# US 2017/0284293 A1 · Heat shield and part shielded with such a heat shield

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- Number: US 2017/0284293 A1
- Document ID: US20170284293A1
- Status: Published application
- Kind: A1
- Application number: 15/507,273
- Filed: 2015-08-28
- Published: 2017-10-05
- Earliest claimed: 2014-09-01
- Assignees: Reinz-Dichtungs-GmbH
- Applicants: Reinz-Dichtungs-GmbH
- Inventors: HELMUT OSTERMEIER
- Web page: https://patentgrep.com/patent/US20170284293A1

## CPC

- F02B 77/11: Thermal or acoustic insulation
- B32B 3/04: characterised by {at least one} layer folded at the edge, e.g. over another layer {; characterised by at least one layer enveloping or enclosing a material}
- B32B 3/06: for securing layers together; for attaching the product to another member, e.g. to a support {, or to another product, e.g. groove/tongue, interlocking}
- B32B 3/26: characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids {(foam layer B32B5/18; layer of synthetic resin characterised by fillers that create voids or cavities B32B27/205); characterised by an apertured layer}
- B32B 3/266: {characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12}
- B32B 5/022: {Non-woven fabric}
- B32B 5/024: {Woven fabric}
- B32B 5/026: {Knitted fabric}
- B32B 5/028: {Net structure, e.g. spaced apart filaments bonded at the crossing points}
- B32B 5/06: characterised by a fibrous {or filamentary} layer {mechanically connected, e.g. by needling} to another layer, e.g. of fibres, of paper
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/14: next to a fibrous or filamentary layer
- F16L 59/021: {comprising a single piece or sleeve, e.g. split sleeves; consisting of two half sleeves; comprising more than two segments}
- F16L 59/028: {Compositions for or methods of fixing a thermally insulating material}
- F16L 59/029: {layered}
- B32B 5/02: characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)}
- B32B 2262/10: Inorganic fibres
- B32B 2262/101: Glass fibres
- B32B 2262/103: Metal fibres
- B32B 2262/106: Carbon fibres, e.g. graphite fibres
- B32B 2262/12: Conjugate fibres, e.g. core/sheath or side-by-side
- B32B 2266/045: Metal
- B32B 2307/306: Resistant to heat
- B32B 2307/72: Density
- B32B 2605/00: Vehicles
- B60R 13/0869: {for protecting heat sensitive parts, e.g. electronic components}
- F16L 59/02: Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR

## Abstract

The present invention relates to a heat shield for shielding of hot areas, such as hot areas of a combustion engine as well as a part that is shielded with such a heat shield. The heat shield for shielding of hot areas, e. g. of a combustion engine, with at least one metal sheet layer, characterized in that the insulating layer comprises a metallic grid, which is embedded into a fiber mat.

## Claims

### Claim at position 1

1-21. (canceled)

### Claim 22

A heat shield for shielding of hot areas of a combustion engine comprising:
at least one metal sheet layer;
an insulating layer arranged adjacent to the metal sheet layer,
wherein the insulating layer comprises a metallic grid, which is embedded into a fiber mat.

### Claim 23 (depends on 22)

The heat shield according to claim 22, wherein at least a part of the fibers of the fiber mat penetrates openings of the metallic grid.

### Claim 24 (depends on 22)

The heat shield according to claim 22, wherein the metallic grid relative to the respective local thickness of the fiber mat is distanced to the surface of the fiber mat facing the metal sheet layer by at least 5% of the thickness of the fiber mat and/or to the surface of the fiber mat pointing away from the metal sheet layer by at the most 35% of the thickness of the fiber mat and the metallic grid.

### Claim 25 (depends on 22)

The heat shield according to claim 22, wherein the thickness of the fiber mat is ≧4.5 mm and ≦15 mm.

### Claim 26 (depends on 22)

The heat shield according to claim 22, wherein the fiber mat comprises at least one of glass fibers, mineral fibers and carbon fibers.

### Claim 27 (depends on 26)

The heat shield according to claim 26, wherein the fibers of the fiber mat as fiber pile or fiber loop penetrate the metallic grid orthogonal to its facial extension or are interwoven with the metallic grid.

### Claim 28 (depends on 26)

The heat shield according to claim 26, wherein the fibers are adhesively bonded to the metallic grid.

### Claim 29 (depends on 26)

The heat shield according to claim 26, wherein the fibers of the fiber mat in individual areas or throughout the fiber mat are fixed with a binder.

### Claim 30 (depends on 29)

The heat shield according to claim 29, wherein the fibers of the fiber mat are fixed with the binder in edge regions.

### Claim 31 (depends on 29)

The heat shield according to claim 29, wherein the fibers of the fiber mat are fixed with the binder in areas close to surfaces of the fiber mat.

### Claim 32 (depends on 29)

The heat shield according to claim 29, wherein the binder content in the fiber mat is ≦25% of the total weight of the fiber mat.

### Claim 33 (depends on 22)

The heat shield according to claim 22, wherein the fiber mat contains no binder.

### Claim 34 (depends on 26)

The heat shield according to claim 26, wherein one, several or all of the fibers comprise one or several metallic fibers as core.

### Claim 35 (depends on 26)

The heat shield according to claim 26, wherein free ends of the fibers engage behind bridges of the metallic grid.

### Claim 36 (depends on 26)

The heat shield according to claim 26, wherein hooks protrude from the metallic grid, the hooks engage behind the fibers of the fiber mat, with the hooks protruding less far from the plane of facial extension of the metal grid than the fibers of the fiber mat.

### Claim 37 (depends on 22)

The heat shield according to claim 22, wherein the metallic grid is a metallic weave, expanded metal sheet, perforated metal sheet, or tanged metal sheet.

### Claim 38 (depends on 23)

The heat shield according to claim 23, wherein at least one opening of the metallic grid is round, triangular, square, rhombic or hexagonal.

### Claim 39 (depends on 38)

The heat shield according to claim 38, wherein at least one opening of the metallic grid is shaped as a regular hexagon where the corners are rounded with corner radii R with 0.2 mm≦R≦1.0 mm.

### Claim 40 (depends on 23)

The heat shield according to claim 23, wherein at least one of the openings of the metallic grid in a top view to the openings show a regular shape, which can be transferred into itself with a rotation around its central axis by 360°/n with n being a natural number.

### Claim 41 (depends on 23)

The heat shield according to claim 23, wherein at least one opening of the metallic grid in a top view to the openings have the basic shape of a polygon with protrusions protruding from the sides of the polygon into the opening, where the protrusions are designed as hooks, which engage behind the fibers of the fiber mat, where the hooks protrude less far from the plane of facial extension of the metallic grid than the fibers of the fiber mat.

### Claim 42 (depends on 23)

The heat shield according to claim 23, wherein the mesh width of the openings of the metallic grid is ≧8 mm and ≦25 mm.

### Claim 43 (depends on 22)

The heat shield according to claim 22, wherein the fiber mat is a weave selected from the group of a loop weave, a pile, a knitted fabric, a warp knitted fabric, a roving or a fleece.

### Claim 44 (depends on 43)

The heat shield according to claim 43, wherein the fiber mat is
a) a loop weave with a density in loops of ≧2/cm2 and ≦30/cm2 or
b) a pile with a fiber density in erected fibers of ≧9/cm2 and 100/cm2.

### Claim 45 (depends on 22)

The heat shield according to claim 22, wherein a side of the fiber mat pointing away from the metal sheet layer rests on the area to be shielded or is arranged at least adjacent to the area to be shielded with a maximum distance of ≦3 mm over at least 75% of the contact surface.