# US 12,110,931 B2 · Piston housing body

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- Number: US 12,110,931 B2
- Document ID: US12110931B2
- Status: Granted
- Kind: B2
- Application number: 18/292,330
- Filed: 2021-07-28
- Published: 2024-08-08
- Granted: 2024-10-08
- Earliest claimed: 2021-07-28
- Assignees: Nippon Light Metal Company, Ltd.
- Applicants: Nippon Light Metal Company, Ltd.
- Inventors: Kaoru Sugita; Shimpei Kubota
- Web page: https://patentgrep.com/patent/US12110931B2

## CPC

- F16D 55/228: with a separate actuating member for each side
- F16D 65/0087: {Brake housing guide members, e.g. caliper pins; Accessories therefor, e.g. dust boots}
- F16D 65/02: Braking members; Mounting thereof (friction linings or attachment thereof F16D69/00)
- F16D 65/0068: {Brake calipers}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

The present invention provides a piston housing body capable of achieving downsizing and weight reduction. In a piston housing body having a main body portion provided with at least a pair of piston housing portions for housing at least a pair of opposing pistons, an operating fluid circulation flow path connecting the piston housing portions, and a connection portion for connecting an operating fluid supply flow path to the operating fluid circulation flow path, the operating fluid circulation flow path is constituted by a pipe, both end portions of the pipe are cast in the main body portion, and an intermediate portion of the pipe and the connection portion are exposed outside the main body portion.

## Claims

### Claim 1

A piston housing body comprising:
a main body portion having at least a pair of piston housing portions for housing a pair of opposing pistons;
an operating fluid circulation flow path for connecting the piston housing portions; and
a connection portion for connecting an operating fluid supply flow path to the operating fluid circulation flow path, wherein
the operating fluid circulation flow path is constituted by a pipe,
both end portions of the pipe are cast in the main body portion, and an intermediate portion of the pipe and the connection portion are exposed outside the main body portion,
a part of a cross section of the intermediate portion of the pipe is embedded in the main body portion, and a portion where flux applied to the pipe is melted and wetted is in close contact with the piston housing body, and
an remaining part of the cross section of the intermediate portion of the pipe is exposed outside the main body portion.

### Claim 2 (depends on 1)

The piston housing body according to claim 1, wherein
an annular flange, an annular groove, or an annular roughened portion is formed on the pipe,
flux is applied at least to the flange, the groove, or the roughened portion, and
the flange, the groove, or the roughened portion is cast in the main body portion.