US3774920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring system
Assignee: —
•
Filing: 1972-07-12
•
Granted: 1973-11-27
•
Expires: 1992-07-12
Abstract
Abstract A multiple element seal ring system for fluid actuators comprising first and second resiliently yieldable dynamic sealing elements and a resiliently yieldable static sealing element, the last being of a material having a lower durometer rating than the first two. Each of the three sealing elements consists of an endless annular body for maintaining the seal ring system in a true round condition at all times.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:48
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3268
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
A seal ring assembly comprising: a first annular sealing element and a second annular sealing element disposed in axial abutting relation and adapted to be captively retained in a peripheral groove formed in a member relatively reciprocable in a tubular member; the axial ends of said sealing elements which are in non abutting relationship having axially outwardly facing flanges defining cavities therebetween, one of said flanges having an inclined outer wall portion terminating in an annular sealing lip having an interference fit with said inner wall surface of said tubular member; said first and second sealing elements having portions, respectively, in sealing engagement with the inner wall surface of said tubular member; said sealing elements having inner recesses defining a composite groove; a third sealing element received in said composite groove and having portions in sealing engagement with the peripheral groove bottom wall and with said first and second sealing elements; said first, second, and third sealing elements each having an endless annular body maintaining said seal ring assembly in a ture rounded condition.
Claim 2
Dependent Claim
174 words
A seal ring assembly comprising: a first annular sealing element and a second annular sealing element disposed in axial abutting relation and adapted to be captively retained in a peripheral groove formed in a member relatively reciprocable in a tubular member; the axial ends of said sealing elements which are in non abutting relationship having axially outwardly facing flanges defining cavities therebetween, one of said flanges having an inclined outer wall portion terminating in an annular sealing lip having an interference fit with said inner wall surface of said tubular member; said first and second sealing elements having portions, respectively, in sealing engagement with the inner wall surface of said tubular member; said sealing elements having inner recesses defining a composite groove; a third sealing element received in said composite groove and having portions in sealing engagement with the peripheral groove bottom wall and with said first and second sealing elements; said first, second, and third sealing elements each having an endless annular body maintaining said seal ring assembly in a ture rounded condition.
Claim 3
Dependent Claim
148 words
A seal ring assembly according to claim 1 wherein said first and second elements are formed of a resiliently yieldable material and said third sealing element is formed of a relatively soft resiliently yieldable material of a lower durometer rating than said first and second sealing elements; each of said first and second sealing element bodies being provided with an inner surface of parallel tothe axis of said body; each of said inner recesses of said first and second sealing elements being defined by a surface extending inwardly of said planar axial end face and concentric with said body inner surface and an inclined surface extending from the inner end of said inwardly extending surface inwardly to said body inner surface; said third sealing element having portions, respectively, in sealing engagement with said inwardly extending surfaces and said inclined surfaces of said first and second sealing elements, respectively.
Claim 4
Dependent Claim
97 words
A seal ring assembly according to claim 1 wherein each of said first and second sealing element bodies is provided with an inner surface parallel to the axis of said body and a planar axial end face extending normal to the axis of said body; each of said inner recesses of said first and second sealing elements being defined by a surface extending inwardly of said planar axial end face and concentric with said body inner surface and an inclined surface extending from the inner end of said inwardly extending surface inwardly to said body inner surface.
Claim 5
Dependent Claim
36 words
A seal ring assembly according to claim 3 wherein said third sealing element has portions, respectively, in sealing engagement with said inwardly extending surfaces and said inclined surfaces of said first and second sealing elements, respectively.
Claim 6
Dependent Claim
48 words
A seal ring assembly according to claim 1 wherein said first and second sealing elements are formed of a resiliently yieldAble material and said third sealing element is formed of a relatively soft resiliently yieldable material of a lower durometer rating than said first and second sealing elements.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |