Patent ID: 7404412
Filing Date: 2008-07-29
Classification: F16K,Y10T

Abstract:
1. An inflation stem, comprising: an inflation valve, that is biased to a closed position partly by the pressure of fluid inside an inflatable object, and partly by an elastic member; a valve actuating pin, that when depressed by a filling device, forces the inflation valve open, and simultaneously opens both a fill chamber through which the fluid flows into the inflatable object and a blow-off chamber, said fill chamber and said blow-off chamber being isolated from one another; a blow-off chamber intake that is substantially separated from a fill chamber exit, and enables the pressure within the blow-off chamber to remain the same as the general pressure inside the inflatable object; and a blow-off valve biased to a closed position, but being forced open when the pressure within the blow-off chamber exceeds a predetermined pressure.