US3111305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High shear impeller
Assignee: National Oilwell Varco LP
•
Filing: 1960-09-22
•
Granted: 1963-11-19
•
Expires: 1980-09-22
Abstract
No abstract record available.
Inventors
- 👤 Robert L Bates
- 👤 Philip L Fondy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:24
CPC Classifications
B; B02; B02C; B02C13/00; B01; B01F; B01F27/00; B01F27/05; B01F27/07; B01F27/072; B01F27/0724
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN AN AGITATION APPARATUS WHEREIN HYDRAULIC SHEAR IS IMPARTED TO A LIQUID AND THE LIKE BY A ROTATING IMPELLER WHICH IS DRIVEN BY A POWER OPERATED MOTOR ASSEMBLY; THE IMPROVEMENT COMPRISING AN IMPELLER HAVING A HIGH EFFECTIVE CIRCULATING CAPACITY MOUNTED ON A SHAFT, SAID IMPELLER INCLUDING HUB MEANS AND A PLURALITY OF BLADES HAVING SUBSTANTIAL FREE LENGTH AND EXTENDING RADIALLY OUTWARD FROM SAID HUB MEANS, EACH BLADE BEING POSITIONED IN A PLANE WHICH IS PERPENDICULAR TO THE AXIS OF SAID HUB MEANS AND HAVING A THICKNESS DIMENSION LESS THAN THE ROOT HEIGHT DIMENSION THEREOF, AND THE ROOT HEIGHT DIMENSION OF EACH BLADE BEING GREATER THAN THE TIP HEIGHT DIMENSION THEREOF TO DEFINE A BLADE OF TAPERED CONFIGURATION HAVING AT LEAST ONE SURFACE WHICH IS INCLINED WITH RESPECT TO THE AXIS OF EACH SAID BLADE AND PROVIDING A HYDRAULIC SHEAR ZONE ALONG THE TIP OF EACH SAID BLADE.
Claim 2
Dependent Claim
147 words
IN AN AGITATION APPARATUS WHEREIN HYDRAULIC SHEAR IS IMPARTED TO A LIQUID AND THE LIKE BY A ROTATING IMPELLER WHICH IS DRIVEN BY A POWER OPERATED MOTOR ASSEMBLY; THE IMPROVEMENT COMPRISING AN IMPELLER HAVING A HIGH EFFECTIVE CIRCULATING CAPACITY MOUNTED ON A SHAFT, SAID IMPELLER INCLUDING HUB MEANS AND A PLURALITY OF BLADES HAVING SUBSTANTIAL FREE LENGTH AND EXTENDING RADIALLY OUTWARD FROM SAID HUB MEANS, EACH BLADE BEING POSITIONED IN A PLANE WHICH IS PERPENDICULAR TO THE AXIS OF SAID HUB MEANS AND HAVING A THICKNESS DIMENSION LESS THAN THE ROOT HEIGHT DIMENSION THEREOF, AND THE ROOT HEIGHT DIMENSION OF EACH BLADE BEING GREATER THAN THE TIP HEIGHT DIMENSION THEREOF TO DEFINE A BLADE OF TAPERED CONFIGURATION HAVING AT LEAST ONE SURFACE WHICH IS INCLINED WITH RESPECT TO THE AXIS OF EACH SAID BLADE AND PROVIDING A HYDRAULIC SHEAR ZONE ALONG THE TIP OF EACH SAID BLADE.
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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) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |