US3179422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-compensating shaft seal
Assignee: Ingersoll Rand Co
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Filing: 1962-04-10
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Granted: 1965-04-20
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Expires: 1982-04-10
Abstract
No abstract record available.
Inventors
- 👤 David E Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:34
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38; F16J15/002; F16J15/006; Y; Y10; Y10S; Y10S277/00; Y10S277/927; Y10S277/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PUMP SEALING DEVICE FOR REDUCING THE PRESSURE OF LEAKAGE FLUID IN STAGES COMPRISING A HOUSING MEMBER, A ROTATABLE SHAFT, COLLARS ROTATABLE WITH SAID SHAFT, NONROTATING SEALING RINGS ADJACENT SAID COLLARS, SAID SEALING RINGS BEING CAPABLE OF AXIAL MOVEMENT RELATIVE TO THE COLLARS, SAID COLLARS AND SEALING RINGS HAVING SURFACES IN CLOSE PROXIMITY TO ONE ANOTHER TO PROVIDE A RESTRICTION FOR FLUID FLOW, VENTING CHAMBERS DEFINED AT LEAST IN PART BY SURFACES OF THE HOUSING MEMBER AND PRESSURE SURFACES ON THE SEALING RINGS, AND MEANS FOR SUPPLYING A CONTROL FLUID TO THE VENTING CHAMBERS, SAID MEANS BEING
Claim 2
Dependent Claim
97 words
A PUMP SEALING DEVICE FOR REDUCING THE PRESSURE OF LEAKAGE FLUID IN STAGES COMPRISING A HOUSING MEMBER, A ROTATABLE SHAFT, COLLARS ROTATABLE WITH SAID SHAFT, NONROTATING SEALING RINGS ADJACENT SAID COLLARS, SAID SEALING RINGS BEING CAPABLE OF AXIAL MOVEMENT RELATIVE TO THE COLLARS, SAID COLLARS AND SEALING RINGS HAVING SURFACES IN CLOSE PROXIMITY TO ONE ANOTHER TO PROVIDE A RESTRICTION FOR FLUID FLOW, VENTING CHAMBERS DEFINED AT LEAST IN PART BY SURFACES OF THE HOUSING MEMBER AND PRESSURE SURFACES ON THE SEALING RINGS, AND MEANS FOR SUPPLYING A CONTROL FLUID TO THE VENTING CHAMBERS, SAID MEANS BEING
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |