Patent US4255081A successfully refreshed from Google Patents.
US4255081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump
Assignee: Pump Engineering LLC
•
Filing: 1979-06-07
•
Granted: 1981-03-10
•
Expires: 1999-06-07
Abstract
Abstract The invention is directed to a rotor for a centrifugal pump. The rotor has a plurality of spaced apart, substantially circular, rotatable and substantially parallel disks. The disks contain a center aperture. A plurality of arcuate vanes are connected to the outer peripheral edge of the disks. The vanes extend from the outer peripheral edge of the disks in a direction away from the center aperture in the disks.
Inventors
- 👤 Robert A. Oklejas
- 👤 Eli Oklejas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:29
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/08; F04D17/16; F04D17/161; F04D5/00; F04D5/001
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
A rotor for a centrifugal pump comprising: a plurality of spaced apart, substantially circular, rotatable and substantially parallel disks, the disks containing a center aperture; and a plurality of arcuate vanes connected to the outer peripheral edge of the disks, the vanes extending from the outer peripheral edge of the disks in a direction away from the center aperture in the disks.
Claim 2
Dependent Claim
62 words
A rotor for a centrifugal pump comprising: a plurality of spaced apart, substantially circular, rotatable and substantially parallel disks, the disks containing a center aperture; and a plurality of arcuate vanes connected to the outer peripheral edge of the disks, the vanes extending from the outer peripheral edge of the disks in a direction away from the center aperture in the disks.
Claim 3
Dependent Claim
57 words
The rotor of claim 1 wherein a rotatable shaft is positioned in the centrifugal pump, an impeller hub being connected to the rotatable shaft, a circular member being positioned in the centrifugal pump in spaced apart, substantially parallel relationship to the impeller hub, the plurality of disks being mounted between the impeller hub and the circular member.
Claim 4
Dependent Claim
23 words
The rotor of claim 2 wherein the diameter of the disks is less than the diameter of the impeller hub and circular member.
Claim 5
Dependent Claim
29 words
The rotor of claim 3 wherein the vanes extend from the outer peripheral edges of the disks to the outer peripheral edge of the impeller hub and circular member.
Claim 6
Dependent Claim
17 words
The rotor of claim 4 wherein the vanes extend from the impeller hub to the circular member.
Claim 7
Dependent Claim
20 words
The rotor of claim 5 wherein the vanes position the plurality of disks between the impeller hub and circular member.
References Cited (Backward Citations)
US1013248A
Cited
SU128235A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |