US5201530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layered brush seal
Assignee: RTX Corp
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Filing: 1991-10-18
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Granted: 1993-04-13
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Expires: 2011-10-18
Abstract
Abstract The present invention is a brush seal for use between two components which move relative to each other. The brush seal has multiple layers of bristles, and the bristles within a particular layer have the same cross-sectional area or "thickness". The layers are arranged in the order of increasing thickness, with the bristles of the layer that forms the high pressure face of the brush seal having the smallest cross-sectional area. The larger bristles support the smaller bristles, and a backing plate supports the larger bristles.
Inventors
- 👤 George W. Kelch
- 👤 John L. Shade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:10
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; F16J15/3288
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
129 words
A brush seal comprising: a backing plate having a first surface terminating in a first edge; a first layer including a plurality of first bristles, each first bristle having a first cross-sectional area and aligned parallel to the first surface; a second layer including a plurality of second bristles sandwiched between and contacting the first layer of first bristles and the first surface, each second bristle having a second cross-sectional area greater than the first cross-sectional area and aligned parallel to the first surface; each of the first and second bristles having a tip portion which extends beyond the first edge and terminates in a second end; and, means for securing a first end of each of the first and second bristles in fixed relation to the backing plate.
Claim 2
Dependent Claim
129 words
A brush seal comprising: a backing plate having a first surface terminating in a first edge; a first layer including a plurality of first bristles, each first bristle having a first cross-sectional area and aligned parallel to the first surface; a second layer including a plurality of second bristles sandwiched between and contacting the first layer of first bristles and the first surface, each second bristle having a second cross-sectional area greater than the first cross-sectional area and aligned parallel to the first surface; each of the first and second bristles having a tip portion which extends beyond the first edge and terminates in a second end; and, means for securing a first end of each of the first and second bristles in fixed relation to the backing plate.
Claim 3
Dependent Claim
17 words
The brush seal of claim 1 wherein the first bristles are aligned parallel to adjacent second bristles.
Claim 4
Dependent Claim
19 words
The brush seal of claim 1 wherein the first bristles are oriented at an angle to adjacent second bristles.
Claim 5
Dependent Claim
16 words
The brush seal of claim 2 wherein the second ends are tapered toward the first edge.
Claim 6
Dependent Claim
16 words
The brush seal of claim 3 wherein the second ends are tapered toward the first edge.
Claim 7
Dependent Claim
185 words
A brush seal comprising: a backing plate having a first surface terminating in a first edge; a first layer including a plurality of first bristles, each first bristle having a first cross-sectional area and aligned parallel to the first surface; a second layer including a plurality of second bristles sandwiched between and contacting the first layer of first bristles and the first surface, each second bristle having a second cross-sectional area greater than the first cross-sectional area and aligned parallel to the first surface; a third layer including a plurality of third bristles, each third bristle having a third cross-sectional area and aligned parallel to the first surface, said third cross-sectional area being less than said first cross-sectional area, said plurality of first bristles sandwiched between said plurality of second bristles and said plurality of third bristles; and, means for securing a first end of each of the first, second and third bristles in fixed relation to the backing plate; wherein each of the first, second and third bristles has a tip portion which extends beyond the first edge and terminates in a second end.
Claim 8
Dependent Claim
185 words
A brush seal comprising: a backing plate having a first surface terminating in a first edge; a first layer including a plurality of first bristles, each first bristle having a first cross-sectional area and aligned parallel to the first surface; a second layer including a plurality of second bristles sandwiched between and contacting the first layer of first bristles and the first surface, each second bristle having a second cross-sectional area greater than the first cross-sectional area and aligned parallel to the first surface; a third layer including a plurality of third bristles, each third bristle having a third cross-sectional area and aligned parallel to the first surface, said third cross-sectional area being less than said first cross-sectional area, said plurality of first bristles sandwiched between said plurality of second bristles and said plurality of third bristles; and, means for securing a first end of each of the first, second and third bristles in fixed relation to the backing plate; wherein each of the first, second and third bristles has a tip portion which extends beyond the first edge and terminates in a second end.
