US3403916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loading systems for rotary face seals
Assignee: Caterpillar Inc
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Filing: 1966-03-18
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Granted: 1968-10-01
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Expires: 1986-03-18
Abstract
No abstract record available.
Inventors
- 👤 Donald F Durham
- 👤 Donald D Necessary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:51
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/344; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A FACE SEAL FOR THE JOURNAL BOX OF A RAILROAD CAR EFFECTIVE TO MAINTAIN FLUID SEALING CONTACT BETWEEN THE SEAL FACES DURING LATERAL MOVEMENT OF THE JOURNAL WITHIN THE JOURNAL BOX AND COMPRISING, A METAL SEAL RING MOUNTED FOR ROTATION WITH THE JOURNAL AND HAVING A FIRST RADIALLY EXTENDING SEAL FACE, A NONROTATABLE METAL SEAL RING MOUNTED IN THE JOURNAL BOX AND HAVING A SECOND RADIALLY EXTENDING SEAL FACE, SAID FIRST AND SECOND SEAL FACES BEING IN ENGAGEMENT, AND A GENERALLY AXIALLY EXTENDING INCLINED SURFACE ON THE BACK SIDE OF EACH SAID SEAL RING, A RESILIENT O-RING ENGAGED WITH THE INCLINED SURFACE OF EACH SAID SEAL RING, A RING RETAINER ON EACH OF SAID JOURNAL AND JOURNAL BOX, EACH OF SAID RETAINERS HAVING GENERALLY LATERALLY EXTENDING INCLINED RETAINER SURFACES, ADDITIONAL RESILIENT O-RINGS ENGAGED WITH SAID RETAINER SURFACES, AND ADAPTER ELEMENTS MOUNTED FOR LATERAL MOVEMENT WITHIN THE RE-
Claim 2
Dependent Claim
147 words
A FACE SEAL FOR THE JOURNAL BOX OF A RAILROAD CAR EFFECTIVE TO MAINTAIN FLUID SEALING CONTACT BETWEEN THE SEAL FACES DURING LATERAL MOVEMENT OF THE JOURNAL WITHIN THE JOURNAL BOX AND COMPRISING, A METAL SEAL RING MOUNTED FOR ROTATION WITH THE JOURNAL AND HAVING A FIRST RADIALLY EXTENDING SEAL FACE, A NONROTATABLE METAL SEAL RING MOUNTED IN THE JOURNAL BOX AND HAVING A SECOND RADIALLY EXTENDING SEAL FACE, SAID FIRST AND SECOND SEAL FACES BEING IN ENGAGEMENT, AND A GENERALLY AXIALLY EXTENDING INCLINED SURFACE ON THE BACK SIDE OF EACH SAID SEAL RING, A RESILIENT O-RING ENGAGED WITH THE INCLINED SURFACE OF EACH SAID SEAL RING, A RING RETAINER ON EACH OF SAID JOURNAL AND JOURNAL BOX, EACH OF SAID RETAINERS HAVING GENERALLY LATERALLY EXTENDING INCLINED RETAINER SURFACES, ADDITIONAL RESILIENT O-RINGS ENGAGED WITH SAID RETAINER SURFACES, AND ADAPTER ELEMENTS MOUNTED FOR LATERAL MOVEMENT WITHIN THE RE-
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) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |