US3642335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed bearing
Assignee: NSK Ltd
•
Filing: 1970-09-11
•
Granted: 1972-02-15
•
Expires: 1990-09-11
Abstract
Abstract A sealed ball or roller bearing which comprises a pair of seal plates interposed between an outer and inner race, the inner race having a seal groove of a substantially U- or L-shaped cross section formed in the outer surface thereof, each of the seal plates having its outer edge hermetically secured to the outer race, the inner edge portion of the seal plate being formed with an inner seal lip facing the seal groove of the inner race in spaced relationship therewith to provide a reduced clearance therebetween, an intermediate seal lip contacting the seal groove, and an outer seal lip out of contact with the seal groove to provide a labyrinth clearance therebetween, thus forming a seal portion of the bearing which is suitable for low-torque high-speed rotation.
Inventors
- 👤 Tadanobu Takahashi
- 👤 Yoshiro Kan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:45
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/72; F16C33/76; F16C33/78; F16C33/7816; F16C33/782; F16C33/784; F16C33/7843; F16C33/7853; F16C19/00; F16C19/02; F16C19/04; F16C19/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
208 words
A sealed ball or roller bearing comprising an outer and an inner race, and a pair of seal plates interposed between said outer and inner races, each of said seal plates having its outer edge hermetically secured to the inner surface of said outer race, the inner edge portion of said seal plate including an inner lip extending axially of the bearing, an intermediate lip extending obliquely inwardly of the bearing and an outer lip extending radially of the bearing, said inner race having substantially U-contoured seal grooves formed in the outer surface thereof along the opposite edges, each of said seal grooves being defined by a shoulder, a vertically extending sidewall contiguous to said shoulder, a flat bottom wall contiguous to said sidewall and a projected edge extended from said bottom wall, said inner lip of said seal plate being disposed in such a manner that the tip end thereof is in opposed and spaced relationship with said shoulder of said seal groove so as to provide a reduced clearance therebetween, said outer lip forming a labyrinth clearance with respect to said projected edge of said Seal groove, said intermediate lip being in contact with said sidewall of said seal groove to thereby form a seal portion.
Claim 2
Dependent Claim
208 words
A sealed ball or roller bearing comprising an outer and an inner race, and a pair of seal plates interposed between said outer and inner races, each of said seal plates having its outer edge hermetically secured to the inner surface of said outer race, the inner edge portion of said seal plate including an inner lip extending axially of the bearing, an intermediate lip extending obliquely inwardly of the bearing and an outer lip extending radially of the bearing, said inner race having substantially U-contoured seal grooves formed in the outer surface thereof along the opposite edges, each of said seal grooves being defined by a shoulder, a vertically extending sidewall contiguous to said shoulder, a flat bottom wall contiguous to said sidewall and a projected edge extended from said bottom wall, said inner lip of said seal plate being disposed in such a manner that the tip end thereof is in opposed and spaced relationship with said shoulder of said seal groove so as to provide a reduced clearance therebetween, said outer lip forming a labyrinth clearance with respect to said projected edge of said Seal groove, said intermediate lip being in contact with said sidewall of said seal groove to thereby form a seal portion.
Claim 3
Dependent Claim
197 words
A sealed ball or roller bearing comprising an outer and an inner race, and a pair of seal plates interposed between said outer and inner races, each of said seal plates having its outer edge hermetically secured to the inner surface of said outer race, the inner edge portion of said seal plate including an inner lip extending axially of the bearing, an intermediate lip extending obliquely inwardly of the bearing and an outer lip extending radially of the bearing, said inner race having substantially L-contoured seal grooves in the outer surface thereof along the opposite edges, each of said seal grooves being defined by a shoulder, a vertically extending sidewall contiguous to said shoulder and a steplike surface extending horizontally therefrom said inner lip of said seal plate being disposed in such a manner that the tip end thereof is in opposed and spaced relationship with said shoulder of said seal groove so as to provide a reduced clearance therebetween, said outer lip forming a labyrinth clearance with respect to said steplike surface of said seal groove, said intermediate lip being in contact with said sidewall of said seal groove to thereby form a seal portion.
Claim 4
Dependent Claim
197 words
A sealed ball or roller bearing comprising an outer and an inner race, and a pair of seal plates interposed between said outer and inner races, each of said seal plates having its outer edge hermetically secured to the inner surface of said outer race, the inner edge portion of said seal plate including an inner lip extending axially of the bearing, an intermediate lip extending obliquely inwardly of the bearing and an outer lip extending radially of the bearing, said inner race having substantially L-contoured seal grooves in the outer surface thereof along the opposite edges, each of said seal grooves being defined by a shoulder, a vertically extending sidewall contiguous to said shoulder and a steplike surface extending horizontally therefrom said inner lip of said seal plate being disposed in such a manner that the tip end thereof is in opposed and spaced relationship with said shoulder of said seal groove so as to provide a reduced clearance therebetween, said outer lip forming a labyrinth clearance with respect to said steplike surface of said seal groove, said intermediate lip being in contact with said sidewall of said seal groove to thereby form a seal portion.
Claim 5
Dependent Claim
29 words
A sealed bearing as defined in claim 1, wherein said intermediate lip of said seal plate has a reduced neck portion to provide a greater flexibility of that lip.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |