Telescoping crane arm
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United States of America Patent
Stats
-
Nov 14, 1995
Grant Date -
N/A
app pub date -
Apr 11, 1994
filing date -
Apr 10, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telescoping crane arm assembly includes a base body; a power cylinder extendable from and retractable into the base body; a plurality of crane arm segments extendable from and retractable into one another and the base body; a first mechanism coupling the power cylinder to the crane arm segments for extending the crane arm segments as a unit from the base body when the power cylinder moves from a retracted position into an extended position relative to the base body; and a second mechanism coupling the power cylinder to the crane arm segments for extending the crane arm segments relative to one another when the power cylinder moves from an extended position into a retracted position relative to the base body.
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