US3133505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller wheel
Assignee: Siemen and Hinsch GmbH
•
Filing: 1960-11-17
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Granted: 1964-05-19
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Expires: 1980-11-17
Abstract
No abstract record available.
Inventors
- 👤 Heerens Heinz
- 👤 Luhmann Reinhold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:42
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2238
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A BLADE FOR USE WITH AN IMPELLER WHEEL FOR ROTARY PUMPS INCLUDING A HUB AND A PLURALITY OF ELONGATED BLADES HAVING LONGITUDINAL AXES RADIATING THEREFROM, SAID BLADE HAVING A RADIAL PRESSURE FACE AND AN INCLINED SUCTION FACE AND DECREASING IN THICKNESS FROM THE HUB TOWARD THE TIP, THE WIDTH OF SAID FACES BEING CONSTANT, SAID SUCTION FACE HAVING A PLANE REAR SURFACE THE WIDTH OF WHICH IS LESS THAN THAT OF THE PRESSURE FACE BUT AT LEAST ONE THIRD OF THE WIDTH OF THE PRESSURE FACE ON A PLANE PERPENDICULAR TO THE LONGITUDINAL AXIS OF THE BLADE, SAID PLANE REAR SURFACE EXTENDING SUBSTANTIALLY PARALLEL TO A LINE THROUGH THE TWO SIDE EDGES OF THE PRESSURE FACE OF THE BLADE, AND A NARROW RIM OF UNIFORM THICKNESS EXTENDING IN PERPENDICULAR RELATION TO SAID LINE AT EACH LATERAL SIDE OF SAID PRESSURE FACE.
Claim 2
Dependent Claim
141 words
A BLADE FOR USE WITH AN IMPELLER WHEEL FOR ROTARY PUMPS INCLUDING A HUB AND A PLURALITY OF ELONGATED BLADES HAVING LONGITUDINAL AXES RADIATING THEREFROM, SAID BLADE HAVING A RADIAL PRESSURE FACE AND AN INCLINED SUCTION FACE AND DECREASING IN THICKNESS FROM THE HUB TOWARD THE TIP, THE WIDTH OF SAID FACES BEING CONSTANT, SAID SUCTION FACE HAVING A PLANE REAR SURFACE THE WIDTH OF WHICH IS LESS THAN THAT OF THE PRESSURE FACE BUT AT LEAST ONE THIRD OF THE WIDTH OF THE PRESSURE FACE ON A PLANE PERPENDICULAR TO THE LONGITUDINAL AXIS OF THE BLADE, SAID PLANE REAR SURFACE EXTENDING SUBSTANTIALLY PARALLEL TO A LINE THROUGH THE TWO SIDE EDGES OF THE PRESSURE FACE OF THE BLADE, AND A NARROW RIM OF UNIFORM THICKNESS EXTENDING IN PERPENDICULAR RELATION TO SAID LINE AT EACH LATERAL SIDE OF SAID PRESSURE FACE.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |