Vehicle mounted crane
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 14, 1991
Grant Date -
N/A
app pub date -
Apr 14, 1989
filing date -
Apr 14, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The possibility of the end 26 of a boom 20 of a vehicle mounted crane being moved downwardly into engagement with part of the crane or the vehicle on which it is mounted and causing damage thereto during elevation of a mast 18 for the crane from a stowed position (FIG. 2) to an elevated position (FIG. 1) is avoided in a construction wherein the mast 18 is formed of a parallelogram linkage including rigid links 60 and cylinders 72 which assure that the attitude of the boom 20 relative to a base 10 for the crane will not change during elevation of the mast 18.
First Claim
Family
International Classification(s)
Cited Art Landscape
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