Claim 9
Dependent Claim
17 words
The brush seal of claim 6 wherein the first bristles are aligned parallel to adjacent second bristles.
Claim 10
Dependent Claim
16 words
The brush seal of claim 7 wherein the second ends are tapered toward the first edge.
Claim 11
Dependent Claim
61 words
The brush seal of claim 7 wherein each of the third bristles is longer than each of the first bristles, each of the first bristles is longer than each of the second bristles, all of the third bristles are of equal length, all of the first bristles are of equal length, and all of the second bristles are of equal length.
Claim 12
Dependent Claim
19 words
The brush seal of claim 6 wherein the first bristles are oriented at an angle to adjacent second bristles.
Claim 13
Dependent Claim
16 words
The brush seal of claim 10 wherein the second ends are tapered toward the first edge.
Claim 14
Dependent Claim
19 words
The brush seal of claim 10 wherein the third bristles are oriented at an angle to adjacent first bristles.
Claim 15
Dependent Claim
16 words
The brush seal of claim 12 wherein the second ends are tapered toward the first edge.
Claim 16
Dependent Claim
180 words
A brush seal for preventing the flow of a fluid from a high pressure region to a low pressure region, said brush seal comprising: a backing plate having a first surface terminating in a first edge, said backing plate mounted to a first component adjacent to a second component which moves relative to the first component; a first layer including a plurality of first bristles, each first bristle having a first cross-sectional area and aligned parallel to the first surface; a second layer including a plurality of second bristles sandwiched between and contacting the first layer of first bristles and the first surface, each second bristle having a second cross-sectional area greater than the first cross-sectional area and aligned parallel to the first surface; and means for securing a first end of each of the bristles in fixed relation to the backing plate; wherein each of the bristles has a tip portion which extends beyond the first edge and terminates in a second end, said tip portions defining a boundary between said high pressure region and said lower pressure region.
Claim 17
Dependent Claim
180 words
A brush seal for preventing the flow of a fluid from a high pressure region to a low pressure region, said brush seal comprising: a backing plate having a first surface terminating in a first edge, said backing plate mounted to a first component adjacent to a second component which moves relative to the first component; a first layer including a plurality of first bristles, each first bristle having a first cross-sectional area and aligned parallel to the first surface; a second layer including a plurality of second bristles sandwiched between and contacting the first layer of first bristles and the first surface, each second bristle having a second cross-sectional area greater than the first cross-sectional area and aligned parallel to the first surface; and means for securing a first end of each of the bristles in fixed relation to the backing plate; wherein each of the bristles has a tip portion which extends beyond the first edge and terminates in a second end, said tip portions defining a boundary between said high pressure region and said lower pressure region.
Claim 18
Dependent Claim
17 words
The brush seal of claim 14 wherein the first bristles are aligned parallel to adjacent second bristles.
Claim 19
Dependent Claim
16 words
The brush seal of claim 15 wherein the second ends are tapered toward the first edge.
Claim 20
Dependent Claim
39 words
The brush seal of claim 15 wherein each of the first bristles is longer than each of the second bristles, all of the first bristles are of equal length, and all of the second bristles are of equal length.
Claim 21
Dependent Claim
19 words
The brush seal of claim 14 wherein the first bristles are oriented at an angle to adjacent second bristles.
Claim 22
Dependent Claim
16 words
The brush seal of claim 18 wherein the second ends are tapered toward the first edge.
Claim 23
Dependent Claim
76 words
The brush seal of claim 18 further comprising a third layer including a plurality of third bristles, each third bristle having a third cross-sectional area and aligned parallel to the first surface, said third cross-sectional area being less than said first cross-sectional area said plurality of first bristles sandwiched between said plurality of second bristles and said plurality of third bristles, wherein each of the third bristles is oriented at an angle to adjacent first bristles.
Claim 24
Dependent Claim
16 words
The brush seal of claim 20 wherein the second ends are tapered toward the first edge.
Claim 25
Dependent Claim
61 words
The brush seal of claim 20 wherein each of the third bristles is longer than each of the first bristles, each of the first bristles is longer than each of the second bristles, all of the third bristles are of equal length, all of the first bristles are of equal length, and all of the second bristles are of equal length.
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |