Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1977-02-04
1978-04-18
Blunk, Evon C.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
B66B 1104
Patent
active
040846601
ABSTRACT:
A lifting device for moving two goods carrying platforms between different levels. The platforms are provided to perform a synchronous displacing movement in opposite directions relative to each other in one single path of travel. For the movement of the platforms transmission means are provided including two elongated flexible traction elements, preferably two chains. The one end of each element is fixed by anchoring to a stationary part of the lifting device and the other end is fixed to one of the platforms. A number of pulleys are provided to perform a linear reciprocating movement by means of driving means and thereby bring about a longitudinal change of a loop provided for each one of the traction elements and stretching around the respective pulley in opposite directions so that the loop which is connected with one of the platforms is lengthened, at the same time as the loop which is connected with the other platform is shortened and vice versa. Further means is provided to move aside the platform which is moving in the return direction in order to provide free passage for the platform, which is moving in the intended direction of goods transfer, which means comprises pivoting means for the platforms.
REFERENCES:
patent: 1748438 (1930-02-01), Bernstein
patent: 1884641 (1932-10-01), Fitch
Blunk Evon C.
Rowland James L.
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