US3771801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device
Assignee: Greene Tweed of Delaware Inc
•
Filing: 1972-06-05
•
Granted: 1973-11-13
•
Expires: 1992-06-05
Abstract
Abstract A double acting sealing assembly including a modified T-shaped sealing ring and mating substantially trapezoidal shaped back-up rings or anti-extrusion rings are provided. An annular void is provided at the static surface of the sealing ring. The sealing surface of the ring is formed by converging end faces which meet at a sharp sealing edge. In an alternative embodiment, the void may be filled with a material different from that of the sealing ring.
Inventors
- 👤 J Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:44
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/166; F16J15/32; Y; Y10; Y10S; Y10S277/00; Y10S277/915; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
A sealing device comprising an annular T-shaped cross-section sealing ring of elastomeric material, said ring having axially extending legs and convering side faces merging into converging end faces, said end faces meeting to define a sharp sealing edge, a complementary mating anti-extrusion ring juxtaposed to each side face and the adjacent leg, said anti-extrusion rings being generally trapezoidal in section and have a radial dimension corresponding generally to but not substantially greater than the height of said converging side faces, and said sealing ring having a void on the peripheral surface opposite said sealing edge.
Claim 2
Dependent Claim
95 words
A sealing device comprising an annular T-shaped cross-section sealing ring of elastomeric material, said ring having axially extending legs and convering side faces merging into converging end faces, said end faces meeting to define a sharp sealing edge, a complementary mating anti-extrusion ring juxtaposed to each side face and the adjacent leg, said anti-extrusion rings being generally trapezoidal in section and have a radial dimension corresponding generally to but not substantially greater than the height of said converging side faces, and said sealing ring having a void on the peripheral surface opposite said sealing edge.
Claim 3
Dependent Claim
19 words
A sealing device in accordance with claim 1 wherein said void is shallower than the thickness of said legs.
Claim 4
Dependent Claim
19 words
A sealing device in accordance with claim 1 wherein said void is deeper than the thickness of said legs.
Claim 5
Dependent Claim
34 words
A sealing device in accordance with claim 3 including a core in said void, said core being made from a material which is of a different hardness than the material of said sealing ring.
Claim 6
Dependent Claim
28 words
A sealing device in accordance with claim 1 wherein said sealing ring is a nitrile rubber, and said anti-extrusion rings being made from a material which is self-lubricating.
Claim 7
Dependent Claim
128 words
Apparatus comprising a sealing device for sealing the annular clearance between opposed surfaces on first and second interfitting members, said first member having an annular groove receiving said sealing device, said second member having a cylindrical surface opposed to said groove, said sealing device including an annular T-shaped cross-section sealing ring of elastomeric material, said ring having axially extending legs and converging side faces merging into converging end faces, said end faces meeting to define a centrally disposed sharp sealing edge in contact with said cylindrical surface, a complementary mating anti-extrusion ring juxtaposed to each side face and the adjacent leg, and said sealing ring having a void on the peripheral surface thereof which is juxtaposed to the groove and opposite the peripheral surface containing said sealing edge.
Claim 8
Dependent Claim
128 words
Apparatus comprising a sealing device for sealing the annular clearance between opposed surfaces on first and second interfitting members, said first member having an annular groove receiving said sealing device, said second member having a cylindrical surface opposed to said groove, said sealing device including an annular T-shaped cross-section sealing ring of elastomeric material, said ring having axially extending legs and converging side faces merging into converging end faces, said end faces meeting to define a centrally disposed sharp sealing edge in contact with said cylindrical surface, a complementary mating anti-extrusion ring juxtaposed to each side face and the adjacent leg, and said sealing ring having a void on the peripheral surface thereof which is juxtaposed to the groove and opposite the peripheral surface containing said sealing edge.
Claim 9
Dependent Claim
43 words
Apparatus in accordance with claim 6 wherein each anti-extrusion ring has a height corresponding to the distance between said legs and the intersection of a side face with the end face sO as to be spaced from said second member under static conditions.
Claim 10
Dependent Claim
29 words
Apparatus in accordance with claim 6 wherein each anti-extrusion ring is in sealing contact with a side face of said sealing ring and a side wall of said groove.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |