Patent US3336876A successfully refreshed from Google Patents.
US3336876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: Siemen and Hinsch GmbH
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Filing: 1965-09-27
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Granted: 1967-08-22
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Expires: 1985-09-27
Abstract
No abstract record available.
Inventors
- 👤 Streuli Theodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:16
CPC Classifications
F; F04; F04D; F04D5/00; F04D5/002; F04D5/003; F04D5/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A REVERSIBLE ROTARY, SELF-PRIMING SIDE CHANNEL PUMP FOR DELIVERY OF FLUID, AT LEAST ONE SIDE CHANNEL STAGE CONSTRUCTED AND ARRANGED FOR OPTIMUM OPERATION IN PREDETERMINED DIRECTIONS OF ROTATION AND FLUID FLOW, AT LEAST ONE OTHER SIDE CHANNEL STAGE CONSTRUCTED AND ARRANGED FOR OPTIMUM OPERATION IN OPPOSITE DIRECTIONS OF ROTATION AND FLUID FLOW, SAID STAGES BEING CONNECTED FOR OPERATION IN SERIES, AND REVERSIBLE DRIVE MEANS FOR SELECTIVELY ACTUATING BOTH STAGES TOGETHER FOR OPERATION IN SAID PREDETERMINED DIRECTIONS OF ROTATION AND FLUID FLOW AT ONE TIME AND FOR OPERATION IN THE OPPOSITE DIRECTIONS OF ROTATION AND FLUID FLOW AT ANOTHER TIME.
Claim 2
Dependent Claim
100 words
IN A REVERSIBLE ROTARY, SELF-PRIMING SIDE CHANNEL PUMP FOR DELIVERY OF FLUID, AT LEAST ONE SIDE CHANNEL STAGE CONSTRUCTED AND ARRANGED FOR OPTIMUM OPERATION IN PREDETERMINED DIRECTIONS OF ROTATION AND FLUID FLOW, AT LEAST ONE OTHER SIDE CHANNEL STAGE CONSTRUCTED AND ARRANGED FOR OPTIMUM OPERATION IN OPPOSITE DIRECTIONS OF ROTATION AND FLUID FLOW, SAID STAGES BEING CONNECTED FOR OPERATION IN SERIES, AND REVERSIBLE DRIVE MEANS FOR SELECTIVELY ACTUATING BOTH STAGES TOGETHER FOR OPERATION IN SAID PREDETERMINED DIRECTIONS OF ROTATION AND FLUID FLOW AT ONE TIME AND FOR OPERATION IN THE OPPOSITE DIRECTIONS OF ROTATION AND FLUID FLOW AT ANOTHER TIME.
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) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |