Umbrella folding and unfolding device

Details Umbrella folding and unfolding device Umbrella folding and unfolding device

1996-05-21

1997-04-01

Mai, Lanna

Tent, canopy, umbrella, or cane

Umbrella

Runners and notches

135 38, 135 41, A45B 2506

Patent

active

056156987

ABSTRACT:
An umbrella frame shaft assembly includes a hollow shaft, a spring piece fastened in the upper segment of the shaft, a runner fitted slidably over the shaft, and a sleeve fastened with the runner. The spring piece has an upper retaining projection and a lower retaining projection. The runner has two retaining holes. The sleeve is provided in the inner wall thereof with two retaining recesses. When the umbrella is being unfolded, the runner is moved upwards along the shaft by the sleeve such that the upper and the lower retaining projections of the spring piece are located by the retraining holes of the runner and engaged with the retaining recesses of the sleeve. When the umbrella is being folded, the upper and the lower retaining projections of the spring piece are forced by the sleeve into the hollow interior of the shaft to allow the runner to be moved downwards by the sleeve.

REFERENCES:
patent: 1434942 (1922-11-01), Brandt
patent: 2567284 (1951-09-01), Hacken et al.
patent: 2822815 (1958-02-01), Bremshey
patent: 3424180 (1969-01-01), Andolfi
patent: 3856032 (1974-12-01), Schafer
patent: 4951695 (1990-08-01), Yang
patent: 5020558 (1991-06-01), Huang
patent: 5357994 (1994-10-01), Chung

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