US3685838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal between two parts, one of which is rotatable in relation to the other
Assignee: Forsheda Gummifabrik AB
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Filing: 1969-11-21
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Granted: 1972-08-22
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Expires: 1989-11-21
Abstract
Abstract A seal for at least a pair of relatively rotatable members for preventing lubricant from leaking from a lubricant chamber to the space outside the lubricant chamber comprising a first seal element having a sealing portion mounted on the rotatable member and adapted to bear against a contact surface on the other member to form a primary seal area supporting the lubricant chamber from the space outside the lubricant chamber characterized by the first seal element mounted on the rotatable member having a bore therein forming a duct connecting the lubricant chamber with the space outside the lubricant chamber, said bore being located radially to one side of the primary seal area so that lubricant bypassing the primary seal area will be discharged through the bore to the lubricant chamber under the influence of centrifugal force.
Inventors
- 👤 Sven Erik Malmstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:27
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/162; F16J15/32; F16J15/324; F16C; F16C33/00; F16C33/72; F16C33/76
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
133 words
A seal adapted to be mounted between a shaft member engageable in a housing member, the members being mounted for relative rotation, comprising a first seal element mounted on one of said members, a second seal element, said sealing elements combining to define a lubricant chamber and another chamber connected at its radially outermost portion to said lubricant chamber, at least a portion of said lubricant chamber being disposed radially outwardly of said other chamber, said chambers being connected by a bore of a size which is larger than about 0.5 millimeters and less than bout 4 millimeters in cross section whereby lubricant from said lubricant chambers which may bypass said seal elements to said other chamber will be discharged through said bore to said lubricant chamber under the influence of centrifugal force.
Claim 2
Dependent Claim
133 words
A seal adapted to be mounted between a shaft member engageable in a housing member, the members being mounted for relative rotation, comprising a first seal element mounted on one of said members, a second seal element, said sealing elements combining to define a lubricant chamber and another chamber connected at its radially outermost portion to said lubricant chamber, at least a portion of said lubricant chamber being disposed radially outwardly of said other chamber, said chambers being connected by a bore of a size which is larger than about 0.5 millimeters and less than bout 4 millimeters in cross section whereby lubricant from said lubricant chambers which may bypass said seal elements to said other chamber will be discharged through said bore to said lubricant chamber under the influence of centrifugal force.
Claim 3
Dependent Claim
80 words
A seal as claimed in claim 1 wherein said seal is a resilient member mounted in the housing having a radial lip comprising one of said seal elements engaging the shaft and an offset lip comprising the other seal element projecting angularly from said radial lip having a sealing edge engaging the shaft at an area axially removed from said radial lip and defining therebetween the other chamber and wherein said bore is disposed in one of said seal elements.
Claim 4
Dependent Claim
22 words
A seal as claimed in claim 2 including a coil spring maintaining one of said sealing edge in engagement with the shaft.
Claim 5
Dependent Claim
61 words
A seal as claimed in claim 1 wherein said first seal element comprises a resilient member mounted in the housing having a sealing lip engaging the shaft and said second seal element comprises a metallic ring mounted on said shaft engaging said first seal element to define therebetween the other chamber and wherein said bore is disposed in said metallic ring.
Claim 6
Dependent Claim
27 words
A seal as claimed in claim 4 wherein said metallic ring includes two funnel-shaped portions and said bore is disposed at the apex between said funnel-shaped portions.
Claim 7
Dependent Claim
30 words
A seal as claimed in claim 4 wherein said second sealing element comprises a metallic ring of zig-zag cross section and including a plurality of bores in said metallic ring.
Claim 8
Dependent Claim
72 words
A seal as claimed in claim 4 wherein said first seal comprises a resilient ring member having a first lip engaging the shaft and a second radially inwardly directed lip portion and wherein said second seal element comprises a metallic ring mounted on the shaft having a generally cylindrical portion engaging said sealing lip and formed to define said other chamber therebetween and wherein the bore is disposed in said metallic ring.
Claim 9
Dependent Claim
70 words
A seal as claimed in claim 1 wherein said first seal elements consists of a profiled sheet metal ring mounted in the housing having a cylindrical surface spaced from the shaft and said second seal element comprises a resilient rubber ring mounted on the shaft having a sealing lip engaging said cylindrical surface and wherein said bore is disposEd at the juncture of said sealing lip and said sealing ring.
Claim 10
Dependent Claim
81 words
A seal as claimed in claim 1 including a pair of rubber rings mounted in the housing and on the shaft respectively radially spaced apart to define an annular space therebetween, and wherein each of said rings is provided with at least one circumferentially extending groove and wherein said second seal element comprises at least one metallic ring engaging in the grooves of the rings, said bore being disposed in said metallic ring in the annular space between said resilient rings.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |