High lift warning system

Details High lift warning system High lift warning system

1991-12-04

1993-05-04

Olszewski, Robert P.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 847, B60S 1300

Patent

active

052072975

ABSTRACT:
A warning system for use in lifting apparatus to signal when an object has been lifted to a predetermined elevation. A source of electromagnetic energy and a photodetector cooperate to create a beam which extends over the object being lifted. When the object obstructs the beam, an alarm is activated.

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Automotive Lifts & Machinery Corp. brochure "ALM 2-Post Vehicle Lifts" Feb. 1, 1990.
G & H Products brochure "Uni-Lift Model 390" undated.
Precision Metal Works brochure "Mule 3000" undated.
Snap-On Tools Corporation brochure "Above Ground Lifts For The Professional" undated.

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