Winch for handling an openable vent member of a building...

Details Winch for handling an openable vent member of a building... Winch for handling an openable vent member of a building...

B - Operations, Transporting

66

D

254/105

B66D 1/06 (2006.01) A62C 2/24 (2006.01) E05F 11/04 (2006.01) F24F 7/02 (2006.01)

Patent

CA 1091219

ABSTRACT OF THE DISCLOSURE The locking device comprises a rod and cooperates, on the one hand, with a ratchet wheel fixed onto the winch drum and, on the other hand, with a flap urged by a spring and which is maintained in the lowered position by a breakable pane, des- truction of said breakable pane freeing the flap which under action of the spring raises the locking device thereby freeing the ratchet wheel and the winch drum to permit the cable freely to unroll under action of a motor opening the vent member.

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