# US 2013/0157075 A1 · Brazing Structure, Ceramic Heater, and Glow Plug

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- Number: US 2013/0157075 A1
- Document ID: US20130157075A1
- Status: Published application
- Kind: A1
- Application number: 13/682,536
- Filed: 2012-11-20
- Published: 2013-06-20
- Earliest claimed: 2005-07-26
- Assignees: KYOCERA Corporation
- Inventors: Takahiro MARUYAMA
- Web page: https://patentgrep.com/patent/US20130157075A1

## CPC

- B32B 15/043: {of metal (B32B15/01 takes precedence)}
- F23Q 7/001: {Glowing plugs for internal-combustion engines}
- H05B 3/141: {Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds}
- H05B 3/48: heating conductor embedded in insulating material
- H05B 2203/027: Heaters specially adapted for glow plug igniters
- Y10T 428/12535: with additional, spatially distinct nonmetal component
- Y10T 428/131: Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- F23Q: IGNITION (devices or installations peculiar to internal-combustion engines F02P; of cigarettes or tobacco A24F; compositions therefor, chemical igniters C06C); EXTINGUISHING-DEVICES
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Disclosed is a brazing structure that includes a ceramic member, a metal layer, a tubular metal fitting and first and second brazing members. The ceramic member includes a small diameter portion and a large diameter portion. The metal layer is located on an outer surface of the large diameter portion. At least an edge of the ceramic member is inserted in the fitting. The first brazing member connects the inner surface of the fitting to the metal layer. The second brazing member does not contact with the metal layer, and fills between at least a part of the small diameter portion and the inner surface, which faces to the part of the small diameter portion, of the fitting. The small diameter portion is located closer to the edge than the metal layer and is inside the fitting.

## Claims

### Claim at position 1

1-12. (canceled)

### Claim 13

A brazing structure comprising:
a ceramic member having a small diameter portion and a large diameter portion;
a metal layer on an outer surface of the large diameter portion;
a tubular metal fitting in which at least an edge of the ceramic member is inserted;
a first brazing member connecting the inner surface of the tubular metal fitting to the metal layer; and
a second brazing member filled between at least a part of the small diameter portion and the inner surface of the tubular metal fitting, the inner surface facing to the part of the small diameter;
wherein the small diameter portion is located closer to the edge of the ceramic member than the metal layer and is inside the tubular metal fitting, and
wherein the second brazing member does not contact with the metal layer.