Patent US3732032A successfully refreshed from Google Patents.
US3732032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pumps
Assignee: BAGGERS Ltd
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Filing: 1971-02-16
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Granted: 1973-05-08
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Expires: 1991-02-16
Abstract
Abstract The invention relates to an impeller for a centrifugal pump permitting the passage of solids through the pump and which maintains a high delivery pressure and capacity in which the impeller has a body having, in cross section, a regular polygonal configuration, an axis of rotation located substantially equidistant the corners of the body, an inlet to the body located at the axis of rotation, an outlet from the body provided in a sidewall of the body and a conduit communicating between the inlet and the outlet.
Inventors
- 👤 C Daneel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:51
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2238; F04D29/225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
A pump impeller comprising a body having, in cross section, a regular polygonal configuration and a hollow interior, an axis of rotation located substantially equidistant the corners of the body, an inlet to the body located at the axis of rotation, a single outlet from the body provided in a sidewall of the body, each sidewall being perforated, in corresponding sidewall positions, towards a corner of the body, means balancing the impeller, and a conduit communicating between the inlet and the outlet.
Claim 2
Dependent Claim
82 words
A pump impeller comprising a body having, in cross section, a regular polygonal configuration and a hollow interior, an axis of rotation located substantially equidistant the corners of the body, an inlet to the body located at the axis of rotation, a single outlet from the body provided in a sidewall of the body, each sidewall being perforated, in corresponding sidewall positions, towards a corner of the body, means balancing the impeller, and a conduit communicating between the inlet and the outlet.
Claim 3
Dependent Claim
13 words
An impeller as claimed in claim 1 in which the body is three-sided.
Claim 4
Dependent Claim
17 words
An impeller as claimed in claim 2 in which the sidewalls of the body are bowed outwardly.
Claim 5
Dependent Claim
32 words
An impeller as claimed in claim 1 in which the outlet is provided in a sidewall between a perforation through the sidewall and a corner of the body remote from the perforation.
Claim 6
Dependent Claim
24 words
An impeller as claimed in claim 4 in which the outlet is located closer to the perforation than the corner remote from the perforation.
Claim 7
Dependent Claim
14 words
An impeller as claimed in claim 1 in which the impeller is balanced internally.
References Cited (Backward Citations)
US495760A
Cited
US882477A
Cited
US882478A
Cited
US1439365A
Cited
US1470607A
Cited
GB330071A
Cited
CH189936A
Cited
GB574079A
Cited
CH329498A
Cited
US2853019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |