Umbrella frame system

Details Umbrella frame system Umbrella frame system

1989-12-29

1991-09-24

Raduazo, Henry E.

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 37, 135 38, A45B 2512

Patent

active

050506277

ABSTRACT:
This invention relates to a springless umbrella capable of being opened and closed under the elasticity of the ribs, which simplifies the manufactured and assembled process of the shaft and reduces the cost and provides a convenient umbrella for use.

REFERENCES:
patent: 636936 (1899-11-01), Worring
patent: 855142 (1907-05-01), Steininger
patent: 923130 (1909-06-01), Beaudry
patent: 1140801 (1915-05-01), Cohic
patent: 1247159 (1917-11-01), Schlesinger
patent: 3732881 (1973-05-01), Hirai

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