# US 11,897,638 B2 · Pressurized structure panel and cylinder

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

- Number: US 11,897,638 B2
- Document ID: US11897638B2
- Status: Granted
- Kind: B2
- Application number: 17/861,550
- Filed: 2022-07-11
- Published: 2023-01-19
- Granted: 2024-02-13
- Earliest claimed: 2021-07-13
- Assignees: Mitsubishi Heavy Industries, Ltd.
- Applicants: Mitsubishi Heavy Industries, Ltd.
- Inventors: Hiromichi Akiyama; Naoto Azusawa; Yutaka Terada
- Web page: https://patentgrep.com/patent/US11897638B2

## CPC

- B64G 1/54: Protection against radiation
- B64G 1/56: Protection against meteoroids or space debris
- B64G: COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR

## Abstract

A pressurized structure panel for forming a pressurized space pressurized inside includes a panel structure having a panel body to receive the pressure, a rib provided in the panel body, and a hollow part formed by the panel body and the rib, a radiation shielding material provided in the hollow part, and a debris bumper provided outside the panel structure and provided spaced apart from the panel structure by a certain spacing. The radiation shielding material includes a material containing hydrogen atoms in molecules.

## Claims

### Claim 1

A pressurized structure panel for forming a pressurized space pressurized inside, the pressurized structure panel comprising:
a panel structure having a panel body to receive pressure, a rib provided in the panel body, and a hollow part formed by the panel body and the rib;
a radiation shielding material provided in the hollow part; and
a debris bumper outside the panel structure and spaced apart from the panel structure by a gap therebetween,
wherein the radiation shielding material includes a material containing hydrogen atoms in molecules.

### Claim 2 (depends on 1)

The pressurized structure panel according to claim 1, wherein the panel structure has a sandwich panel structure including:
an inner panel serving as the panel body,
an outer panel outside the inner panel, and
an intermediate member between the inner panel and the outer panel, the intermediate member serving as the rib forming the hollow part.

### Claim 3 (depends on 1)

The pressurized structure panel according to claim 1, wherein at least one of the panel structure and the debris bumper comprises a composite material including reinforcing fibers impregnated with a resin.

### Claim 4 (depends on 1)

The pressurized structure panel according to claim 1, wherein the radiation shielding material is a liquid.

### Claim 5 (depends on 4)

The pressurized structure panel according to claim 4, further comprising a temperature adjustment unit configured to adjust a temperature of the liquid.

### Claim 6 (depends on 1)

The pressurized structure panel according to claim 1, wherein the radiation shielding material includes a water-absorbent polymer serving as a precursor, and
wherein the water-absorbent polymer is configured to absorb water to form the radiation shielding material.

### Claim 7 (depends on 1)

A cylinder formed in a tubular shape, the cylinder comprising the pressurized structure panel according to claim 1.

### Claim 8 (depends on 1)

The pressurized structure panel according to claim 1, wherein the material containing hydrogen atoms in molecules is a material having molecules with a larger Z/A ratio and a smaller A than aluminum, wherein Z is atomic number and A is mass number.

### Claim 9 (depends on 1)

The pressurized structure panel according to claim 1, wherein the radiation shielding material includes water circulating through the hollow part of the panel structure.