Roller door apparatus

Details Roller door apparatus Roller door apparatus

1992-09-14

1994-10-11

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Roll type

With rotating means

160291, E06B 956

Patent

active

053538595

ABSTRACT:
A roller door apparatus is provided that includes a roller means and a means journalling the roller means for reversible rotation about a central longitudinal roller axis. The roller door also includes end rail means for a reciprocal linear movement between a first position adjacent the roller means and a second position away from the roller means. Also included is a flexible curtain means with one end attached to the end rail means and the other end attached to the roller means, such that the curtain means closes a door opening with the end rail means in the second position. The curtain means winds onto the roller means when the end rail moves from the second position to the first position and vice versa. The roller door further includes a reversible electric drive motor means coupled to the roller means, and an electrical control means for controlling the drive means during movement of the end rail means for rapid acceleration of the curtain means during an initial portion of each movement, and for control of declaration of the curtain means to zero velocity during a final portion of each movement.

REFERENCES:
patent: 4507594 (1985-03-01), Takemoto
patent: 4757853 (1988-07-01), Price
patent: 4770065 (1988-09-01), Woyton
patent: 4990837 (1991-02-01), Ishitobi
patent: 5198974 (1993-03-01), Orsat

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