Tent – canopy – umbrella – or cane – Umbrella – Collapsible in length
Reexamination Certificate
2000-02-23
2001-10-16
Friedman, Carl D. (Department: 3635)
Tent, canopy, umbrella, or cane
Umbrella
Collapsible in length
C135S015100, C135S033200
Reexamination Certificate
active
06302124
ABSTRACT:
EXAMPLE OF THE PRIOR ART
The '571patent, namely, U.S. Pat. No. 3,680,571 issued for “Umbrella Folding Assembly” to Jack W. Houston on Aug. 1, 1972 exemplifies an operating mode that is not in popular use, wherein the support of the umbrella cover contemplates ascending component movement to be closed and reverse, i.e., descending movement, to be opened. As known by common experience, most umbrellas open by urging a slide on the umbrella vertical support in ascending movement, and urging the slide in descending movement to close the umbrella. Thus the conditions of the umbrella cover are just the reverse as between the umbrellas in popular use and the umbrella exemplified by the '571 patent.
In the umbrella of the '571 patent the full beneficial potential of its operating mode is not realized. In this, and in all other known patents employing the described operating mode, and in particular the descending movement to open the umbrella, the descending movement is achieved under spring urgency. That is, the referred to spring is compressed during ascending movement and in the compressed condition causes the descending movement. Thus, during ascending movement to close the umbrella, a force is required to compress the return spring. Also, the umbrella construction must include provision for the return spring. In the umbrella according to the present invention, the use of a return spring is effectively dispensed with.
Broadly, it is an object of the present invention to provide a patio sun umbrella and method of use thereof which overcomes the foregoing and other shortcomings of the prior art.
More particularly, the opening, of the umbrella is, as noted, of a descending nature and thus is allowed to occur primarily only under the weight of the top of the umbrella, i.e., without return springs or the like, thereby greatly simplifying the construction and use of the umbrella.
REFERENCES:
patent: 3680571 (1972-08-01), Houston
patent: 6058952 (2000-05-01), Lin et al.
patent: 4004189-C1 (1991-04-01), None
Friedman Carl D.
Myon Amer, P.C.
Slack N.
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