Fluidic resistive element

Details Fluidic resistive element Fluidic resistive element

1975-11-07

1976-09-14

Wayner, William E.

Fluid handling

Flow affected by fluid contact, energy field or coanda effect

Means to regulate or vary operation of device

236 93R, 236101R, F15C 104

Patent

active

039801039

ABSTRACT:
A resistive element for a fluidic system having a load and a supply of wong fluid at a supply pressure which is a constant independent of temperature. The resistive element comprises a housing, of a relatively low temperature coefficient of expansion material such as a steel, enclosing a pair of coplanar plates of predetermined dimensions and fabricated from a relatively high temperature coefficient of expansion material, such as a magnesium alloy. The adjacent walls of the plates define the sidewalls of a channel for fluid flow. The plates are slidably mounted inside the housing so as to vary the width of the rectangular channel at a constant rate in response to incremental variations in the fluid temperature. The constant variation in channel width keeps the Reynolds number of the fluid passing through the channel at a substantially constant value despite small increments in the fluid temperature about its operating temperature.

REFERENCES:
patent: 3091393 (1963-05-01), Sparrow
patent: 3442278 (1969-05-01), Petersen
patent: 3457933 (1969-07-01), Craft
patent: 3721257 (1973-03-01), DeSantis et al.
patent: 3840177 (1974-10-01), Osheroff
patent: 3937398 (1976-02-01), Waeldner et al.

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