Self contained air operated pivoting sign device for vehicle

Details Self contained air operated pivoting sign device for vehicle Self contained air operated pivoting sign device for vehicle

1991-02-20

1992-11-24

Ng, Jin F.

Communications: electrical

Land vehicle alarms or indicators

For school bus

340487, 116 39, 180281, B60Q 126

Patent

active

051666634

ABSTRACT:
An electrically operated, air-driven pivotal sign device includes a housing and a sign assembly pivotally mounted to the housing. Within the housing, an electrically driven air compressor is pneumatically coupled through tubing and a three-way, electrically controlled valve, to a spring return type air cylinder coupled with a shaft from the pivotable sign assembly. Current supplied through a single wire to the device activates the compressor and closes the valve to atmosphere permitting pressurization of the air cylinder. The compressor is shut off automatically when the sign assembly is deployed. The sign assembly remains deployed until current is cut off to the valve, which causes the valve to vent the pneumatic coupling to atmosphere. The single wire also supplies current to a flasher device within the housing which flashes lights provided on the sign assembly simultanously with the pivotal deployment of the sign assembly.

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patent: 4956630 (1990-09-01), Wicker

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