Elevator – industrial lift truck – or stationary lift for vehicle – Having independent supports carrying distinct loads and...
Patent
1993-10-27
1995-11-07
Noland, Kenneth
Elevator, industrial lift truck, or stationary lift for vehicle
Having independent supports carrying distinct loads and...
187410, 182 12, B66B 900
Patent
active
054640725
ABSTRACT:
A self-propelled elevator car for vertical and horizontal travel in an elevator shaft has a plurality of driven friction wheels which are pressed against associated running surfaces by a passive contact force which produces the necessary friction and is influenced by a load-dependent gravitational force and an additional regulated active force. The friction wheels are rotatably mounted at free ends of guide arms having opposite ends pivotally connected to a lifting carriage attached to the bottom of the car. The guide arms extend downwardly and outwardly at a defined angle to the horizontal of a straight line between the pivot point and a contact point of the friction wheels with the running surface such that the gravitational force acting on the car forces the wheels outwardly. The active force can be applied by setting elements connected between the carriage and the guide arms. A force sensor mounted at the pivot point senses the passive force and is connected to a processor control which controls the active force applied by the setting elements in accordance with the value of the passive force.
REFERENCES:
patent: 2052690 (1936-09-01), Austin
patent: 5090515 (1992-02-01), Takahashi et al.
Inventio AG
Noland Kenneth
LandOfFree
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