Knockdown structure

Details Knockdown structure Knockdown structure

1980-06-23

1982-11-02

McCall, James T.

Horizontally supported planar surfaces

Folding

With vertical adjustability

108159, 312257R, 312264, A47B 300

Patent

active

043567770

ABSTRACT:
A knockdown structure including at least two panels adapted to extend transverse to each other, an intermediate bar segment attached to a side face of one of the panels and two end bar segments attached to side face of the other of the panels and disposed at opposite ends of the intermediate bar segment. The intermediate and end bar segments have end faces in abutting relation when the bar segments are in alignment and the abutting end face on the intermediate and end bar segments define supplementary angles extending oblique to both of the panels at angles such that the intermediate bar segment forms a wedge type interlock with the end bar segments.

REFERENCES:
patent: 181320 (1876-08-01), Donnell
patent: 325696 (1885-09-01), Post
patent: 353382 (1886-11-01), Schmidt
patent: 408278 (1889-08-01), White
patent: 1659101 (1928-02-01), Harvey
patent: 1954242 (1934-04-01), Heppenstall
patent: 2340545 (1944-02-01), Marsh
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patent: 2801895 (1957-08-01), Gass
patent: 2914118 (1959-11-01), Sawyers
patent: 3012678 (1961-12-01), Fiege
patent: 3269068 (1966-08-01), King
patent: 3295902 (1967-01-01), Doutt
patent: 3326149 (1967-06-01), Mitchell et al.

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