US3339490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump
Assignee: Allis Chalmers Corp
•
Filing: 1966-04-04
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Granted: 1967-09-05
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Expires: 1986-04-04
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Glass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:29
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2238; F04D29/2244; F04D7/00; F04D7/02; F04D7/04; F05; F05D; F05D2260/00; F05D2260/60; F05D2260/604
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A ROTARY PUMP COMPRISING FRONT AND REAR WALLS CONNECTED TOGETHER BY A CIRCUMFERENTIAL END WALL TO DEFINE A PUMPING CHAMBER, SAID END WALL HAVING A SINGLE CONTINUOUSLY SMOOTH INNER SURFACE, A PUMP IMPELLER SUPPORTED FOR ROTATION WITHIN SAID PUMPING CHAMBER, AN INLET OPENING THROUGH SAID FRONT WALL PERMITTING ACCESS OF FLUID TO BE PUMPED INTO SAID PUMPING CHAMBER, A DISCHARGE OPENING IN SAID END WALL PERMITTING FLUID TO EXHAUST FROM SAID PUMPING CHAMBER, AND A POCKET FORMED BY A CONTINUATION OF THE SINGLE CONTINUOUSLY SMOOTH INNER SURFACE OF SAID END WALL DEFINING AN ANNULAR CHAMBER IN SAID FRONT WALL TANGENT TO AND LOCATED ABOUT SAID INLET OPENING, SAID ANNULAR CHAMBER BEING OPEN TO SAID PUMPING CHAMBER WHEREBY A PORTION OF THE FLUID THEREIN ENTERS SAID ANNULAR CHAMBER AND IS REDIRECTED INTO SAID PUMPING CHAMBER TANGENTIALLY TO THE FLUID ENTERING SAID INLET OPENING.
Claim 2
Dependent Claim
142 words
A ROTARY PUMP COMPRISING FRONT AND REAR WALLS CONNECTED TOGETHER BY A CIRCUMFERENTIAL END WALL TO DEFINE A PUMPING CHAMBER, SAID END WALL HAVING A SINGLE CONTINUOUSLY SMOOTH INNER SURFACE, A PUMP IMPELLER SUPPORTED FOR ROTATION WITHIN SAID PUMPING CHAMBER, AN INLET OPENING THROUGH SAID FRONT WALL PERMITTING ACCESS OF FLUID TO BE PUMPED INTO SAID PUMPING CHAMBER, A DISCHARGE OPENING IN SAID END WALL PERMITTING FLUID TO EXHAUST FROM SAID PUMPING CHAMBER, AND A POCKET FORMED BY A CONTINUATION OF THE SINGLE CONTINUOUSLY SMOOTH INNER SURFACE OF SAID END WALL DEFINING AN ANNULAR CHAMBER IN SAID FRONT WALL TANGENT TO AND LOCATED ABOUT SAID INLET OPENING, SAID ANNULAR CHAMBER BEING OPEN TO SAID PUMPING CHAMBER WHEREBY A PORTION OF THE FLUID THEREIN ENTERS SAID ANNULAR CHAMBER AND IS REDIRECTED INTO SAID PUMPING CHAMBER TANGENTIALLY TO THE FLUID ENTERING SAID INLET OPENING.
References Cited (Backward Citations)
GB190121286A
Cited
DE444333C
Cited
US2635548A
Cited
US3171357A
Cited
US3167021A
Cited
US3190226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |