Patent US2050652A successfully refreshed from Google Patents.
Patent US3094075A successfully refreshed from Google Patents.
US3094075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pumps
Assignee: Denver Equipment Co
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Filing: 1960-06-08
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Granted: 1963-06-18
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Expires: 1980-06-08
Abstract
No abstract record available.
Inventors
- 👤 Leland H Logue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:04
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2261; F04D29/2294; F04D29/08; F04D29/10; F04D29/106; F04D29/40; F04D29/42; F04D29/426; F04D29/4286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
IN A PUMP HAVING A BASE, A HOUSING MOUNTED ON SAID BASE AND HAVING AN AXAIL INLET, A TANGENTIAL OUTLET AND AN OPENING OPPOSITE SAID INLET, A ROTATABLE SHAFT EXTENDING THROUGH SAID OPENING IN SAID HOUSING OPPOSITE SAID INLET, AN IMPELLER MOUNTED ON THE END OF SAID SHAFT WITHIN SAID HOUSING AND ADAPTED TO PUMP LIQUID FROM SAID INLET TO SAID OUTLET AND HAVING MEANS FOR DRIVING FLUID AWAY FROM SAID SHAFT OPENING WHEN SAID SHAFT IS ROTATING, THE IMPROVEMENT WHICH COMPRISES A BLIND PLATE FORMING THE PERIPHERAL FACE OF SAID OPENING AND HAVING A SEALING SURFACE THEREON; SEALING MEANS OPERATIVE TO ENGAGE SAID SEALING SURFACE TO PREVENT LEAKAGE OF FLUID WITHIN SAID HOUSING THROUGH SAID SHAFT OPENING WHEN SAID SHAFT AND SAID IMPELLER ARE MOTIONLESS, BUT WHICH IS DISENGAGED FROM SAID SEALING SURFACE DURING ROTATION OF SAID SHAFT; MEANS FOR CAUSING SAID SEALING MEANS TO ENGAGE SAID HOUSING WHEN SAID SHAFT IS MOTIONLESS AND TO BE DISENGAGED FROM SAID HOUSING UPON ROTATION OF SAID SHAFT; AND MEANS FOR LONGUTUDINALLY ADJUSTING SAID SHAFT, SAID IMPELLER, SAID BLIND PLATE AND SAID SEALING MEANS TO ADJUST THE CLEARANCE BETWEEN SAID IMPELLER AND SAID INLET.
Claim 2
Dependent Claim
192 words
IN A PUMP HAVING A BASE, A HOUSING MOUNTED ON SAID BASE AND HAVING AN AXAIL INLET, A TANGENTIAL OUTLET AND AN OPENING OPPOSITE SAID INLET, A ROTATABLE SHAFT EXTENDING THROUGH SAID OPENING IN SAID HOUSING OPPOSITE SAID INLET, AN IMPELLER MOUNTED ON THE END OF SAID SHAFT WITHIN SAID HOUSING AND ADAPTED TO PUMP LIQUID FROM SAID INLET TO SAID OUTLET AND HAVING MEANS FOR DRIVING FLUID AWAY FROM SAID SHAFT OPENING WHEN SAID SHAFT IS ROTATING, THE IMPROVEMENT WHICH COMPRISES A BLIND PLATE FORMING THE PERIPHERAL FACE OF SAID OPENING AND HAVING A SEALING SURFACE THEREON; SEALING MEANS OPERATIVE TO ENGAGE SAID SEALING SURFACE TO PREVENT LEAKAGE OF FLUID WITHIN SAID HOUSING THROUGH SAID SHAFT OPENING WHEN SAID SHAFT AND SAID IMPELLER ARE MOTIONLESS, BUT WHICH IS DISENGAGED FROM SAID SEALING SURFACE DURING ROTATION OF SAID SHAFT; MEANS FOR CAUSING SAID SEALING MEANS TO ENGAGE SAID HOUSING WHEN SAID SHAFT IS MOTIONLESS AND TO BE DISENGAGED FROM SAID HOUSING UPON ROTATION OF SAID SHAFT; AND MEANS FOR LONGUTUDINALLY ADJUSTING SAID SHAFT, SAID IMPELLER, SAID BLIND PLATE AND SAID SEALING MEANS TO ADJUST THE CLEARANCE BETWEEN SAID IMPELLER AND SAID INLET.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |