Patent US3829106A successfully refreshed from Google Patents.
US3829106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure lip seal
Assignee: Crane Packing Co
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Filing: 1972-12-04
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Granted: 1974-08-13
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Expires: 1992-12-04
Abstract
Abstract The invention disclosed is a simple elastomeric ring used as a seal between a rotating shaft and a housing, said shaft and housing forming parts of a high pressure hydraulic system. The ring is shaped to have a flexible lip exposed to the fluid under pressure and held against the shaft by said fluid, and to form a groove adjacent the shaft, the groove being filled with a lubricant. Pressure to 2,500 p.s.i. can be taken by the ring so that the ring can in some instances replace high cost end face rotary mechanical seals normally used for such pressures.
Inventors
- 👤 E Wheelock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:16
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/324; F16J15/3204; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/936; Y10S277/944; Y10S277/945; Y10S277/946
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
A ring for effecting a fluid-tight seal between radially spaced concentric cylindrical surfaces on relatively rotatable machine elements, said ring comprising a torus of moldable flexible material adapted to be inserted into the annular spaced formed by said machine element surfaces and having one radially disposed side facing the fluid to be sealed and one cylindrical side facing said machine element cylindrical surface, a radially inwardly sloping lip extending from the corner region formed by said sides of the torus said lip having a lesser inside diameter than the torus, of the cylindrical surface of said one of said machine elements and formed with substantially a knife edge in contact with said cylindrical surface of one of said machine elements, said side of the torus facing one of said machine elements having a circumferential groove formed therein, and a paste-like lubricant in said groove.
Claim 2
Dependent Claim
144 words
A ring for effecting a fluid-tight seal between radially spaced concentric cylindrical surfaces on relatively rotatable machine elements, said ring comprising a torus of moldable flexible material adapted to be inserted into the annular spaced formed by said machine element surfaces and having one radially disposed side facing the fluid to be sealed and one cylindrical side facing said machine element cylindrical surface, a radially inwardly sloping lip extending from the corner region formed by said sides of the torus said lip having a lesser inside diameter than the torus, of the cylindrical surface of said one of said machine elements and formed with substantially a knife edge in contact with said cylindrical surface of one of said machine elements, said side of the torus facing one of said machine elements having a circumferential groove formed therein, and a paste-like lubricant in said groove.
Claim 3
Dependent Claim
42 words
A ring as described in claim 1, said ring having a recess formed in the region thereof bounded by the side facing the pressure and the side facing said one of said machine elements, and said lip being disposed in said recess.
Claim 4
Dependent Claim
84 words
A ring as described in claim 1, said knife edge in the lip being formed by the intersection of the inner surface of the lip and a radially outwardly sloping surface forming the inner end of the lip, said latter outwardly sloping surface providing a radially outwardly directed component of force of the fluid under pressure upon the knife edge tending to reduce the total radially inwardly directed force upon said lip and thereby reducing friction between said lip and said one machine element.
Claim 5
Dependent Claim
30 words
A ring as described in claim 1, said lip having a transverse thickness substantially equal to one-fourth of the radial dimension of the space between the said relatively rotatable elements.
Claim 6
Dependent Claim
43 words
A ring as described in claim 1, said ring having a generally rectangular radial cross section, the material of said ring being an elastomer of approximately 90 durometer hardness and said lubricant being a mixture of polytetrafluoroethylene particles and a viscous silicone vehicle.
Claim 7
Dependent Claim
44 words
A ring as described in claim 1, said ring having a generally rectangular radial Cross section with a substantially rectangular recess formed in the inner corner thereof facing the fluid under pressure, and said lip extending from a radially disposed surface of said recess.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |