Stock material or miscellaneous articles – Collapsible article
Patent
1987-03-30
1989-03-28
Epstein, Henry F.
Stock material or miscellaneous articles
Collapsible article
160136, 160160, 403 53, E06B 906
Patent
active
048163104
ABSTRACT:
A collapsible structure is provided comprising pairs of parallel posts interconnected by pairs of expansion link-like connecting rods. Connecting rods of each pair have their centers pivotably connected, wherein their outer ends are pivotably connected with the corresponding posts and wherein at least one outer end of each rod is slideable along the corresponding post. The pairs of parallel posts can be superimposed while corresponding posts are at their meeting ends hingedly connected for a zig-zag-like or an accordion-like collapsability in the vertical plane. Further pairs of parallel posts can be laterally positioned while adjoining posts of adjoining pairs of posts are hingedly connected for a substantial change in the angle enclosed by the planes extending through said pairs of posts.
REFERENCES:
patent: 320974 (1885-06-01), Schreiber
patent: 352660 (1886-11-01), Pitt
patent: 583235 (1897-05-01), McCormick
patent: 942545 (1909-12-01), Colidge
patent: 1095238 (1914-05-01), Shadduck
patent: 1251213 (1917-12-01), Fritz
patent: 2459024 (1949-01-01), Gipson
patent: 2493810 (1950-01-01), Gipson
patent: 2988837 (1961-06-01), Hutton
patent: 3885616 (1975-05-01), Berkowitz
patent: 4606394 (1986-08-01), Bannister
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