Tent – canopy – umbrella – or cane – Umbrella – Mechanically operated
Patent
1992-10-27
1995-02-07
Mai, Lanna
Tent, canopy, umbrella, or cane
Umbrella
Mechanically operated
135 251, A45B 1300
Patent
active
053868420
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to an umbrella, in particular a large umbrella, garden umbrella, stand umbrella and the like, having an umbrella pole, a pole part which is displaceable telescopically in the umbrella pole and on which roof rods are articulated by means of a crown, and having supporting struts between a runner, displaceable along the umbrella pole, and the roof rods, as well as having a roof covering. The displaceable pole part is in connection with a threaded spindle, mounted in the umbrella pole, and the runner is connected to the pole part by means of a flexible drawing element led over a deflection roller.
Such an umbrella is described, for example, in U.S. Pat. No. 4,424,824. In the case of such a configuration of the umbrella, it is possible to be able to displace the pole part, which is slidingly mounted in the umbrella pole and bears the roof rods, by exerting a small force, and thereby forcibly raise the runner and, by means of the supporting struts, bring the roof rods into the open position and, in this position, support them. The movements of the pole part and of the runner are opposite each other. For opening the umbrella, the pole part is lowered by means of the threaded spindle, whereas the runner is raised by the flexible drawing element. For closing the umbrella, the telescopic pole part is moved upward, whereas the runner slides downward on the umbrella pole. The displacing of the runner downward takes place by the dead weight of the same and by the proportionate weight of the supporting struts and of the roof rods. The manual actuating mechanism is preferably used for umbrellas of which the span is 4 to 8 m in diameter. What is essential here is that an umbrella is obtained of which the umbrella roof can be tensioned extremely tautly when the umbrella is opened.
U.S. Pat. No. 3,870,062 discloses an umbrella which has a roof skin tensioned in the manner of a pagoda and is provided with an upper crown. The latter is rigidly connected to the displaceable pole part, the roof rods being telescopic.
SUMMARY OF THE INVENTION
The object of the invention is to develop an umbrella of said type further in such a way that an umbrella is obtained of which the umbrella roof runs more or less concavely from the umbrella tip to the roof rod ends, so that a kind of pagoda shape is produced. In this case it is important that the umbrella roof is under tension from the umbrella tip to the roof rod ends.
The invention is distinguished by the fact that a further crown, displaceable along the pole part, is provided as upper crown, on which the roof covering, fastened to the roof rod ends, is attached, that the upper crown has stay crutches, the lower ends of which are guided by a common guide part along the pole part and that an annular rest is provided on the umbrella pole as support for the guide part.
Such a design of the umbrella of the type described at the beginning achieves the effect that, by simple means, an umbrella is obtained which, as a kind of pagoda, has an umbrella roof which is under considerable tension, without any folds, the pagoda umbrella having a high stability mechanically and aerodynamically. The umbrella receives an intrinsic rigidity and an intrinsic stability, without additional pretensioning forces having to be introduced. A completely equal tensioning of the umbrella covering is attained with the normal tensioning of the umbrella roof. The means for this are constructionally simple. Just a few additional parts suffice. As in the case of a normal umbrella of this type, the opening and closing of the umbrella can be easily carried out.
According to the further features of the invention, upper crowns [sic], stay crutches and guide part form a rigid, stable composite part. The stay crutches may be led through bores and the like at the roof rod crown, so that a physical hindrance cannot occur during opening and closing of the umbrella.
The annular rest is expediently arranged at the upper end of the umbrella pole. This rest can be given receiving e
REFERENCES:
patent: 2819725 (1958-01-01), Deisenroth et al.
patent: 3150671 (1964-09-01), Frey
patent: 3870062 (1974-04-01), Medlin
patent: 4319600 (1982-03-01), Roche
patent: 4424824 (1984-01-01), Becher
patent: 4637415 (1987-01-01), Dalo et al.
Becher Textil- und Stahlbau GmbH
Mai Lanna
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