Ceramic bolt for exhaust panel

Patent metadata

Field	Value
Publication number	US-2016169261-A1
Application number	US-201514965435-A
Country	US
Kind code	A1
Filing date	Dec 10, 2015
Priority date	Dec 16, 2014
Publication date	Jun 16, 2016
Grant date	—

Abstract

Aspects of the disclosure are directed to a bolt assembly comprising: a ceramic fastener, and metal threads coupled to the ceramic fastener. Aspects of the disclosure are directed to a system comprising: a panel configured to provide thermal insulation, and a bolt assembly coupled to the panel, the bolt assembly comprising: a ceramic fastener, and metal threads coupled to the ceramic fastener.

First claim

What is claimed is:

1 . A bolt assembly comprising:
a ceramic fastener; and metal threads coupled to the ceramic fastener.

2 . The bolt assembly of claim 1 , wherein the threads are coupled to the fastener by casting or molding the threads onto the fastener.

3 . The bolt assembly of claim 1 , wherein the threads are coupled to the fastener by crimping a sleeve of metal onto the fastener.

4 . The bolt assembly of claim 1 , wherein the threads are coupled to the fastener by brazing the threads onto the fastener.

5 . The bolt assembly of claim 1 , wherein the fastener comprises a mechanical feature configured to capture the threads.

6 . The bolt assembly of claim 5 , wherein the mechanical feature is substantially bulb-shaped.

7 . The bolt assembly of claim 1 , wherein the ceramic fastener comprises silicon nitride.

8 . The bolt assembly of claim 1 , wherein brazing is used to attach the metal threads to the fastener.

9 . A system comprising:
a panel configured to provide thermal insulation; and a bolt assembly coupled to the panel, the bolt assembly comprising:
a ceramic fastener; and
metal threads coupled to the ceramic fastener.

10 . The system of claim 9 , wherein the panel includes a ceramic matrix composite.

11 . The system of claim 9 , wherein the panel includes at least one slot configured to seat the bolt assembly.

12 . The system of claim 11 , wherein the at least one slot is located on a side of the panel corresponding to a flow path associated with an engine.

13 . The system of claim 11 , wherein the at least one slot includes a female nut configured to mate with the threads.

14 . The system of claim 9 , wherein at least one of the panel or the bolt includes a coating.

15 . The system of claim 9 , wherein the panel is coupled to an exhaust system of an engine.

Assignees

• United Technologies Corp

Inventors

• Peters Donald W
• Martinez Jr Gonzalo F

Classifications

• F16B33/004 Primary

  Sealing; Insulation (by means of washers F16B43/001) · CPC title

• F01N13/1805

  Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body (pipe joints in general F16L; fixing auxiliaries in motor vehicles in general B60K) · CPC title

• F16B5/02

  by means of fastening members using screw-thread ({F16B5/0004 takes precedence}; construction of screw-threaded connections F16B25/00 - F16B39/00) · CPC title

• F16B33/006

  Non-metallic fasteners using screw-thread · CPC title

• F16B2200/85

  Ceramic-to-metal-connections · CPC title