US Patent No. 9,933,115


Patent No. 9,933,115
Issue Date April 03, 2018
Title Systems For Filling A Gas Cylinder
Inventorship Gordon E. Rado, Waxhaw, NC (US)
Jay P. Phillips, Concord, NC (US)
Assignee Scott Technologies, Inc., Boca Raton, FL (US)

Claim of US Patent No. 9,933,115

1. A flow control valve (FCV) comprising: a housing defining a cavity therein, the housing having an input port for receiving a gas from a gas supply, and an output port for delivering the gas to a gas cylinder; the cavity defining a staging area fluidly connected to the input port, a delivery area fluidly connected to the output port, and a pressurization area fluidly connected to a feedback sensing port, the feedback sensing port receiving pressurized fluid that is pressurized to a pressure level representative of the pressure level of gas delivered to the gas cylinder; a piston slidably positioned in a channel extending between the pressurization area and the delivery area, a position of the piston changing a rate of flow of gas through the flow control valve, the piston position moving in response to a pressure at the feedback sensing port; and an aperture located between the delivery area and the staging area, the piston further comprising a needle valve extending through the aperture, the needle valve controlling the flow of gas through the aperture.