Communications: electrical – Selective – Having indication or alarm
Patent
1985-05-03
1987-07-21
Swann, III, Glen R.
Communications: electrical
Selective
Having indication or alarm
180282, 200 6145R, 340689, B60Q 100
Patent
active
046821457
ABSTRACT:
A level sensing system with a level sensor-data transmitter and a data receiver-display for use particularly with long (18 wheel type) trailer dump trucks plagued with a problem hazard of trailer turn over as it is elevated in the dumping process. The sensor-data transmitter is placed in a desired location on the truck trailer where it is to monitor a level condition generally on the trailer frame in the area of the trailer rear wheels, and the data receiver display is located in the truck cab for observation by the operator. The level sensor includes a plumb vane mounted with two right angle pivot axis-pitch and roll with the rotation around the roll axis when the wheels are not level. Since the plumb vane tends to remain vertical, the frame around it, attached to the truck trailer, moves relative to the vane with this movement in the roll plane sensed and data, with roll beyond a predetermined limit, transmitted reflecting roll axis angular rotation. With a roll .THETA. angle within preselected plus and minus limits the operator gets a green light display in the cab and if the roll .THETA. angle is outside the preselected limits a left red light or right red light will show indicating a hazardous tractor trailer rear wheel axis slant that could result in tipping of the trailer.
REFERENCES:
patent: 2562567 (1951-07-01), Moledzky
patent: 3772643 (1973-11-01), Dodd
patent: 3772646 (1973-11-01), Keith
patent: 3921128 (1975-11-01), Snead
patent: 4320384 (1982-03-01), Carlson
patent: 4565010 (1986-01-01), Herman
Hofsass Jeffery A.
Kintzinger Warren H.
Swann III Glen R.
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