Photoelectric operator position detector

Details Photoelectric operator position detector Photoelectric operator position detector

2007-08-21

2007-08-21

Trieu, Van T. (Department: 2612)

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

C340S573100, C340S576000

Reexamination Certificate

active

11143794

ABSTRACT:
A method and apparatus for reinforcing the training received by an operator of a material handling vehicle to maintain the operator's feet and legs in the operator compartment includes a first and second photoelectric beam extending across the entry to the compartment. When a deadman brake is released and the vehicle is commanded to move or is actually moving, the detectors sense the presence of objects extending through the entry. When objects are sensed, a vehicle brake can be applied, a visual or audio sensor can be activated, or the detected fault can be stored in memory. The faults can be used by a supervisor to calculate an operator rating.

REFERENCES:
patent: 3507350 (1970-04-01), Boyajian
patent: 4840248 (1989-06-01), Silverman
patent: 5272187 (1993-12-01), Gross et al.
patent: 5835008 (1998-11-01), Colemere, Jr.
patent: 6137398 (2000-10-01), Dunlap et al.
patent: 6474753 (2002-11-01), Rieth et al.
patent: WO98/09910 (1998-03-01), None

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