Hidden safety contoured leaf spring locking device

Details Hidden safety contoured leaf spring locking device Hidden safety contoured leaf spring locking device

1994-04-26

1994-10-25

Mai, Lanna

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 28, 135 40, A45B 2514

Patent

active

053579941

ABSTRACT:
The invention herein relates to a kind of hidden safety contoured leaf spring positioner device for umbrella structures that is comprised of a center pole, a sliding strut spreader, a handle connector, contoured leaf spring and other components, wherein the tensility of the contoured leaf spring is utilized to produce a special locking function and is installed in a round positioning hole of the positioning cavity inside the sliding strut spreader, thereby enabling an umbrella to be actively and safely locked when opened or closed.

REFERENCES:
patent: 1091895 (1914-03-01), Schaap
patent: 1113769 (1914-10-01), Fretz
patent: 3677274 (1972-07-01), Yasuda et al.
patent: 5020558 (1991-06-01), Huang
patent: 5232004 (1993-08-01), Wu

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