Locking device for a sliding door

Details Locking device for a sliding door Locking device for a sliding door

1978-04-25

1980-04-22

Kannan, Philip C.

Movable or removable closures

With operator for movably mounted closure

Operator drives closure along guide

49139, 49449, 74 8915, 744248R, 192141, E05F 1134

Patent

active

041987861

ABSTRACT:
A sliding door of the type employed in public transport vehicles and driven by an electric motor comprises at least one door-leaf coupled with a nut mounted on an endless screw which is driven in rotation in order to open and/or close the door. The nut is displaced in translational motion within a guide which prevents rotational motion. The locking device comprises means for interrupting the translational displacement of the guided nut at the end of travel and for permitting angular rotation of the nut with the endless screw, means for limiting the angular displacement of the nut and finally means for limiting the translational motion of the nut if it is displaced along the endless screw and no longer engaged in the guide.

REFERENCES:
patent: 1900009 (1933-03-01), Christenson
patent: 3745705 (1973-07-01), Reddy
patent: 4091570 (1978-05-01), Favrel

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