Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1991-02-25
1992-01-21
Dayoan, D. Glenn
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
414631, 414678, B66B 920
Patent
active
050820907
ABSTRACT:
A stacking mast for being attached to a lift truck and for moving a load between a negative position and a positive position. The stacking mast includes an elongated first mast, the first mast including a lower end for being attached to the lift truck and including an upper end; an elongated second mast, the second mast including a lower end and an upper end; a floating carriage having a first securing structure for being slidably secured to the first mast and a second securing structure for being slidably secured to the second mast; a support carriage slidably attached to the second mast for supporting the load; and lift structure for moving the support carriage between a lower position and an upper position on the second mast and for moving the second mast between a lower position and an upper position on the first mast. A second embodiment is also described in which one or both of the first or second masts may telescope, allowing a reduced un-telescoped height for passing through doorways or under obstacles, while substantially preserving the full positive and negative lift.
REFERENCES:
patent: 2399632 (1946-05-01), Guerin
patent: 2641336 (1953-06-01), Chanda
patent: 2767394 (1956-10-01), Arnot et al.
patent: 2918143 (1959-12-01), Shaffer
patent: 3841442 (1974-10-01), Erickson et al.
patent: 4614253 (1986-09-01), Furukawa
patent: 4889038 (1989-12-01), Bentivoglio
Dayoan D. Glenn
Reichard Dean A.
Taylor Machine Works, Inc.
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