# US 10,870,502 B2 · Vapor jet system enabling jetting for many seconds using multiple kinds of mutually insoluble liquid gases as fuel

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

- Number: US 10,870,502 B2
- Document ID: US10870502B2
- Status: Granted
- Kind: B2
- Application number: 15/310,419
- Filed: 2015-05-11
- Published: 2017-03-16
- Granted: 2020-12-22
- Earliest claimed: 2014-05-13
- Assignees: Japan Aerospace Exploration Agency
- Applicants: Japan Aerospace Exploration Agency
- Inventors: Junichiro Kawaguchi; Osamu Mori; Takayuki Yamamoto; Norizumi Motooka; Toshihiro Chujo
- Web page: https://patentgrep.com/patent/US10870502B2

## CPC

- F02K 9/605: {Reservoirs}
- B64G 1/401: {Liquid propellant rocket engines (Ion or plasma engines B64G1/413; Arcjets and other resistojets B64G1/415)}
- B64G 1/4021: {Tank construction; Details thereof}
- F02K 9/50: using pressurised fluid to pressurise the propellants
- F02K 99/00: Subject matter not provided for in other groups of this subclass
- F03H 99/00: Subject matter not provided for in other groups of this subclass
- F02K: JET-PROPULSION PLANTS (features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants F02C7/00, F02C9/00)
- B64G: COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- F03H: PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR (from combustion products F02K)

## Abstract

A vapor jet system to continuously jet vapors while suppressing cavitation. One vapor jet system includes a liquid storage part for separately storing two or more kinds of mutually insoluble liquids; a jet orifice; and a jet control part. Jetting the vapors is from a state where pressure in the space storing the vapors in the liquid storage part is higher than the saturated vapor pressure in any of the two or more kinds of liquids. Alternatively, a vapor jet system can include a fluid storage part storing one kind of liquid and at least one kind of inactive gas having a composition different from the liquid; a similar jet orifice; and a similar jet control part. Jetting the vapors and inactive gas(es) is (are) from a state where pressure in a vapor storing space in the fluid storage part is higher than the saturated vapor pressure in the liquid.

## Claims

### Claim 1

A vapor jet system comprising:
a first storage container including an inner wall to which a first foam metal is attached;
a first liquid held by the first foam metal;
a first vapor generated by vaporization of the first liquid in the first storage container;
a second storage container including an inner wall to which a second foam metal is attached;
a second liquid held by the second foam metal;
a second vapor generated by vaporization of the second liquid in the second storage container;
a first filter that prevents the passage of liquids;
a second filter that prevents the passage of liquids;
a jet orifice connected to a vapor passage connected to each of the first storage container and the second storage container;
a jet control part;
a first heater positioned at the first storage container; and
a second heater positioned at the second storage container, wherein
the first liquid and the second liquid are mutually insoluble.

### Claim 2 (depends on 1)

The vapor jet system according to claim 1, wherein
the first liquid is liquid ammonia or ammonia water, and the second liquid is liquid butane.

### Claim 3 (depends on 1)

The vapor jet system according to claim 1, wherein
at least one storage container of the first storage container and the second storage container further comprises a flat plate.

### Claim 4 (depends on 2)

The vapor jet system according to claim 2, wherein
at least one storage container of the first storage container and the second storage container further comprises a flat plate.

### Claim 5

A vapor jet system comprising:
a single storage container;
a separation wall positioned inside the single storage container;
a first foam metal attached to an inner wall of the single storage container;
a second foam metal attached to an inner wall of the single storage container, the second foam metal being separated from the first foam metal by the separation wall;
a first liquid held by the first foam metal;
a first vapor generated by vaporization of the first liquid in the single storage container;
a second liquid held by the second foam metal;
a second vapor generated by vaporization of the second liquid in the single storage container;
a filter that prevents the passage of liquids;
a jet orifice connected to a vapor passage connected to the single storage container;
a jet control part; and
a heater positioned at the single storage container, wherein
the first liquid and the second liquid are mutually insoluble.

### Claim 6 (depends on 5)

The vapor jet system according to claim 5, wherein
the first liquid is liquid ammonia or ammonia water; and
the second liquid is liquid butane.

### Claim 7

A vapor jet system comprising:
a first storage container including an inner wall to which a foam metal is attached;
a liquid held by the foam metal;
a vapor generated by vaporization of the liquid in the first storage container;
a second storage container;
an inactive gas in the second storage container;
a first filter that prevents the passage of liquids;
a second filter that prevents the passage of liquids;
a jet orifice connected to a vapor passage connecting to the first storage container and the second storage container;
a jet control part; and
a heater positioned at the first storage container, wherein
the inactive gas has a composition different from the liquid.

### Claim 8

A vapor jet system comprising:
a single storage container;
a separation wall positioned inside the single storage container;
a foam metal attached to an inner wall of the single storage container;
a liquid held by the foam metal;
a vapor generated by vaporization of the liquid in the single storage container;
an inactive gas in the single storage container;
a filter that prevents the passage of liquids;
a jet orifice connected to a vapor passage connecting to the single storage container;
a jet control part; and
a heater positioned at the single storage container, wherein
the inactive gas has a composition different from the liquid.