US3240155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical rotary pumps
Assignee: Individual
•
Filing: 1965-01-21
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Granted: 1966-03-15
•
Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Quiroz Francisco Angel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:37
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/08; F04C2/10; F04C2/107; F04C2/3441; F04C2/3442
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A PUMP, A CYLINDRICAL HOUSING, A CYLINDRICAL ROTOR OF LESSER DIAMETER THEREIN, THE HOUSING AND THE ROTOR MEETING ALONG A LINE OF MUTUAL TANGENCY, THE ROTOR HAVING IN ITS CYLINDRICAL SURFACE A PAIR OF ZIGZAGGING HELICAL GROOVES DIAMETRICALLY OPPOSITE ONE ANOTHER, EACH GROOVE BEING COMPRISED OF SUCCESSIVE INTERCONNECTING GROOVE PORTIONS ORIENTED ALTERNATELY OBLIQUE AND PERPENDICULAR WITH RESPECT TO THE AXIAL DIRECTION, AND IMPELLER ELEMENTS MOVABLE, RADIALLY FITTING INTO THE GROOVES, EACH PERPENDICULAR PORTION OF EACH GROOVE BEING OCCUPIED TOGETHER WITH ESSENTIALLY HALF OF EACH OF THE ADJACENT OBLIQUE PORTIONS THEREOF BY A SINGLE IMPELLER ELEMENT, THE ADJACENT FACES OF EACH PAIR OF ADJOINING IMPELLER ELEMENTS BEING IN PARTIALLY OVERLAPPING CONTACT WITH ONE ANOTHER, AND THE PERIPHERAL SURFACE OF EACH IMPELLER ELEMENT HAVING CURVATURE MATCHING THAT OF THE CYLINDRICAL HOUSING SO AS TO FIT THEREAGAINST.
Claim 2
Dependent Claim
135 words
IN A PUMP, A CYLINDRICAL HOUSING, A CYLINDRICAL ROTOR OF LESSER DIAMETER THEREIN, THE HOUSING AND THE ROTOR MEETING ALONG A LINE OF MUTUAL TANGENCY, THE ROTOR HAVING IN ITS CYLINDRICAL SURFACE A PAIR OF ZIGZAGGING HELICAL GROOVES DIAMETRICALLY OPPOSITE ONE ANOTHER, EACH GROOVE BEING COMPRISED OF SUCCESSIVE INTERCONNECTING GROOVE PORTIONS ORIENTED ALTERNATELY OBLIQUE AND PERPENDICULAR WITH RESPECT TO THE AXIAL DIRECTION, AND IMPELLER ELEMENTS MOVABLE, RADIALLY FITTING INTO THE GROOVES, EACH PERPENDICULAR PORTION OF EACH GROOVE BEING OCCUPIED TOGETHER WITH ESSENTIALLY HALF OF EACH OF THE ADJACENT OBLIQUE PORTIONS THEREOF BY A SINGLE IMPELLER ELEMENT, THE ADJACENT FACES OF EACH PAIR OF ADJOINING IMPELLER ELEMENTS BEING IN PARTIALLY OVERLAPPING CONTACT WITH ONE ANOTHER, AND THE PERIPHERAL SURFACE OF EACH IMPELLER ELEMENT HAVING CURVATURE MATCHING THAT OF THE CYLINDRICAL HOUSING SO AS TO FIT THEREAGAINST.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |