US3713659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for relatively rotatable parts
Assignee: Forsheda Gummifabrik AB
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Filing: 1970-08-21
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Granted: 1973-01-30
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Expires: 1990-08-21
Abstract
Abstract A seal for two relatively rotatable parts of the type wherein a rotary shaft projects through a bearing housing wall that is disposed transversely to the shaft comprising an annular sealing member consisting of a resilient ring having a tubular body portion and an integral annular thin flexible lip projecting from one end thereof. The annular lip is defined at its inner end adjacent the body portion by an annular separation and has an outer wall constituted by an inwardly directed surface of revolution having a base angle of between 30* and 60* facing and normally bearing against the housing wall around the opening to seal the same. The ring body when unstretched has a smaller inner diameter than the outer diameter of the shaft and the body portion has a mass at least twice the mass of the lip to provide in combination with the smaller inner diameter the sole means for fixedly securing the ring against axial and rotational displacement on the shaft in position to cause the flexible lip to bear against the housing wall and seal the opening. The outer axial end face of the lip is provided with a spiral groove which produces a pumping effect upon rotation urging the lubricant radially outwardly toward the area of engagement of the lip and the wall of the bearing housing.
Inventors
- 👤 K Derman
- 👤 S Malmstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:28
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0053; B29C; B29C69/00; F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456; B29L; B29L2031/00; B29L2031/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
257 words
A seal consisting essentially of resilient flexible material for two relatively rotatable parts of the class wherein a rotary shaft projects through an opening in a housing wall that is disposed transversely of said shaft, consisting of a resilient ring having a generally cylindrical tubular body portion and an integral annular thin flexible lip connected by a hinge at one axial end face of said body portion adjacent its inner peripheral surface, said annular lip extending outwardly radially and axially away from said body portion, the axially outer face of said lip being conical and displsed at an angle between 30* and 60* to the axis of said ring for normally bearing against said housing wall around the opening therein to seal said opening, the other axial end face of said body portion remote from said sealing lip lying in a plane angularly disposed to a plane perpendicular to the central axis of the body portion, said sealing lip radial projecting to an extent at least equal to the maximum radial dimension of said body portion, said ring body when unstretched having a smaller inner diameter than the outer diameter of said shaft to cause the ring to tightly grip the shaft and said body having a mass at least about twice the mass of said lip to provide in combination with said smaller inner diameter the sole means for fixedly securing the ring against axial displacement on the shaft in position to cause the flexible lip to bear against the housing wall and seal said opening.
Claim 2
Dependent Claim
257 words
A seal consisting essentially of resilient flexible material for two relatively rotatable parts of the class wherein a rotary shaft projects through an opening in a housing wall that is disposed transversely of said shaft, consisting of a resilient ring having a generally cylindrical tubular body portion and an integral annular thin flexible lip connected by a hinge at one axial end face of said body portion adjacent its inner peripheral surface, said annular lip extending outwardly radially and axially away from said body portion, the axially outer face of said lip being conical and displsed at an angle between 30* and 60* to the axis of said ring for normally bearing against said housing wall around the opening therein to seal said opening, the other axial end face of said body portion remote from said sealing lip lying in a plane angularly disposed to a plane perpendicular to the central axis of the body portion, said sealing lip radial projecting to an extent at least equal to the maximum radial dimension of said body portion, said ring body when unstretched having a smaller inner diameter than the outer diameter of said shaft to cause the ring to tightly grip the shaft and said body having a mass at least about twice the mass of said lip to provide in combination with said smaller inner diameter the sole means for fixedly securing the ring against axial displacement on the shaft in position to cause the flexible lip to bear against the housing wall and seal said opening.
Claim 3
Dependent Claim
257 words
A seal consisting essentially of resilient flexible material for two relatively rotatable parts of the class wherein a rotary shaft projects through an opening in a housing wall that is disposed transversely of said shaft, consisting of a resilient ring having a generally cylindrical tubular body portion and an integral annular thin flexible lip connected by a hinge at one axial end face of said body portion adjacent its inner peripheral surface, said annular lip extending outwardly radially and axially away from said body portion, the axially outer face of said lip being conical and displsed at an angle between 30* and 60* to the axis of said ring for normally bearing against said housing wall around the opening therein to seal said opening, the other axial end face of said body portion remote from said sealing lip lying in a plane angularly disposed to a plane perpendicular to the central axis of the body portion, said sealing lip radial projecting to an extent at least equal to the maximum radial dimension of said body portion, said ring body when unstretched having a smaller inner diameter than the outer diameter of said shaft to cause the ring to tightly grip the shaft and said body having a mass at least about twice the mass of said lip to provide in combination with said smaller inner diameter the sole means for fixedly securing the ring against axial displacement on the shaft in position to cause the flexible lip to bear against the housing wall and seal said opening.
Claim 4
Dependent Claim
257 words
A seal consisting essentially of resilient flexible material for two relatively rotatable parts of the class wherein a rotary shaft projects through an opening in a housing wall that is disposed transversely of said shaft, consisting of a resilient ring having a generally cylindrical tubular body portion and an integral annular thin flexible lip connected by a hinge at one axial end face of said body portion adjacent its inner peripheral surface, said annular lip extending outwardly radially and axially away from said body portion, the axially outer face of said lip being conical and displsed at an angle between 30* and 60* to the axis of said ring for normally bearing against said housing wall around the opening therein to seal said opening, the other axial end face of said body portion remote from said sealing lip lying in a plane angularly disposed to a plane perpendicular to the central axis of the body portion, said sealing lip radial projecting to an extent at least equal to the maximum radial dimension of said body portion, said ring body when unstretched having a smaller inner diameter than the outer diameter of said shaft to cause the ring to tightly grip the shaft and said body having a mass at least about twice the mass of said lip to provide in combination with said smaller inner diameter the sole means for fixedly securing the ring against axial displacement on the shaft in position to cause the flexible lip to bear against the housing wall and seal said opening.
Claim 5
Dependent Claim
29 words
A seal as claimed in claim 1 wherein the end of said sealing lip is defined by a cylindrical surface concentric with the central axis of the resilient ring.
Claim 6
Dependent Claim
32 words
A seal as claimed in claim 1 wherein said annular separation between said lip and body portion comprises a radially extending slit disposed perpendicularly to the central axis of said resilient ring.
Claim 7
Dependent Claim
23 words
A seal as claimed in claim 1 wherein the annular separation between said lip and body portion comprises a circumferentially extending V-shaped groove.
Claim 8
Dependent Claim
232 words
In combination with a rotary shaft which projects through a bearing housing wall disposed transversely of the shaft, said shaft having a circumferentially extending groove therein, an annular sealing member consisting of a resilient ring having a generally cylindrical tubular body portion and an integral annular flexible lip projecting from one end thereof, said sealing member adapted to be mounted on said shaft with the juncture of said lip and body portion overlying said annular groove in said shaft to cause said lip to be deflected outwardly from said body portion to engage said bearing housing wall, said annular lip being defined at its inner end adjacent the body portion by an annular separation and having an outer wall constituted by an inwardly directed surface of revolution having a base angle between 30* and 60* facing and normally bearing against said housing wall around the opening therein to seal said opening, said ring body when unstretched having a smaller inner diameter than the outer diameter of said shaft to cause the ring to tightly grip the shaft and said body having a mass at least about twice the mass of said lip to provide in combination with said smaller inner diameter the sole means for fixedly securing the ring against axial displacement on the shaft in position to cause the flexible lip to bear against the housing wall and seal said opening.
Claim 9
Dependent Claim
232 words
In combination with a rotary shaft which projects through a bearing housing wall disposed transversely of the shaft, said shaft having a circumferentially extending groove therein, an annular sealing member consisting of a resilient ring having a generally cylindrical tubular body portion and an integral annular flexible lip projecting from one end thereof, said sealing member adapted to be mounted on said shaft with the juncture of said lip and body portion overlying said annular groove in said shaft to cause said lip to be deflected outwardly from said body portion to engage said bearing housing wall, said annular lip being defined at its inner end adjacent the body portion by an annular separation and having an outer wall constituted by an inwardly directed surface of revolution having a base angle between 30* and 60* facing and normally bearing against said housing wall around the opening therein to seal said opening, said ring body when unstretched having a smaller inner diameter than the outer diameter of said shaft to cause the ring to tightly grip the shaft and said body having a mass at least about twice the mass of said lip to provide in combination with said smaller inner diameter the sole means for fixedly securing the ring against axial displacement on the shaft in position to cause the flexible lip to bear against the housing wall and seal said opening.
Claim 10
Dependent Claim
26 words
The combination as claimed in claim 5 wherein said annular separation comprises a radially extending slit disposed perpendicular to the central axis of said resilient ring.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |