US5040944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump having impeller rotational about convoluted stationary member
Assignee: COOK JERRY E EXECTUOR
•
Filing: 1989-09-11
•
Granted: 1991-08-20
•
Expires: 2009-09-11
Abstract
Abstract A pump with a tubular housing having a predetermined inlet and outlet, a convoluted stationary member mounted in the tubular housing and a rod extending in a substantially spiral course received within the housing for rotation about the stationary member to move fluid from the inlet through the housing and from the outlet thereof.
Inventors
- 👤 Einar P. Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:27
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/047; A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/126; A61M60/13; A61M60/165; A61M60/178; A61M60/20; A61M60/205; A61M60/216; A61M60/237; A61M60/40; A61M60/403; A61M60/408; A61M60/411; A61M60/414; A61M60/80; A61M60/802; A61M60/804; F04D29/043; F04D29/18; F04D29/181; F04D29/40; F04D29/52; F04D29/54; F04D29/548; F04D3/00; F04D3/02; A61M25/00; A61M60/148; A61M60/818; A61M60/824; Y; Y10; Y10S; Y10S415/00; Y10S415/90
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
66 words
A pump comprising a tubular housing having a predetermined inlet and outlet, a convoluted stationary member mounted in the tubular housing, an impeller received within the housing for rotation about the stationary member, and means for interconnecting the impeller and a drive means operable to rotate said impeller about the stationary member to move fluid from the inlet through the housing and from the outlet thereof.
Claim 2
Dependent Claim
66 words
A pump comprising a tubular housing having a predetermined inlet and outlet, a convoluted stationary member mounted in the tubular housing, an impeller received within the housing for rotation about the stationary member, and means for interconnecting the impeller and a drive means operable to rotate said impeller about the stationary member to move fluid from the inlet through the housing and from the outlet thereof.
Claim 3
Dependent Claim
29 words
The pump of claim 1 wherein said housing is substantially concentric to a longitudinal axis and said stationary member is substantially symmetrical to said longitudinal axis of the housing.
Claim 4
Dependent Claim
22 words
The pump of claim 1 wherein said stationary member substantially defines a helix having lateral edges substantially equally spaced from the housing.
Claim 5
Dependent Claim
49 words
The pump of claim 3 wherein said impeller includes a pair of rods having a central mounting portion adjacent to the outlet of the housing and extending in a pair of oppositely wound spiral courses toward said inlet end of the housing about said helix of the stationary member.
Claim 6
Dependent Claim
78 words
The pump of claim 4 wherein said interconnecting means includes a bearing mounted in substantial alignment with the longitudinal axis of the housing adjacent to the outlet thereof, a drive cable mounted for rotational movement in said bearing, a mount interconnecting the cable and said mounting portion; of the impeller and said drive means for rotating said cable to rotate the pair of rods of the impeller about the stationary member to move said fluid through the housing.
Claim 7
Dependent Claim
37 words
The pump of claim 1 wherein said impeller includes an elongated rod extending in a spiral course about the stationary member and said stationary member inwardly of said spiral course of the rod substantially defines a helix.
References Cited (Backward Citations)
US536925A
Cited
US589532A
Cited
US1111722A
Cited
US1273913A
Cited
US1378891A
Cited
US1581683A
Cited
US2256659A
Cited
US2633290A
Cited
US2893688A
Cited
US3266555A
Cited
US3880548A
Cited
US4625712A
Cited
US4704121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |