US5085443A
Expired / Lapsed
US
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Labyrinth seal
Assignee: Syensqo Specialty Polymers USA LLC
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Filing: 1990-05-29
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Granted: 1992-02-04
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Expires: 2010-05-29
Abstract
Abstract This invention relates to a labyrinth seal comprising a first side in alignment with a radial axis and a second side opposite said first side, said first and said second side each including an inclined tooth, and an inner-axial surface in alignment with an axial axis and an outer-axial surface opposite said inner-axial surface having at least one hole extending to said inner-axial surface, said inner-axial surface including a plurality of teeth extending substantially inwardly toward the axial axis having grooves therebetween.
Inventors
- 👤 Robert L. Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:47
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/443; B; B04; B04B; B04B3/00; B04B3/02; C; C09; C09K; C09K3/00; C09K3/10; F26; F26B; F26B5/00; F26B5/08; C09K2200/00; C09K2200/06; C09K2200/0645; C09K2200/0667; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
87 words
A floating labyrinth seal comprising: a first side in alignment with a radial axis and a second side opposite said first side, said first and said second side each including a generally axially extending inclined tooth, and an inner-axial surface in alignment with an axial axis and an outer-axial surface opposite said inner-axial surface having at least one purge opening extending to said inner-axial surface, said inner-axial surface including at least four teeth each having an apex extending substantially inwardly toward the axial axis having grooves therebetween.
Claim 2
Dependent Claim
87 words
A floating labyrinth seal comprising: a first side in alignment with a radial axis and a second side opposite said first side, said first and said second side each including a generally axially extending inclined tooth, and an inner-axial surface in alignment with an axial axis and an outer-axial surface opposite said inner-axial surface having at least one purge opening extending to said inner-axial surface, said inner-axial surface including at least four teeth each having an apex extending substantially inwardly toward the axial axis having grooves therebetween.
Claim 3
Dependent Claim
31 words
The seal of claim 1, wherein said plurality of substantially inwardly extending teeth on said inner-axial surface are at least slightly inclined in a direction pointing away from said purge opening.
Claim 4
Dependent Claim
12 words
The seal of claim 1, wherein said teeth are generally wedge shaped.
Claim 5
Dependent Claim
14 words
The seal of claim 1, wherein said outer-axial surface has at least one channel.
Claim 6
Dependent Claim
26 words
The seal of claim 4, further comprising an O-ring adapted to fit at least partially in at least one of said channels in said outer-axial surface.
Claim 7
Dependent Claim
12 words
The seal of claim 1, wherein said seal comprises a poly (amide-imide).
Claim 8
Dependent Claim
106 words
The seal of claim 1, wherein said seal comprises a thermoplastic, amide-imide resinous material comprising at least one recurring unit of the following moieties: ##STR4## wherein one carbonyl group is meta to and one carbonyl group is para to each amide group and wherein Z is a trivalent benzene ring or lower-alkyl-substituted trivalent benzene ring, R comprises one or more wholly- or largely-aromatic hydrocarbon radicals of from 6 to about 10 carbon atoms or two divalent aromatic hydrocarbon radicals of from 6 to about 10 atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 --, and --S--.
Claim 9
Dependent Claim
9 words
The seal of claim 6 wherein R is ##STR5##
Claim 10
Dependent Claim
105 words
A floating labyrinth seal comprising: a first side in alignment with a radial axis and a second side opposite said first side, said first and said second side each including a plurality of generally axially extending inclined teeth extending away from an axial axis, and an inner-axial surface in alignment with the axial axis and an outer-axial surface opposite said inner-axial surface having at least one purge opening extending to said inner-axial surface, said inner-axial surface including at least four inclined teeth each having an apex extending generally toward the axial axis in a direction pointing away from said purge opening and having grooves therebetween.
Claim 11
Dependent Claim
105 words
A floating labyrinth seal comprising: a first side in alignment with a radial axis and a second side opposite said first side, said first and said second side each including a plurality of generally axially extending inclined teeth extending away from an axial axis, and an inner-axial surface in alignment with the axial axis and an outer-axial surface opposite said inner-axial surface having at least one purge opening extending to said inner-axial surface, said inner-axial surface including at least four inclined teeth each having an apex extending generally toward the axial axis in a direction pointing away from said purge opening and having grooves therebetween.
Claim 12
Dependent Claim
34 words
The seal of claim 9, wherein said plurality of inclined teeth on said first and said second side are disposed at an angle of less than about 50° with respect to the axial axis.
Claim 13
Dependent Claim
33 words
The seal of claim 9, wherein said plurality of inclined teeth on said inner-axial surface are disposed at an angle ranging from about 50° to about 85° with respect to the axial axis.
Claim 14
Dependent Claim
20 words
The seal of claim 9, further comprising a seating means for allowing said seal to sit at least partially therein.
Claim 15
Dependent Claim
21 words
The seal of claim 12, wherein said seating means surrounds and is substantially adjacent to said outer-axial surface of the seal.
Claim 16
Dependent Claim
14 words
The seal of claim 12, wherein said outer-axial surface has a plurality of channels.
Claim 17
Dependent Claim
38 words
The seal of claim 14, further comprising an O-ring having a first side adapted to fit at least partially in at least one of said channels in said outer-axial surface and a second side adjacent said seating means.
Claim 18
Dependent Claim
104 words
The seal of claim 9, wherein said seal comprises a thermoplastic, amide-imide resinous material comprising at least one of the following moieties: ##STR6## wherein one carbonyl group is meta to and one carbonyl group is para to each amide group and wherein Z is a trivalent benzene ring or lower-alkyl-substituted trivalent benzene ring, R comprises one or more wholly- or largely-aromatic hydrocarbon radicals of from 6 to about 10 carbon atoms or two divalent aromatic hydrocarbon radicals of from 6 to about 10 atoms joined directly or by stable linkages selected from the group consisting of --O--, methylene, --CO--, --SO 2 --, and --S--.
Claim 19
Dependent Claim
19 words
The seal of claim 9, wherein said plurality of teeth are generally wedge shaped and each includes an apex.
Claim 20
Dependent Claim
43 words
The seal of claim 9, wherein at least one of said inclined teeth on each of said first and said second side and at least one of said inclined teeth on said inner-axial surface comprise a bumper means for enduring shock and vibrations.
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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) | 1995-02-03 | 1995-08-05 | 1996-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-03 | 1999-08-05 | 2000-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-03 | 2003-08-05 | 2004-02-04 | $7700.00 | Window Closed / Lapsed |