Railways – Elevators – Track control
Patent
1989-12-14
1991-05-21
Oberleitner, Robert J.
Railways
Elevators
Track control
104 94, 104 96, 104131, B65G 100, B66B 1718
Patent
active
050165410
ABSTRACT:
A greenhouse transport system for moving plants and plant trays through a greenhouse comprising a cart including a carriage assembly having at least one roller extending upwardly from the cart, an overhead track assembly including at least one track channel to selectively receive the roller to support the cart thereon, and at least one lift station including a lift member movable between a lower and upper position having a lift channel formed thereon to receive the roller therein and an alignment assembly such that when the lift member is in the lower position the roller is operatively disposed in the lift channel and the lift channel is axially aligned relative to the track channel by the alignment assembly as the lift member is moved from the lower position to the upper position to permit the cart to be moved from the lift channel to the track channel whereby the roller is disposed within the track channel for movement through the greenhouse on the overhead track assembly.
REFERENCES:
patent: 2256862 (1941-09-01), Duffy
patent: 2667983 (1954-02-01), Billings
patent: 3611946 (1971-10-01), Heximer
patent: 4109584 (1978-08-01), Mihirogi
patent: 4395180 (1983-07-01), Magnotte
patent: 4411357 (1983-10-01), Caddell
patent: 4876965 (1989-10-01), Koslowski et al.
patent: 4938149 (1990-07-01), Lotzer
Fisher III A. W.
Le Mark T.
Oberleitner Robert J.
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