Control valve

Details Control valve Control valve

1988-10-12

1989-06-06

Rivell, John

Fluid handling

Systems

Dividing into parallel flow paths with recombining

13761417, 1376142, 251 33, F15B 13042

Patent

active

048362450

ABSTRACT:
A control valve including a change-over poppet formed into a substantially cylindrical shape, a guide pipe inserted into the change-over poppet, and a load check poppet slidably fitted on the guide pipe. The change-over poppet is formed with a communication hole. A parallel passage is provided so as to communicate through the communication hole and guide pipe with an on-off valve, and between the parallel passage and the on-off valve is arranged an orifice. Opening of the on-off valve causes fluid to flow through the orifice and pressure loss to occur across the orifice to increase a pressure on an upstream side of the orifice, which acts to open the change-over poppet.

REFERENCES:
patent: 2532568 (1950-12-01), Myers
patent: 2752946 (1956-07-01), Towler et al.

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