US 4,565,220 AGranted

Liquid metering and fluidic transducer for electronic computers

AssigneeBowles Fluidics Corporation

InventorRonald D. Stouffer

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Abstract

The invention relates to fluidic transducers of electrical signals from an electronic computer for accurately metering flow of a liquid to a utilization device. A liquid filled hollow channel means is accelerated along the flow axis thereof to produce a fluid control signal for a bistable fluidic switch element having a pressurized, cross-over type interaction region leading to a common outlet and to a pair of output passageways. In a preferred embodiment, electrical signals from an electronic computer are supplied to a coil centered by a spring in a magnetic field, first in one direction of current flow and then in the opposite direction, to introduce bidirectional movement of the coil and the hollow channel means coupled thereto. The signals are preferably frequency modulated (but may be pulse width modulated).

Claims16

Dependent claims

In a liquid metering apparatus for a utilization system having computer means for producing electrical control signals for controlling the liquid flow to said utilization system, the improvement comprising,

bistable fluidic switch means, said bistable fluidic switch means having a diverging-converging reversing chamber in which the pressure is always greater than any downstream pressure, and a power nozzle supplying liquid under pressure from a liquid supply to said diverging-converging reversing chamber and then through a common outlet to at least a pair of output channels,
means for converting electronic control signals from said computer to fluid signals for controlling the switched state of said fluidic switch element,
a first output channel connected to said common outlet for delivering liquid to said utilization system when said bistable fluidic switch is in one of its bistable states,
a second output connected to said common outlet constituting a return to said liquid supply when said bistable fluidic switch is in the other of its bistable states, and
means controlled by said electronic control signals for controlling said means for converting to switch the states of said bistable fluidic switch element and control the amount of liquid flow to said first channel and said utilization system.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/470,791Filed 28 Feb 1983
Granted: 21 Jan 1986
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F15C 1/08
Circuit elements having no moving parts: boundary-layer devices, e.g. wall-attachment amplifiers coanda effect
F02M 7/106
Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means: fluid amplifier as a device for influencing the…
Y10T 137/0753
Fluid handling: control by change of position or inertia of system
Y10T 137/218
Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]: means to regulate or vary operation of device