Material or article handling – Elevator or hoist and loading or unloading means therefor – Comprising means enabling additional movement of carrier or...
Patent
1990-09-25
1992-03-17
Spar, Robert J.
Material or article handling
Elevator or hoist and loading or unloading means therefor
Comprising means enabling additional movement of carrier or...
414671, B66F 914
Patent
active
050963635
ABSTRACT:
A lift truck fork positioner for respective inner and outer pairs of load-handling forks includes power actuators for selectively extending and retracting the outer pair of forks and latch assemblies for selectively detachably connecting an inner fork fixedly to a respective adjacent outer fork in spaced relation thereto automatically in response to the extension of the outer forks beyond a predetermined inner range of extension. Each latch assembly, when connecting the inner fork to the outer fork, fixedly prevents any narrowing of the spacing between the interconnected inner and outer forks, as well as fixedly preventing any widening of such spacing.
REFERENCES:
patent: 4533290 (1985-08-01), Hackauf
Cascade Corporation drawing "Double Fork Positioner", (undated).
Gaibler Dennis W.
Petronek David W.
Schweitzer Troy J.
Weinert Harry F.
Cascade Corporation
Keenan James
Spar Robert J.
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