Lift door panel
AssigneeInventio AG
InventorsFrank Thielow, Harald Feistenauer
Life of this patent
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Abstract
A lift door panel which, apart from a good sound and vibration damping with a high degree of rigidity, is producible to be largely distortion-free, wherein a warping in the case of fire and under high heat effect is reduced or avoided. The door panel has a front and back wall which are connected together by a first connection which is releasable under the action of heat and has at least a second heat-resistant connection.
Claims15
A lift door panel having a metal front wall and a metal back wall, the front and back walls being joined by heat-releaseable connecting means to allow relative movement between the front and back walls at an elevated temperature, and at least one heat-resistant connection between the front and back walls to maintain the door lift panel as a unitary entity at the elevated temperature.
Dependencies are inferred from the claim text.