# US 4,393,898 A · Fluid outlet device and a method of controlling fluid flow through a nozzle

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,393,898 A
- Document ID: US4393898A
- Status: Granted
- Kind: A
- Application number: 06/219,637
- Filed: 1980-12-24
- Granted: 1983-07-19
- Earliest claimed: 1979-12-28
- Assignees: Nissan Motor Co., Ltd.
- Inventors: Masao Izumi; Hiroshi Yoshida; Yukio Yoshikawa
- Web page: https://patentgrep.com/patent/US4393898A

## CPC

- B05B 1/083: {the pulsating mechanism comprising movable parts}
- F15C 1/04: Means for controlling fluid streams to fluid devices, e.g. by electric signals {or other signals, no mixing taking place between the signal and the flow to be controlled (fluid information or pulse transducers F15B5/00; electric regulation with electro-fluid amplifiers G05B7/02; fluid operating means for indicating or recording members in measuring instruments G01D5/42; distribution or supply devices for servomotors with electrically-controlled pilot valves F15B13/043)}
- F24F 13/06: Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- Y10T 137/2213: Electrically-actuated element [e.g., electro-mechanical transducer]
- Y10T 137/86389: Programmer or timer
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- F15C: FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES (transducers F15B5/00, {F15B21/00}; fluid dynamics in general F15D; computer comprising fluid elements G06D, G06G; {electric control by means of electro-hydraulic or electro-pneumatic amplifiers G05B7/02})
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A fluid passing through a nozzle operative on the principle of wall effect of fluidic devices is variously deflected. A pair of control valves are provided at control fluid passages for supplying control jets into the throat portion of the nozzle in order to control the deflection of fluid flowing therethrough. A continuous straightforward flow is generated by simultaneous opening of said control valves.

## Claims

### Claim 1

A fluid outlet device for directing a fluid comprising:
(a) a nozzle including the following portion;
(1) an inlet port;
(2) an outlet port;
(3) a throat portion formed between said inlet port and outlet ports;
(4) first and second fluid control chambers positioned on either side of said throat;
(5) first and second control fluid passages communicating with respective fluid control chambers;
(6) first and second flappers for regulating the flow of fluid through respective control fluid passages; and
(7) first and second electromagnets for controlling the operation of respective flappers, and
(b) a control circuit comprising:
(1) first and second switching means for actuating respective electromagnets;
(2) a control signal generator for supplying timed alternating square wave pulses to respective switching means; and
(3) first and second delay means respectively connected to said first and second switching means for retarding respective turn off timings thereof.

### Claim 2 (depends on 1)

A fluid outlet device as set forth in claim 1, wherein the duty factors of said timed alternating square wave pulses are variable.

### Claim 3 (depends on 1)

A fluid outlet device as set forth in claim 1, wherein said delay means comprises first and second capacitors respectively connected between the base and the collector of said first and second switching means.

### Claim 4 (depends on 1)

A fluid outlet device as set forth in claim 1, further comprising a switch incorporated in the control circuit for supplying driving currents to either first and second electromagnets.

### Claim 5 (depends on 1)

A fluid outlet device as set forth in claim 1 wherein said switching means comprise driving transistors.