Telescopic boom mechanism
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United States of America Patent
Stats
-
Oct 13, 1987
Issued Date -
N/A
app pub date -
Sep 25, 1986
filing date -
Mar 15, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telescopic boom for use on an elevating apparatus includes a first boom, a second boom telescopically disposed in the first boom, a third boom telescopically disposed in the second boom, a rolling mechanism disposed between the first and third booms and rollingly movably on wall surfaces of the first and third booms, and a locking lever assembly disposed on each of ends of the second and third booms in the first boom for selectively engaging the rolling mechanism to connect the rolling mechanism to one of the second and third booms at a time.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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