Patent US3737110A successfully refreshed from Google Patents.
US3737110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: Individual
•
Filing: 1970-09-11
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Granted: 1973-06-05
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Expires: 1990-09-11
Abstract
Abstract A combined pumping and filtering mechanism for viscous liquids containing solids comprises a central cylindrical chamber surrounded by one or more concentric annular chambers, each of which contains a rotatable impeller mounted at an angle with respect to a radial plane.
Inventors
- 👤 G Neidl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:05
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/0084; B02C18/0092; B01; B01D; B01D21/00; B01D21/0012; B01D21/26; B01D29/00; B01D29/01; B01D29/03; B01D29/035; B01D29/11; B01D29/31; B01D29/35; B01D29/50; B01D29/52; B01D29/54; B01D29/76; B01D29/86; B01D29/88; B01D29/94; B01D29/945; B01D35/00; B01D35/02; B01D35/26; B07; B07B; B07B1/00; F; F04; F04D; F04D11/00; F04D11/005; B07B2230/00; B07B2230/01
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
146 words
A pump and strainer assembly comprising a stationary pump housing formed by walls defining a first pump chamber therein, an impeller rotating in said first pump chamber, a drive shaft for said impeller extending axially into said pump housing, said impeller being secured to said shaft for rotation in planes inclined to said shaft, a first shell enclosing said pump housing and forming with the walls thereof a second pump chamber, an annular impeller rotating in said second pump chamber around said pump housing, drive means for said impeller, strainer passages in said pump housing connecting said first and second pump chamber, a second shell enclosing said first shell and forming with the walls thereof a third chamber, strainer passages in said second shell connecting said second pump chamber with said third chamber, an inlet for said first pump chamber, and outlets for all said chambers.
Claim 2
Dependent Claim
146 words
A pump and strainer assembly comprising a stationary pump housing formed by walls defining a first pump chamber therein, an impeller rotating in said first pump chamber, a drive shaft for said impeller extending axially into said pump housing, said impeller being secured to said shaft for rotation in planes inclined to said shaft, a first shell enclosing said pump housing and forming with the walls thereof a second pump chamber, an annular impeller rotating in said second pump chamber around said pump housing, drive means for said impeller, strainer passages in said pump housing connecting said first and second pump chamber, a second shell enclosing said first shell and forming with the walls thereof a third chamber, strainer passages in said second shell connecting said second pump chamber with said third chamber, an inlet for said first pump chamber, and outlets for all said chambers.
Claim 3
Dependent Claim
26 words
An assembly as claimed in claim 1 wherein said annular impeller has an inclination different from the inclination of the impeller in said first pump chamber.
References Cited (Backward Citations)
US2956503A
Cited
US3113734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |