192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1996-11-06
1998-11-24
Marmor, Charles A.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
74625, 160310, 49140, F16D 6700, E05F 1500
Patent
active
058395555
ABSTRACT:
An automatic clutch type chain pulling mechanism for a motor rolling door for releasing the brake and winding up the door curtain by pulling the chain during electricity cutoff. The chain pulling mechanism is enclosed in a housing and is provided on the rotating shaft of the motor from the outside end inward with a drive block fixed on the rotating shaft of the motor which forms along its circumference a plurality of lugs protruding radially outward, an intermediate disk having an elongated radial slot and formed with a raised circular flange on its circumference with a friction clamping ring inserted within the inner surface of the flange, and a releasing rod mechanism. The releasing rod mechanism includes a brake releasing rod with one end fixed with a pin inserted into the elongated slot and the other end pivoted and having a pair of wing plates inclined upward fixed on the pivoted end for pushing an intermediate lever. The intermediate lever having one end pivoted acts upon an actuating lever fixed integrally with a cam pin of the drum brake assembly. The chain sprocket can be pulled by a chain via external force and is rotatably mounted on the housing. On the inner surface of the chain sprocket, there is a pivotally mounted triggering plate acted upon by a leaf spring, the plate has two lower sides formed with two branch arms for actuating the fixed drive block and a protruding actuating pin fixed on the lower middle part for actuating the friction clamping ring.
REFERENCES:
patent: 2110231 (1938-03-01), McCloud
patent: 2670065 (1954-02-01), Stevens
patent: 2957521 (1960-10-01), Greegor
patent: 3134273 (1964-05-01), Wardlaw
patent: 4782593 (1988-11-01), Kieser et al.
patent: 5203392 (1993-04-01), Shea
patent: 5579878 (1996-12-01), Hsieh
Joyce William C
Marmor Charles A.
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