B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
B66B 13/18 (2006.01) B66B 13/12 (2006.01)
Patent
CA 2142073
Entraining and unlatching system for lifts with an actuating part, which is placeable as desired at the cage (12) and consists of an electromagnet (1) with magnet armature (2) and an air bellows (3) and an entraining and unlatching cam (5), which stands in operative connection with the actuating part and consists of an air bellows (26) with stiffened cam entry flanks (22), cam flanks (21) and front surface (25) The entraining and unlatching system is constructed as closed pneumatic system operating with underpressure. In the voltage-free state, the entraining and unlatching cam (5) is urged by means of an internal compression spring (14) into the extended state and the air bellows (3) of the actuating part is contracted by way of the air hose (4) and the magnet armature (2), which in addition serves as latching pin, is retracted. The entraining and unlatching rollers (6), which are splayed in this situation, in their turn unlatch the shaft door (20) by way of levers (17), tie straps (15) and push rod (8). The movements of the air bellows (3, 26) are detected by microswitches which are connected with a monitoring circuit which in the case of falling underpressure in the system starts a vacuum pump permanently connected with the system.
Ag Inventio
Riches Mckenzie & Herbert Llp
LandOfFree
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