Garden umbrella with upper and lower support ribs

Details Garden umbrella with upper and lower support ribs Garden umbrella with upper and lower support ribs

1998-03-25

1998-11-17

Mai, Lanna

Tent, canopy, umbrella, or cane

Umbrella

Collapsible in length

135 29, 135 31, A45B 1912

Patent

active

058363289

ABSTRACT:
A garden umbrella includes upper and lower support ribs, a runner sleeved slidably on a pole, stretchers, and connecting rods pivotally interconnecting upper and lower support ribs. Each stretcher has one end pivotally attached to a runner and an opposite end pivotally attached to the corresponding upper and lower support ribs. As such, the pivotal attachments described above constitute a pantograph structure, thereby facilitating convenient stretching and collapsing operations.

REFERENCES:
patent: 829858 (1906-08-01), Eaton
patent: 1206667 (1916-11-01), Carlson
patent: 1824192 (1931-09-01), Bouma
patent: 1839309 (1932-01-01), Gundel
patent: 3853136 (1974-12-01), Schwartzenberg
patent: 5329953 (1994-07-01), Becher
patent: 5472006 (1995-12-01), Kuo et al.
patent: 5482069 (1996-01-01), Lee

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