Fluid handling – Self-proportioning or correlating systems – Self-proportioning flow systems
Patent
1975-06-20
1976-10-05
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Self-proportioning flow systems
60422, G05D 1103
Patent
active
039838935
ABSTRACT:
A flow divider valve assembly is provided which divides a flow of fluid between a priority flow device, such as a power steering system, and an excess flow device, such as an auxiliary mechanism. A valve spool is axially movable within the main valve bore and defines an axial bore having one end in fluid communication with the priority flow outlet port. The valve spool is movable within the main bore in response to variations in the pressure differential between the outlet ports. A first aperture communicates between the inlet port and the axial bore and the valve spool defines a spool land defining a second aperture communicating between the inlet port and the axial bore. The main valve bore defines a sealing surface disposed fluidicly between the inlet port and the excess flow outlet port, and when the power steering system is not being operated, and there is a low pressure at the priority flow outlet port, the valve spool is shifted so that the sealing surface prevents fluid flow from the inlet port through the second aperture. Thus, the only flow to the priority flow outlet port is from the inlet port through the first aperture and through the axial bore. The remainder of the flow is, preferably, from the inlet port through the main valve bore, past a pair of flats on the spool land, and to the excess flow outlet port.
REFERENCES:
patent: 3421532 (1969-01-01), Davidson
patent: 3916932 (1975-11-01), Thorsen
Eaton Corporation
Nilson Robert G.
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