Tent – canopy – umbrella – or cane – Umbrella – Self-opening and closing
Reexamination Certificate
1999-12-03
2001-03-20
Canfield, Robert (Department: 3635)
Tent, canopy, umbrella, or cane
Umbrella
Self-opening and closing
C135S098000
Reexamination Certificate
active
06202660
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field of the Invention
This invention relates to an upright shade for use as a sunshade, garden shade or market stand shade etc.. The stand has a central upright tube with a shade structure and cloth as the roof awning, which is stretched out over the roof struts when the shade is opened.
2. Description of the Prior Art
66
Prior art garden, sun and market stand shades already exist in a variety of embodiments. One especially highly developed shade is disclosed in PCT/DE92/00155. It comprises three crowns, namely an end crown, which forms the tip of the shade, and moves upwards when the shade is shut, a vertically fixed crown, which is securely mounted on the upright tube and serves to coordinate the closing and opening movements of the shade structure, and a runner crown to which the shade struts are joined, and which can move up and down the upright tube. Disposed between the roof struts and the fixed crown there are further auxiliary struts which are also designed to play a coordinating role as the shade opens and closes. During the opening movement, the two mobile crowns move towards each other, i.e. the end crown moves downwards, and the runner crown upwards, whilst the roof struts are simultaneously forced outwards, thereby opening the shade awning. Conversely, when the shade is closed, the end crown moves upwards and the runner crown downwards, and the roof struts are swung downwards. This mechanical arrangement offers kinetic advantages, because the opened shade is not opened so high above the ground as it would be if its end crown were mounted in a stationary fashion at the end of an upright tube. The construction reaches the limits of feasibility, however, when it has to be used for especially large shades, or when easy of operation is a priority. With large shades, the effort required to operate them is too great. There is a growing demand for large shades, however, and users also want them to be easy to operate, i.e. with little expenditure of effort.
SUMMARY OF THE INVENTION
Hence the task of this invention is to provide an upright shade of this type which can be opened and closed with little expenditure of effort.
This task is solved by an upright shade with an upright tube, a shade structure made up of roof struts which are joined to a mobile end crown disposed at the top end of push tube which can be longitudinally displaced inside the upright tube; there are also supporting struts which are joined at their top ends to the roof struts in order to provide support, and at their bottom ends to a runner crown which can be displaced along the upright tube, as well as auxiliary struts to coordinate the opening and closing movement of the roof struts and supporting struts, said auxiliary struts being articulated, and arranged between a stationary crown disposed at the top end of the upright tube and the supporting struts, with this upright shade being characterized in that a steel or pneumatic spring is fitted inside the upright tube for partially automatic opening and closing of the shade in that the end crown can be moved partially automatically—i.e. with little expenditure of effort, by displacing one roof strut—into its lowest position, thereby opening the shade, or into its uppermost position, thereby closing the shade.
REFERENCES:
patent: 2705967 (1955-04-01), Zimmermann et al.
patent: 2906277 (1959-09-01), Militano
patent: 3008478 (1961-11-01), Foltis et al.
patent: 3073327 (1963-01-01), Foltis et al.
patent: 4747422 (1988-05-01), Chung
patent: 4823821 (1989-04-01), Day
patent: 4928718 (1990-05-01), Apple
patent: 5483985 (1996-01-01), Yu
patent: 187643 (1956-01-01), None
patent: 2236149 (1974-02-01), None
patent: 195 19 034 (1996-05-01), None
patent: 0200571 (1986-11-01), None
patent: 0392989 (1990-10-01), None
patent: 2238448 (1974-02-01), None
patent: 1167472 (1969-10-01), None
patent: 9215218 (1992-09-01), None
Canfield Robert
Schindler Edwin D.
LandOfFree
Upright shade does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Upright shade, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Upright shade will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2508129