Communications: electrical – Land vehicle alarms or indicators – For school bus
Patent
1993-03-23
1995-04-11
Peng, John K.
Communications: electrical
Land vehicle alarms or indicators
For school bus
340487, 180281, 116 39, B60Q 126
Patent
active
054062519
ABSTRACT:
A pivoting safety apparatus is adapted for mounting on a motor vehicle. The safety apparatus comprises a housing for mounting on the motor vehicle and a safety device pivotally coupled with the housing for movement about an axis between a retracted position and an extended position. An actuator at least partially located within the housing is comprised of an air cylinder having a piston arm extending from a piston and coupled to the safety device for movement of the safety device about the pivot axis in response to variations from atmospheric pressure of air within the air cylinder. An air pressure adjuster comprised of an electrically powered air compressor, a fluid coupling extending between the air compressor and the air cylinder, and an electrically operated valve is employed for altering the air pressure within the air cylinder to move the piston, the piston arm, and the safety device. In a preferred embodiment, a pressure sensor senses the pressure within the air pressure adjuster and causes the air compressor to stop operating when a predetermined pressure is sensed.
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Peng John K.
Tong Nina
LandOfFree
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