Horizontally supported planar surfaces – Plural related horizontal surfaces – Coplanar extension surface
Patent
1980-03-31
1982-08-17
Zugel, Francis K.
Horizontally supported planar surfaces
Plural related horizontal surfaces
Coplanar extension surface
108 86, A47B 100
Patent
active
043443699
ABSTRACT:
A table (10) includes an extensible top surface including end leaves (20, 22) which are slidably mounted on a frame (12). The end leaves (20, 22) are mounted by means of a roller mechanism (62, 66) which permits easy movement of the leaves between an opened and closed position to allow for insertion of a center leaf (28). The center leaf (28) is carried on the frame (12) and is displaceable between a down position below the top surface of the table and an up position wherein the center leaf forms a portion of the top surface. The leaf (28) is mounted to the table by means of a linkage (34, 46) which allows the center leaf (28) to be displaced between the up and down positions. In order to facilitate movement of the center leaf (28) to the up position, at least one torsion rod (40) or other spring element is mounted between the center leaf (28) and the table frame (12) to provide the desired biasing force to maintain the center leaf (28) in the up position.
REFERENCES:
patent: 551701 (1895-12-01), Watkins
patent: 726853 (1903-05-01), Borgmann
patent: 992066 (1911-05-01), Roberts
patent: 1143853 (1915-06-01), Olson
patent: 1208018 (1916-12-01), Rogginger
patent: 1861565 (1932-06-01), Hall
patent: 1985620 (1934-12-01), Raphael
patent: 2170098 (1939-08-01), Stephenson
patent: 2657108 (1953-10-01), Lallier
patent: 3080066 (1963-03-01), Berridge et al.
patent: 3099232 (1963-07-01), Cooper
patent: 3813073 (1974-05-01), Mohr et al.
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