Horizontally supported planar surfaces – Folding – With vertical adjustability
Patent
1980-06-13
1982-05-04
Zugel, Francis K.
Horizontally supported planar surfaces
Folding
With vertical adjustability
108 99, A47B 300
Patent
active
043276504
ABSTRACT:
A mobile folding stage having a pair of stage surface members (10, 11), main support legs interconnected to form a base frame (12), and outer support legs (14, 15). Casters (70-73) are connected to caster beams (60-63) which are pivotally mounted to a caster frame (45) secured to the main support legs. Actuator links (86, 87) connect from the caster beams to the stage surface members to cause extension of the casters when the stage is brought to its horizontal, operable position, and to retract the casters when the stage is folded to its storage position. Outer leg control links (120) are positioned with respect to the outer leg to provide an over center resistance force which holds the stage surface members in their folded position. In the preferred embodiment, elevational adjustment is achieved through auxiliary support legs (130, 131), and the caster beams (60, 61) are shaped and positioned, together with stop members (141, 142) to position and secure the auxiliary legs in their fully extended position.
REFERENCES:
patent: 2764460 (1956-09-01), Nelson
patent: 2913294 (1959-11-01), Linde
patent: 2978754 (1961-04-01), Wilson
patent: 3351029 (1967-11-01), Bue
patent: 4054096 (1977-10-01), Wilson et al.
patent: 4067266 (1978-01-01), Lafargue
patent: 4074636 (1978-02-01), Wilson
Sico Incorporated
Zugel Francis K.
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