Internal hinge

Details Internal hinge Internal hinge

1977-06-14

1978-05-16

Feldbaum, Ronald

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Sash balances

Spring

16139, 182165, 403116, E05D 900, E05D 1500, E05D 1110

Patent

active

040890848

ABSTRACT:
An internal hinge for use with first and second members such as the front and back legs of ladders in which there is a generally tubular means having a first portion adapted to be inserted into an aperture in the first member and a second portion adapted to be inserted into a second aperture in the second member. The apertures are aligned and adjacent one another and in the first portion there are two peripheral slots opposite one another through which a rigid pin passes, the ends of the pin being fastened to the first member. The second portion has two aligned transverse apertures through which a second pin is passed from outside the second member. Other embodiments include detented slot means for allowing selected angular positions of the legs, non-round tubular means, three-pin versions allowing two members to pivot with respect to a third, etc. Other embodiments include plant stands, easels, saw-horses, collapsible tables and collapsible seats.

REFERENCES:
patent: 204191 (1878-05-01), Brady
patent: 2604011 (1952-07-01), Cohen
patent: 2646037 (1953-07-01), Cook et al.
patent: 3401951 (1968-09-01), Bloom
patent: 3554294 (1971-01-01), Morkoski
patent: 3616469 (1971-11-01), Injeski

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