Gravity return hinge having an axle rod in an axle sleeve

Details Gravity return hinge having an axle rod in an axle sleeve Gravity return hinge having an axle rod in an axle sleeve

1981-06-03

1983-07-05

Bell, Paul A.

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

Hinge

Gravitating hinge having vertical axis

16316, 49239, E05F 104

Patent

active

043910203

ABSTRACT:
An automatic return hinge having a primary and a secondary hinge, the primary hinge being furnished with an axle rod with spiral grooves, three locating balls in an axle sleeve roll along the spiral grooves on the axle rod as the door is opened and closed.

REFERENCES:
patent: 952211 (1910-03-01), Perego
patent: 1374437 (1921-04-01), Coombs
patent: 4200957 (1980-05-01), Hsu
patent: 4259763 (1981-04-01), Hsu

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