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US 5,207,256 AGranted
Safety device for a raisable curtain door
AssigneeNergeco
InventorBernard Kraeutler
Life of this patent
Estimating the term…
Abstract
A goods-handling door of the type comprising a raisable curtain constituted by a flexible curtain having horizontal reinforcing bars disposed at regular intervals, e.g. a roll-up door or a raisable door that folds concertina-like, wherein the lowermost bar is flexible and lighter than the other bars.
Claims6
A goods-handling door comprising:
- two vertical lateral uprights, each of them having a vertical slideway;
- a raisable flexible curtain having a bottom edge;
- curtain lifting means including an electric motor for lifting said curtain in order to leave way to a person or a goods-handling vehicle;
- a plurality of horizontal reinforcing bars, each of said bars being fixed to said curtain,
- each of said reinforcing bar having two ends which slide in said slideways, said plurality of reinforcing bars including intermediate reinforcing bars and a lowermost reinforcing bar disposed at a distance above said bottom edge of said curtain;
- and an additional, flexible bar, disposed at said bottom edge of said curtain, said flexible bar being flexible and deformable so that a shock received at the bottom edge of the curtain will not injure a person or damage a goods-handling vehicle.
3 more elements
Dependencies are inferred from the claim text.