Patent ID: 7237439
Filing Date: 2007-07-03
Classification: B60C,F16K,G01L

Abstract:
1. A pressure gauge featuring over-pressure protection for a pressure sensing element, the gauge comprising in combination: a receiver adapted to mount to a valve stem of a gas chamber which is to have its pressure monitored by said pressure gauge; a valve core coupled to a path extending to said receiver, said valve core adapted to be coupled to a source of gas at a higher pressure than gas within the gas chamber; a pressure sensor in fluid communication with said path at a port between said valve core and said receiver; and a sensor protector adjacent said port and between said valve core and said pressure sensor, said sensor protector adapted to limit a fluid pressure encountered by said pressure sensor to a pressure less than a pressure of gas entering said valve core wherein said sensor protector includes a divider wall adapted to route gas traveling from said valve core to said receiver along a side of said divider wall opposite said pressure sensor, with said pressure sensor primarily only in fluid communication with said path at a location downstream from said divider wall, such that a venturi effect reduces a pressure sensed by said pressure sensor when gas is flowing from said valve core to said receiver.