Semiautomatic sliding door device with tension spring

Details Semiautomatic sliding door device with tension spring Semiautomatic sliding door device with tension spring

1979-12-05

1981-11-24

Kannan, Philip C.

Movable or removable closures

With means mounting closure for reciprocation

16 78, 16 82, 188267, E05D 1506

Patent

active

043016235

ABSTRACT:
A semiautomatic sliding door device comprising a sliding door, an outer framework slidably supporting the door for movement between the positions of `open` and `closed` and a driving device comprising a tension spring energizing the sliding door toward the `closed` position, a connecting wire, and a guide wheel for guiding the wire. This device is equipped with a braking device comprising permanent magnets on the outer framework and a braking plate made of copper or aluminum sheets on the sliding door. Coiling said wire around the block in proper manner, the length of elongation of the tension spring can be reduced relative to the stroke of the sliding door.

REFERENCES:
patent: 801694 (1905-10-01), Sheppard
patent: 3389422 (1968-06-01), Glenn
patent: 3579003 (1971-05-01), Gray
patent: 3723795 (1973-03-01), Baermann
patent: 3978617 (1976-09-01), Eventoff
patent: 4003102 (1977-01-01), Hawks et al.

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