US4026563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil seal with locking bead and O. D. sealing rib
Assignee: SKF USA Inc
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Filing: 1976-03-23
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Granted: 1977-05-31
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Expires: 1996-03-23
Abstract
Abstract An oil seal and the combination of a housing bore with the oil seal, the oil seal including an annular locking bead and annular O.D. sealing ribs, for use in applications where a minimum of radial force may be exerted by the seal on the bore and where the oil seal must be positively retained in the bore. The O.D. sealing ribs provide sufficient interference fit with the bore to effect a seal, but insufficient to retain the oil seal in the bore. The locking bead positively retains the oil seal in the bore.
Inventors
- 👤 Dean R. Bainard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:17
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3268; F16J15/3276
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
223 words
In a method for positively retaining a seal in a housing bore in sealing contact with the bore, against which bore only a minimum of radially outwardly directed force may be exerted, the improvement comprising the steps of: (a) providing an oil seal comprising an annular shell and an elastomeric sealing element bonded to the shell and having at least one annular O.D. sealing rib and also an annular locking bead extending axially inwardly beyond an axially inner end of the shell and having an O.D. greater than the O.D. of said at least one sealing rib, the locking bead having a locking shoulder for engaging a mating shoulder in a retaining groove in the I.D. of said bore, (b) forming the O.D, of said at least one annular O.D. sealing rib so as to contact said bore with sufficient force to provide a fluid seal but with insufficient force to positively retain said seal in said bore, and (c) controlling the force exerted on said bore by said locking bead during installation, said controlling step including locating the axially inner end of said shell at a predetermined position with respect to said locking bead to keep the outward force exerted on said bore by said locking bead during installation no greater than that exerted by said at least one O.D. sealing rib.
Claim 2
Dependent Claim
223 words
In a method for positively retaining a seal in a housing bore in sealing contact with the bore, against which bore only a minimum of radially outwardly directed force may be exerted, the improvement comprising the steps of: (a) providing an oil seal comprising an annular shell and an elastomeric sealing element bonded to the shell and having at least one annular O.D. sealing rib and also an annular locking bead extending axially inwardly beyond an axially inner end of the shell and having an O.D. greater than the O.D. of said at least one sealing rib, the locking bead having a locking shoulder for engaging a mating shoulder in a retaining groove in the I.D. of said bore, (b) forming the O.D, of said at least one annular O.D. sealing rib so as to contact said bore with sufficient force to provide a fluid seal but with insufficient force to positively retain said seal in said bore, and (c) controlling the force exerted on said bore by said locking bead during installation, said controlling step including locating the axially inner end of said shell at a predetermined position with respect to said locking bead to keep the outward force exerted on said bore by said locking bead during installation no greater than that exerted by said at least one O.D. sealing rib.
Claim 3
Dependent Claim
34 words
The method according to claim 1 wherein said controlling step comprises positioning said axially inner end of said shell at approximately the same axial position as that of said shoulder of said locking bead.
Claim 4
Dependent Claim
37 words
The method according to claim 1 wherein said controlling step further includes moving said locking bead, during installation, radially inwardly away from said bore at a position axially inwardly from the axially inner end of said shell.
Claim 5
Dependent Claim
101 words
In an oil seal to be installed in a housing bore against which only a minimum of radially outwardly directed force may be exerted, and comprising an annular shell and an elastomeric sealing element bonded to said shell and having at least one annular O.D. sealing rib and annular locking bead including a locking shoulder, said bead extending axially inwardly beyond an axially inner end of said shell, the improvement comprising means for controlling the force exerted on said bore by said locking bead during installation, said means including said shell being located for a predetermined length behind said locking bead.
Claim 6
Dependent Claim
101 words
In an oil seal to be installed in a housing bore against which only a minimum of radially outwardly directed force may be exerted, and comprising an annular shell and an elastomeric sealing element bonded to said shell and having at least one annular O.D. sealing rib and annular locking bead including a locking shoulder, said bead extending axially inwardly beyond an axially inner end of said shell, the improvement comprising means for controlling the force exerted on said bore by said locking bead during installation, said means including said shell being located for a predetermined length behind said locking bead.
Claim 7
Dependent Claim
31 words
The seal according to claim 4 wherein said axially inner end of said shell is located at approximately the same axial position as that of said shoulder of said locking bead.
References Cited (Backward Citations)
US2834616A
Cited
US3866925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |