Wind-proof umbrella rib structure

Details Wind-proof umbrella rib structure Wind-proof umbrella rib structure

2005-03-08

2005-03-08

Braun, Leslie A. (Department: 3632)

Tent, canopy, umbrella, or cane

Umbrella

Rib and stretcher joints

C135S025300, C135S025310, C135S031000

Reexamination Certificate

active

06863081

ABSTRACT:
A wind-proof umbrella rib structure comprises a main rib, a plurality of sub-ribs and an umbrella cloth. An annular upper nest is at a top of the main rib and a lower nest is at a middle section of the main rib. Each sub-rib includes an upper rib, a lower rib, a tension rib, a driven rib, a connecting rib; and a pivotal piece. Each pivotal piece has a first slot and a second slot. When one end of the lower rib is pivotally to a tension rib, a stud passes through the lower rib, the first slot and the tension rib so as to fix the lower rib. The second slot serves to connect the first and second driven means. The umbrella cloth includes a first cloth and a second cloth. The first and second cloths are overlapped. The overlapped portions are formed with gaps as flow guides.

REFERENCES:
patent: 4007752 (1977-02-01), Weber
patent: 6089244 (2000-07-01), Ko
patent: 6186157 (2001-02-01), Lin et al.
patent: 6244284 (2001-06-01), Wang
patent: 20020129843 (2002-09-01), Wang
patent: 20030005951 (2003-01-01), Wu
patent: 20030205264 (2003-11-01), Lin et al.

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