Tent – canopy – umbrella – or cane – Umbrella – Nonsymmetrical – axially offset – or inclined canopy
Patent
1996-08-19
1998-07-28
Mai, Lanna
Tent, canopy, umbrella, or cane
Umbrella
Nonsymmetrical, axially offset, or inclined canopy
135 203, 135 21, A45B 1100
Patent
active
057850690
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention concerns a standing umbrella with a stand having a mast on which the inner end of an outwardly and inwardly movable carrier beam is guided, the beam carrying the umbrella stick of a collapsible umbrella at its outer end and being held by means of a connecting strut linkedly arranged between the carrier beam and the upper end of the mast, and a drive mechanism for shifting the inner end of the carrier beam as well as for opening and closing the umbrella.
BACKGROUND OF THE INVENTION
A standing umbrella of the above-mentioned type is, for example, known from EP-PS 0 387 965. In the standing umbrella of that patent, the inner end of an outwardly and inwardly movable carrier beam is guided in the interior of the mast through an elongated slot and is connected with a drive mechanism consisting of a circulating member driven by means of a hand crank drive. A tension member, for example a cable, which at its inner end facing the mast is rigidly connected with the mast, serves to open the umbrella. From the mast, the tension element runs to and through the hollow carrier beam to the outer end of the beam, where the tension element is bent toward an upper hollow umbrella stick. The tension member is at its outer end connected with a further lower umbrella stick to the lower end of which support struts are pivotally connected, which struts in turn are pivotally connected with roof rods, which rods are pivotally connected to a crown located in the upper area of the upper umbrella stick. Upon outward extension of the carrier beam by sliding upwardly its inner end, the tension member is automatically drawn rearwardly relative to the mast whereby the lower umbrella stick portion is moved telescopically into the upper umbrella stick portion and the umbrella is opened. The lower umbrella stick portion then arrives at a pivotal connection between the upper umbrella stick and the carrier beam in the region above the crown, and locks this pivotal connection.
In this standing umbrella, there exists the disadvantage that the mast is weakened by the elongated guide slot, so that its bending and torsional rigidities are reduced, so that on one hand there exists the danger of a breakage of the mast and on the other hand, the danger of contortion when loaded by winds. Moreover, the tension member for opening and closing the umbrella lies freely accessible on the outside of the mast so that it is exposed to the danger of damage. Also, an inclined positioning of the umbrella by adjustment of the carrier beam is not possible since for opening of the umbrella the carrier beam must always be fully extended.
SUMMARY OF THE INVENTION
The object of the invention is to further improve a standing umbrella of the above-mentioned kind.
The object of the invention is solved by having the mast of the standing umbrella include two guide tracks spaced from one another by a spacing and so profiled that the guide elements which move along said tracks are held against movement perpendicularly to the sliding direction. By the two spaced and profiled guide tracks for the guide elements on the inner end of the carrier beam, the transverse sturdiness of the carrier beam relative to the mast is improved so that the carrier beam and with it the standing umbrella are made more resistant to wind loads.
The invention also resides in the carrier beam drive mechanism for shifting the inner end of the carrier beam and the drive mechanism for opening and closing the umbrella, being so combined with one another that they are simultaneously operable in common, which results in an improved and reliable drive of the standing umbrella, and which also permits various different development possibilities.
The invention also resides in other features of the standing umbrella as clearly set forth in the claims.
The mast can consist of a solid profile, however, a preferred profile is that of a closed hollow cross section. The closed hollow cross section provides not only good bending and torsional rigidity, but also leads to a wei
REFERENCES:
patent: 373809 (1887-11-01), Blunt
patent: 3383814 (1968-05-01), Rowe
patent: 4424824 (1984-01-01), Becher
patent: 4606366 (1986-08-01), Collet
patent: 5116258 (1992-05-01), Vennik
patent: 5386842 (1995-02-01), Becher
Glatz AG
Mai Lanna
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