Patent US4595207A successfully refreshed from Google Patents.
US4595207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush seal labyrinth sealing means between two machine parts
Assignee: MTU Aero Engines AG
•
Filing: 1985-07-09
•
Granted: 1986-06-17
•
Expires: 2005-07-09
Abstract
Abstract A seal between two machine parts for sealing separate spaces at different pressure from each other comprising a brush seal extending at an acute angle to a principal axis of at least one machine part for use in spatially constricted constructions with small clearances, particularly fluid-flow engines such as airplane jet engines, for sealing rotating or stationary parts.
Inventors
- 👤 Joachim Popp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:02
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; F16J15/3288
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
86 words
Sealing means between two machine parts for sealing separate spaces at different pressures from one another, one of said machine parts having a principal axis, said sealing means comprising a brush seal including a holder and a plurality of bristles extending from said holder, and means supporting said holder on the other of said machine parts at an acute angle to said principal axis of said one machine part such that said bristles abut against a surface of the other of said machine parts perpendicularly thereto.
Claim 2
Dependent Claim
86 words
Sealing means between two machine parts for sealing separate spaces at different pressures from one another, one of said machine parts having a principal axis, said sealing means comprising a brush seal including a holder and a plurality of bristles extending from said holder, and means supporting said holder on the other of said machine parts at an acute angle to said principal axis of said one machine part such that said bristles abut against a surface of the other of said machine parts perpendicularly thereto.
Claim 3
Dependent Claim
27 words
Sealing means as claimed in claim 1 wherein the surface of said other machine part forms the same angle with said principal axis as said holder does.
Claim 4
Dependent Claim
20 words
Sealing means as claimed in claim 1 wherein at least one of said parts is rotatable about said principal axis.
Claim 5
Dependent Claim
16 words
Sealing means as claimed in claim 1 wherein at least one of said parts is stationary.
Claim 6
Dependent Claim
29 words
Sealing means as claimed in claim 1 wherein at least one of said parts is movable with respect to the other of said parts relative to said principal axis.
Claim 7
Dependent Claim
30 words
Sealing means as claimed in claim 1 wherein a first of said parts comprises a shaft having opposite end regions, said brush seal being at one of said end regions.
Claim 8
Dependent Claim
25 words
Sealing means as claimed in claim 1 wherein a first of said parts comprises a hollow shaft, said brush seal being arranged at said shaft.
Claim 9
Dependent Claim
16 words
Sealing means as claimed in claim 7 wherein said brush seal is arranged within said shaft.
Claim 10
Dependent Claim
15 words
Sealing means as claimed in claim 7 wherein said brush seal is outside said shaft.
Claim 11
Dependent Claim
25 words
Sealing means as claimed in claim 1 wherein a first of said parts comprises a housing and said brush seal extends annularly on said housing.
Claim 12
Dependent Claim
13 words
Sealing means as claimed in claim 1 wherein said brush seal is stationary.
Claim 13
Dependent Claim
22 words
Sealing means as claimed in claim 11 wherein a first of said machine parts comprises a shaft surrounded by said brush seal.
Claim 14
Dependent Claim
28 words
Sealing means as claimed in claim 1 wherein said machine parts comprise respective shafts which rotate relative to one another, said brush seal being arranged between said shafts.
Claim 15
Independent Claim
108 words
A method of sealing two separate spaces at different pressures by two machine parts which axially overlap one another, at least in part, said method comprising disposing a brush seal between overlapping facing surfaces of the axially overlapped two machine parts to seal the parts at said surfaces, securing a holder of the brush seal on one of said surfaces, the bristles of said brush seal extending from the holder perpendicularly to the other of said surfaces for contact therewith, and disposing the brush seal at an acute angle to the axis of the overlap of the machine parts whereby to minimize the clearance between the overlapped parts.
Claim 16
Independent Claim
108 words
A method of sealing two separate spaces at different pressures by two machine parts which axially overlap one another, at least in part, said method comprising disposing a brush seal between overlapping facing surfaces of the axially overlapped two machine parts to seal the parts at said surfaces, securing a holder of the brush seal on one of said surfaces, the bristles of said brush seal extending from the holder perpendicularly to the other of said surfaces for contact therewith, and disposing the brush seal at an acute angle to the axis of the overlap of the machine parts whereby to minimize the clearance between the overlapped parts.
Claim 17
Dependent Claim
25 words
A method as claimed in claim 14 wherein said facing surfaces of the parts extend at an angle to the axial overlap of the parts.
Claim 18
Dependent Claim
32 words
A method as claimed in claim 15 wherein the parts have coincident axes and the brush seal is disposed at an angle to said coincident axes and is formed to extend therearound.
Claim 19
Dependent Claim
20 words
A method as claimed in claim 16 wherein at least one of said parts is rotated around said coincident axes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-16 | 1989-12-16 | 1990-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-16 | 1993-12-16 | 1994-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-16 | 1997-12-16 | 1998-06-17 | $7700.00 | Window Closed / Lapsed |