US3841723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway bearing seal
Assignee: Motors Liquidation Co
•
Filing: 1973-05-22
•
Granted: 1974-10-15
•
Expires: 1993-05-22
Abstract
Abstract A seal assembly for a railway journal bearing includes an outer case attached to the bearing outer race and a replaceable inner case carrying an elastomeric sealing element. The sealing element is bonded to an annular rim on the inner case and has a seal lip adjacent the rim engageable with the journalled shaft and a cantilevered flexible section including a dust lip compressively engaging an annular rim on the outer case. A garter spring radially inwardly biases the seal lip against the shaft and the free end of the flexible section against the rim to radially support the dust lip and prevent excessive dust lip pressure.
Inventors
- 👤 A Kelso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:30
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456; F16C; F16C33/00; F16C33/72; F16C33/76; F16C33/78; F16C33/7803; F16C33/7813; F16J15/32; F16J15/3204; F16J15/3232; F16J15/3236; F16J15/3248; F16J15/3252; F16C19/00; F16C19/22; F16C19/34; F16C19/38; F16C19/383; F16C19/385; F16C19/386; F16C2326/00; F16C2326/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
340 words
In a railway journal box bearing assembly having an outer race mounted on said journal box, an inner race mounted on a rotatable shaft, antifriction elements between said races, and a sealing ring having an opening for conveying lubricant toward said elements mounted on the shaft, a seal comprising: an outer case having an axially extending cylindrical sleeve section connected at one end to the outer race and terminating at the other end with a radially inwardly extending annular rim; a replaceable inner case having an elastomeric sealing element, said inner case having an axially extending sleeve section releasably engaging the inner surface of said sleeve section of said outer case and engaging said rim of said outer case; a radially inwardly extending annular rim on said inner case axially spaced in assembly from said annular rim of said outer case to define an inwardly opening annular channel, a pair of converging frustoconical walls formed on the inner surface of said sealing element adjacent said rim, said surfaces defining a seal lip engageable with said sealing ring outboard of said opening therein, a projecting cantilevered flexible section extending from said seal lip terminating at the other end with an annular heel compressively engaging said rim of said outer case to fixedly position the other end of said sealing element, an annular spring retaining groove in the outer surface of said sealing element substantially axially aligned with said seal lip, a helically coiled spring retained in said retaining groove for radially inwardly biasing the seal lip against said sealing ring to establish a sealing interface for retaining lubricant at the biasing elements, said spring axially biasing said heel against said rim of said outer case, an annular dust lip formed on the inner surface of the element adjacent said other end, said dust lip having an interference fit with said other member, the engagement of said heel and said rim radially supporting said other end of said sealing element to isolate the dust lip from the resultant force of the spring.
Claim 2
Dependent Claim
340 words
In a railway journal box bearing assembly having an outer race mounted on said journal box, an inner race mounted on a rotatable shaft, antifriction elements between said races, and a sealing ring having an opening for conveying lubricant toward said elements mounted on the shaft, a seal comprising: an outer case having an axially extending cylindrical sleeve section connected at one end to the outer race and terminating at the other end with a radially inwardly extending annular rim; a replaceable inner case having an elastomeric sealing element, said inner case having an axially extending sleeve section releasably engaging the inner surface of said sleeve section of said outer case and engaging said rim of said outer case; a radially inwardly extending annular rim on said inner case axially spaced in assembly from said annular rim of said outer case to define an inwardly opening annular channel, a pair of converging frustoconical walls formed on the inner surface of said sealing element adjacent said rim, said surfaces defining a seal lip engageable with said sealing ring outboard of said opening therein, a projecting cantilevered flexible section extending from said seal lip terminating at the other end with an annular heel compressively engaging said rim of said outer case to fixedly position the other end of said sealing element, an annular spring retaining groove in the outer surface of said sealing element substantially axially aligned with said seal lip, a helically coiled spring retained in said retaining groove for radially inwardly biasing the seal lip against said sealing ring to establish a sealing interface for retaining lubricant at the biasing elements, said spring axially biasing said heel against said rim of said outer case, an annular dust lip formed on the inner surface of the element adjacent said other end, said dust lip having an interference fit with said other member, the engagement of said heel and said rim radially supporting said other end of said sealing element to isolate the dust lip from the resultant force of the spring.
References Cited (Backward Citations)
US3472519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |