US PATENT SUBCLASS 187 / 393
.~ Monitors operational parameter

Current as of: June, 1999
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187 /   HD   ELEVATOR, INDUSTRIAL LIFT TRUCK, OR STATIONARY LIFT FOR VEHICLE

391  DF  WITH MONITORING, SIGNALLING, AND INDICATING MEANS {2}
393.~ Monitors operational parameter {1}
394  DF  .~.~> Load support position

DEFINITION

Classification: 187/393

Monitors operational parameter:

(under subclass 391) Subject matter wherein the physical condition checked or sensed is one which it is essential for anyone maintaining or using the elevator to know for the safe or proper functioning of the elevator (e.g., position, speed, direction).