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US4657264A
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Fluid seal assembly with segmented sub-assembly
Assignee: Ingersoll Rand Co
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Filing: 1985-11-01
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Granted: 1987-04-14
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Expires: 2005-11-01
Abstract
Abstract A pair of beveled-face load rings between which is confined a seal ring sub assembly formed of segmented, polytetrafluoroethylene seals. The seals too have beveled faces which slidably engage the beveled faces of the load rings and, thereby, are prevented from manifesting undue wear and extrusion. Three seal segments of the seal ring assembly form an inner seal which is slidably supported on a land formed on a three-segment outer seal of the seal ring assembly. A circumferential spring urges the segments of the inner and outer seals inwardly into sealing engagement with a to-be-sealed shaft or the like. Locating pins fixed in, and extending from, the outer seal nestably engage the inner seal segments and restrain the latter against unwarranted circumferential displacement.
Inventors
- 👤 Wayne F. Wehber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:23
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/12; F04D29/122; F16; F16J; F16J15/00; F16J15/16; F16J15/166
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
71 words
A fluid seal assembly, comprising: a pair of annular, load rings; and a seal ring subassembly interpositioned between said load rings; wherein said seal ring subassembly, and said load rings, have mutually-engaging surfaces which cooperate to restrain said seal ring subassembly against undue radial displacement; said seal ring subassembly comprises two pluralities of segments; and each segment of said pluralities thereof subtends an arc of approximately one hundred degrees of arc.
Claim 2
Dependent Claim
71 words
A fluid seal assembly, comprising: a pair of annular, load rings; and a seal ring subassembly interpositioned between said load rings; wherein said seal ring subassembly, and said load rings, have mutually-engaging surfaces which cooperate to restrain said seal ring subassembly against undue radial displacement; said seal ring subassembly comprises two pluralities of segments; and each segment of said pluralities thereof subtends an arc of approximately one hundred degrees of arc.
Claim 3
Dependent Claim
55 words
A fluid seal assembly, according to claim 1, wherein: said load rings have first, parallel surfaces, and second, non-parallel, beveled surfaces; said seal ring subassembly has external, non-parallel, beveled surfaces; and said second, beveled surfaces of said load rings, and said external, beveled surfaces of said seal ring subassembly, are slidably engaged with each other.
Claim 4
Dependent Claim
44 words
A fluid seal assembly, according to claim 1, wherein: one of said pluralities of segments comprises an inner seal ring; the other of said pluralities of segments comprises an outer seal ring; and said inner and outer seal rings have radial gaps formed therein.
Claim 5
Dependent Claim
43 words
A fluid seal assembly, according to claim 3 wherein: said radial gaps formed in said inner seal ring are shrouded by said outer seal ring; and said radial gaps formed in said outer seal ring are bridged across by said inner seal ring.
Claim 6
Dependent Claim
29 words
A fluid seal assembly, according to claim 3 wherein: said outer seal ring has a land formed thereon; and said inner seal ring is slidably supported on said land.
Claim 7
Dependent Claim
45 words
A fluid seal assembly, according to claim 5 wherein: said outer seal ring has a shoulder, formed thereon, which extends from said land in an attitude normal to said land; and said inner seal ring has an outermost, peripheral surface which seats against said shoulder.
Claim 8
Dependent Claim
38 words
A fluid seal assembly, according to claim 1, wherein: said load rings have a given, common, inside diameter; and said seal ring subassembly has an inside diameter which differs from said given inside diameter of said load rings.
Claim 9
Dependent Claim
28 words
A fluid seal assembly, according to claim 7, wherein: said given inside diameter of said load rings is greater than said inside diameter of said seal ring subassembly.
Claim 10
Dependent Claim
22 words
A fluid seal assembly, according to claim 1 wherein: said load rings, of said pair thereof, are mirror images of each other.
Claim 11
Dependent Claim
77 words
A fluid seal assembly, comprising: a pair of annular, load rings; and a seal ring subassembly interpositioned between said load rings; wherein said seal ring subassembly, and said load rings, have mutually-engaging surfaces which cooperate to restrain said seal ring subassembly against undue radial displacement; said load rings, of said pair thereof, are substantially mirror images of each other; and one of said load rings has a plurality of radially-disposed grooves formed in an outer surface thereof.
Claim 12
Dependent Claim
77 words
A fluid seal assembly, comprising: a pair of annular, load rings; and a seal ring subassembly interpositioned between said load rings; wherein said seal ring subassembly, and said load rings, have mutually-engaging surfaces which cooperate to restrain said seal ring subassembly against undue radial displacement; said load rings, of said pair thereof, are substantially mirror images of each other; and one of said load rings has a plurality of radially-disposed grooves formed in an outer surface thereof.
Claim 13
Dependent Claim
25 words
A fluid seal assembly, according to claim 2, further including: spring means bound about said seal ring subassembly urging said seal ring subassembly to contract.
Claim 14
Dependent Claim
57 words
A fluid seal assembly, according to claim 3, wherein: one of said inner and outer seal rings has orientation means, engageable with the other of said inner and outer seal rings, for restraining said other seal ring in a predetermined location, relative to said one seal ring, and inhibiting said other seal ring from circumferential displacement therefrom.
Claim 15
Dependent Claim
38 words
A fluid seal assembly, according to claim 12, wherein: said orientation means comprises locating pins fixed in said outer seal ring, and projecting therefrom; and said inner seal ring has recesses formed therein which nestably engage said pins.
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) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |