Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1985-02-13
1986-02-18
Cohan, Alan
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
1375962, 91 6, 91420, 91531, F15B 1309
Patent
active
045706611
ABSTRACT:
A pump 1 supplies hydraulic fluid from a reservoir 2 to hydraulically operated equipment 4 through a main flow line 3, the fluid being returned to the reservoir 2 through a return supply line 5. If the pump 1 should fail the equipment 4 may be supplied from an independent pump unit which can be connected to flow and return lines 6, 7. Because the pump 1 has failed it will be incapable of operating a dump valve 15 so the fluid will not be fed to the reservoir 2. Should there be a blockage in the equipment 4 pressure will build up in a relief valve 13 which will therefore open to allow the fluid to pass directly to the return line 5 (or 7). If the system is to be used as a source of pressurized hydraulic fluid for another unit then a change over valve 12 will be operated to de-couple the unit 4 and allow the fluid to pass to the other unit through the auxiliary supply lines 6, 7.
REFERENCES:
patent: 4201052 (1980-05-01), Breeden
patent: 4240255 (1980-12-01), Benelan
Cohan Alan
Powell Duffryn Engineering Limited
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