US3854735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static face seal
Assignee: ExxonMobil Upstream Research Co
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Filing: 1972-10-24
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Granted: 1974-12-17
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Expires: 1992-10-24
Abstract
Abstract A static face seal for sealing the clearance gap between a pair of radial surfaces including an elastomeric seal ring, a plastic backup ring, and a soft metal anti-extrusion ring. The antiextrusion ring includes a first portion defining an axially extending surface and a second portion defining an outwardly sloping surface. The anti-extrusion ring is adapted to fit snugly into a groove having an outer surface complementary to the axially extending and sloping surfaces of the anti-extrusion ring.
Inventors
- 👤 W Maurer
- 👤 E Lock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:59
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/16; F16J15/166
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
129 words
A static face seal assembly for sealing the junction of a pair of radially extending surfaces, one of said surfaces having a groove formed therein, said groove being defined in part by an outer axially extending wall having a beveled edge, said static face seal assembly comprising a seal ring disposed in said groove for sealing the clearance gap between said pair of radially extending surfaces; a soft-metal anti-extrusion ring having a first portion which defines an axially extending surface sized to fit in close conformity with said axially extending wall of said groove, and a second portion which defines an outwardly sloping shoulder adapted to engage said beveled edge in said one of said surfaces and the other of said surfaces to prevent extrusion of said seal ring.
Claim 2
Dependent Claim
129 words
A static face seal assembly for sealing the junction of a pair of radially extending surfaces, one of said surfaces having a groove formed therein, said groove being defined in part by an outer axially extending wall having a beveled edge, said static face seal assembly comprising a seal ring disposed in said groove for sealing the clearance gap between said pair of radially extending surfaces; a soft-metal anti-extrusion ring having a first portion which defines an axially extending surface sized to fit in close conformity with said axially extending wall of said groove, and a second portion which defines an outwardly sloping shoulder adapted to engage said beveled edge in said one of said surfaces and the other of said surfaces to prevent extrusion of said seal ring.
Claim 3
Dependent Claim
25 words
An anti-extrusion ring as defined in claim 1 wherein said anti-extrusion ring is composed of a metal having a Brinnel hardness less than about 100.
Claim 4
Dependent Claim
23 words
An anti-extrusion ring as defined in claim 2 wherein said first portion is sized to provide interference fit with said axially extending wall.
Claim 5
Dependent Claim
36 words
An anti-extrusion ring as defined in claim 2 wherein the allowance between said axially extending surface of said first portion and the axially extending wall of said groove is between 0 and a negative 0.004 inches.
Claim 6
Dependent Claim
33 words
An anti-extrusion ring as defined in claim 2 wherein the sloping shoulder of said second portion defines an angle of between about 50* and about 30* with the axis of said anti-extrusion ring.
Claim 7
Dependent Claim
21 words
An anti-extrusion ring as defined in claim 2 wherein the radial dimension of said first portion is at least 0.030 inches.
Claim 8
Dependent Claim
24 words
An anti-extrusion ring as defined in claim 2 wherein said anti-extrusion ring has an axial dimension slightly greater than the depth of said groove.
Claim 9
Dependent Claim
28 words
An anti-extrusion ring as defined in claim 7 wherein the axial dimension of said anti-extrusion ring is from 0.001 to 0.006 greater than the depth of said groove.
Claim 10
Dependent Claim
118 words
A static face seal assembly for use in sealing the clearance gap between a pair of radially extending surfaces, one of said surfaces having a groove formed therein, said groove being defined in part by an outer axially extending wall having a beveled edge, said static face seal assembly comprising an elastomeric seal ring disposed in said groove, a soft metal anti-extrusion ring having a first portion which defines an axially extending surface sized to fit in close conformity with said axially extending wall of said groove, and a second portion which defines an outwardly sloping shoulder adapted to engage said beveled edge; and a plastic backup ring interposed between said elastomeric seal ring and said aNti-extrusion ring.
Claim 11
Dependent Claim
118 words
A static face seal assembly for use in sealing the clearance gap between a pair of radially extending surfaces, one of said surfaces having a groove formed therein, said groove being defined in part by an outer axially extending wall having a beveled edge, said static face seal assembly comprising an elastomeric seal ring disposed in said groove, a soft metal anti-extrusion ring having a first portion which defines an axially extending surface sized to fit in close conformity with said axially extending wall of said groove, and a second portion which defines an outwardly sloping shoulder adapted to engage said beveled edge; and a plastic backup ring interposed between said elastomeric seal ring and said aNti-extrusion ring.
Claim 12
Dependent Claim
27 words
A static face seal assembly as defined in claim 9 wherein said anti-extrusion ring is composed of a metal having a Brinnel hardness less than about 100.
Claim 13
Dependent Claim
26 words
A static face seal assembly as defined in claim 10 wherein said anti-extrusion ring has an axial dimension slightly greater than the depth of said groove.
Claim 14
Dependent Claim
48 words
A static face seal assembly as defined in claim 10 wherein said elastomeric seal ring, said plastic backup ring, and said anti-extrusion ring are arranged concentrically within said groove, each ring being sized to protrude axially beyond said groove and adapted to engage the other of said surfaces.
Claim 15
Dependent Claim
18 words
A static face seal assembly as defined in claim 12 wherein said elastomeric seal ring is an O-ring.
Claim 16
Dependent Claim
30 words
A static face seal assembly as defined in claim 13 wherein said plastic backup ring substantially covers the inner wall of said anti-extrusion ring and is composed of a fluoroplastic.
References Cited (Backward Citations)
US1631654A
Cited
US3436085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |