US4121843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple convolution sealing ring
Assignee: EG&G Pressure Science Inc
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Filing: 1977-10-04
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Granted: 1978-10-24
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Expires: 1997-10-04
Abstract
Abstract There is disclosed a sealing ring comprising an integral piece of resilient metal formed into three or more U-shaped annular convolutions and having outer legs which extend from the convoluted section in a direction essentially parallel to but leading slightly away from the convolutions. The outer legs have a sinuous configuration and terminate in convex portions which define a sealing line when the sealing ring is installed.
Inventors
- 👤 Horace P. Halling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:59
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0887; F01; F01D; F01D11/00; F01D11/005; F16J15/021
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A sealing ring comprising an integral piece of resilient metal formed into at least three U-shaped annular convolutions including two end convolutions and at least one inner convolution between said end convolutions, the outermost parts of the end convolutions forming legs which extend in a direction essentially parallel to but leading slightly away from the center line of symmetry of the ring cross-section; said outer legs having a sinuous configuration and terminating in convex portions which define, at each side of the seal, a singular sealing line when the seal is installed.
Claim 2
Dependent Claim
92 words
A sealing ring comprising an integral piece of resilient metal formed into at least three U-shaped annular convolutions including two end convolutions and at least one inner convolution between said end convolutions, the outermost parts of the end convolutions forming legs which extend in a direction essentially parallel to but leading slightly away from the center line of symmetry of the ring cross-section; said outer legs having a sinuous configuration and terminating in convex portions which define, at each side of the seal, a singular sealing line when the seal is installed.
Claim 3
Dependent Claim
24 words
A sealing ring as defined in claim 1 wherein each of said outer legs comprises two convex portions joined together by a concave portion.
Claim 4
Dependent Claim
24 words
A sealing ring as defined in claim 1 wherein each of said outer legs comprises two convex portions joined together by a straight portion.
Claim 5
Dependent Claim
27 words
A sealing ring as defined in claim 1 comprising three of said convolutions and wherein said end convolutions are joined to said inner convolution by 180° bends.
Claim 6
Dependent Claim
35 words
A sealing ring as defined in claim 4 wherein said inner convolution has sides which are approximately equal to the length of the outer legs at said sealing line when the sealing ring is installed.
Claim 7
Dependent Claim
21 words
A sealing ring as defined in claim 5 wherein each of said convolutions has sides which are angled toward each other.
Claim 8
Dependent Claim
15 words
A sealing ring as defined in claim 1 which is designed to be externally pressurized.
Claim 9
Dependent Claim
15 words
A sealing ring as defined in claim 1 which is designed to be internally pressurized.
Claim 10
Dependent Claim
22 words
A sealing ring as defined in claim 1 wherein each of said outer legs comprises multiple concave and convex concentric annular waves.
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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) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |