Security system of construction machinery
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United States of America Patent
Stats
-
Feb 14, 2006
Grant Date -
Jul 24, 2003
app pub date -
Apr 2, 2002
filing date -
Apr 5, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A security system for a construction machine including a construction machine equipped with a body controller for storing a first password, management apparatus arranged in a location apart from the construction machine and a portable communications unit for storing a second password provided communicably with the management apparatus and the body controller. The portable communications unit, receiving the first password from the management apparatus, replaces the second password with the first password. The body controller determines whether the second password output from the portable communications unit coincides with the first password. In case these passwords coincide with each other, an engine drive signal is output. Otherwise the engine is kept inoperable. This prevents possible theft of a construction machine.
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