Folding collapsible frame assembly for an automatic folding umbr

Details Folding collapsible frame assembly for an automatic folding umbr Folding collapsible frame assembly for an automatic folding umbr

1993-08-09

1994-05-10

Friedman, Carl D.

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 24, A45B 2514

Patent

active

053099320

ABSTRACT:
A folding collapsible frame assembly for an automatic folding umbrella, which includes a lower shaft, an upper shaft made to slide in the upper shaft, a collapse control spring, a lock ring moved to lock the collapse control spring in the compressed condition as the umbrella is opened, a stretch control spring controlled by a bottom spring on the handle of the umbrella to automatically push the umbrella into the open condition, a guide control mechanism controlled by a control bottom on the handle of the umbrella to release the lock ring from the collapse control spring for allowing the umbrella to be collapsed automatically.

REFERENCES:
patent: 1091895 (1914-03-01), Schaap
patent: 3687146 (1972-08-01), Seitel
patent: 3856030 (1974-12-01), Sato
patent: 4534374 (1985-08-01), Day
patent: 4989625 (1991-02-01), Wu
patent: 5058613 (1991-10-01), Su et al.
patent: 5144969 (1992-09-01), Chan et al.
patent: 5232004 (1993-08-01), Wu

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