Fluid handling – Line condition change responsive valves – Pop valves
Patent
1975-03-17
1976-10-26
Cohan, Alan
Fluid handling
Line condition change responsive valves
Pop valves
137491, F16K 2500
Patent
active
039878147
ABSTRACT:
A flow responsive poppet relief valve includes a housing having an outlet chamber and an inlet passage opening thereon to define an annular valve seat therebetween, a spool disposed for axial movement in the housing and having a head with a conical nose portion thereon, a spring disposed intermediate the housing and the spool for biasing the conical nose portion axially closably against the valve seat and whereby the spool is axially openly moved away therefrom by a fluid in the inlet passage at a predetermined pressure, and an outwardly flared surface portion on the head for assuring that upon opening movement of the spool a relatively thin fluid stream is guided by the conical nose portion in axially relatively low force-transmitting impinging relation glancingly against the flared surface portion, and upon further opening movement of the spool a relatively thicker fluid stream is guided by the conical nose portion in axially relatively greater force-transmitting impinging relation against the flared surface portion, with the streams being deflectably diverted angularly outwardly therefrom to the outlet chamber, in order to assure a stable response and a relatively high degree of pressure regulation of the poppet relief valve.
REFERENCES:
patent: 103062 (1870-05-01), Lynde
patent: 535878 (1895-03-01), Woodward
patent: 2032613 (1936-03-01), Grove
patent: 2622613 (1952-12-01), McNeal
patent: 2882922 (1959-04-01), Schindel
patent: 2980132 (1961-04-01), Prijatel et al.
patent: 3018792 (1962-01-01), Brucker
Caterpillar Tractor Co.
Cohan Alan
Lanchantin, Jr. Charles E.
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