the base plate. The base plate defines a hemispherical recess at substantially a central portion thereof. A boss is projected upward from substantially a center of the hemispherical recess. A post is extended upward from a center of the boss. A plurality of wings are radially extended from substantially a periphery of the boss thus defining a space between the wings and a surface of the hemispherical recess. The upper plate includes a hemispherical protrusion extended downward from a bottom side thereof thus simultaneously defining a convex surface and a concave surface at two opposite faces of the hemispherical protrusion. An elongated hole and a substantially square hole are defined in the upper plate and in communication with each other. The wings of the base plate are manually passed through the substantially square hole of the upper plate and are allowed to slide along two elongated plate portions defining the elongated hole, meanwhile the upper plate is permitted to be rotated with respect to the boss of the base plate.
REFERENCES:
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patent: 4365779 (1982-12-01), Bates et al.
patent: 4483503 (1984-11-01), Gahan
patent: 4554590 (1985-11-01), Chelin et al.
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patent: 4589713 (1986-05-01), Pfuhl et al.
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patent: 5024415 (1991-06-01), Purens
patent: 5102082 (1992-04-01), Bang
patent: 5145134 (1992-09-01), Hashimoto et al.
patent: 5398903 (1995-03-01), Cho
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