Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1989-09-21
1991-04-16
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
13751615, 13762538, F16K 1508
Patent
active
050074547
ABSTRACT:
A fluid control valve comprises a slidable, tubular poppet member that is biased toward and sealingly engages dual concentric annular valve seats, which valve seats define an annular opening through which the fluid medium flows when the valve is open. When the system pressure reaches a threshold pressure the poppet member is axially displaced from the valve seats such that an annular orifice is opened between the inside edge of the poppet and the inside valve seat and another orifice is formed between the outside edge of the poppet and the outside valve seat through which orifices the fluid medium flows into a central, axially extending relief path partially defined by the inside of the poppet. The dual orifices allow the valve to open with a stroke that is about one-half that of that required in a valve with only one orifice and similar operating range.
REFERENCES:
patent: 556023 (1896-03-01), Pew
patent: 643117 (1900-02-01), Fromberger
patent: 795999 (1905-08-01), Mueller
patent: 4026322 (1977-05-01), Thomas
patent: 4140148 (1979-02-01), Richter
patent: 4766924 (1988-08-01), Lee et al.
patent: 4766930 (1988-08-01), Patti
Hepperle Stephen M.
Lee Philip J.
The Lee Company
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