Patent US4653977A successfully refreshed from Google Patents.
US4653977A
Expired / Lapsed
US
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Pump for mixing and pumping liquids
Assignee: Xylem Water Solutions AB
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Filing: 1985-01-22
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Granted: 1987-03-31
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Expires: 2005-01-22
Abstract
Abstract A pump for pumping and mixing of liquids containing suspensions comprises a housing having an impeller rotatable in both directions and a central inlet. The housing is provided with two outlets which are closed alternatively by a ball, depending on the rotation direction of the impeller.
Inventors
- 👤 Hjalmar Fries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:10
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0005; F04D15/0016; B; B01; B01F; B01F25/00; B01F25/20; B01F25/21; B01F35/00; B01F35/75; B01F35/752; F04D29/00; F04D29/18; F04D29/22; F04D29/2261; F04D29/2283; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/48; F04D29/486
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
193 words
Apparatus for pumping and mixing a fluid medium comprising: a housing including a chamber having a central inlet and first and second outlet means, said first outlet means extending from said chamber and housing and being configured for pumping and said second outlet means extending from said chamber and housing and being configured for mixing; an impeller mounted in said chamber for rotation in one direction for pumping and in an opposite direction for mixing, said impeller having blades in at least a partly reactive configuration along one side to impart increased static pressure to said fluid medium when said impeller is rotated in said one direction for pumping, said blades of said impeller further having at least a partially active configuration along an opposite side to impart high speed by way of increased dynamic pressure to said fluid medium when said impeller is rotated in said opposite direction; and means responsive to said impeller being rotated in said one direction for closing said second outlet means to fluid medium flow and further responsive to said impeller being rotated in said opposite direction for closing said first outlet means to fluid medium flow.
Claim 2
Dependent Claim
193 words
Apparatus for pumping and mixing a fluid medium comprising: a housing including a chamber having a central inlet and first and second outlet means, said first outlet means extending from said chamber and housing and being configured for pumping and said second outlet means extending from said chamber and housing and being configured for mixing; an impeller mounted in said chamber for rotation in one direction for pumping and in an opposite direction for mixing, said impeller having blades in at least a partly reactive configuration along one side to impart increased static pressure to said fluid medium when said impeller is rotated in said one direction for pumping, said blades of said impeller further having at least a partially active configuration along an opposite side to impart high speed by way of increased dynamic pressure to said fluid medium when said impeller is rotated in said opposite direction; and means responsive to said impeller being rotated in said one direction for closing said second outlet means to fluid medium flow and further responsive to said impeller being rotated in said opposite direction for closing said first outlet means to fluid medium flow.
Claim 3
Dependent Claim
23 words
The arrangement as claimed in claim 1 further comprising: means for guiding said closing means for movement between said first and second positions.
Claim 4
Dependent Claim
14 words
The arrangement as claimed in claim 2 wherein the guiding means is a track.
Claim 5
Dependent Claim
21 words
The arrangement as claimed in claim 1 wherein said first outlet means includes a connector for joining a pumping conduit means.
Claim 6
Dependent Claim
26 words
The apparatus according to claim 1 wherein said second outlet means exhibits a conically decreasing configuration for increasing the speed of said fluid medium being mixed.
Claim 7
Dependent Claim
83 words
The apparatus according to claim 1 wherein said means for closing is displaceable to a first position in response to said fluid medium when said impeller is rotated in said one direction and displaceable to a second position in response to said fluid medium when said impeller is rotated in said opposite direction, said means responsive closing said second outlet means to fluid medium flow in said first position and closing said first outlet means to fluid medium flow in said second position.
Claim 8
Dependent Claim
14 words
The arrangement as claimed in claim 6 wherein said closing means is a ball.
References Cited (Backward Citations)
GB315321A
Cited
FR1049066A
Cited
FR1142593A
Cited
US3048117A
Cited
US4264215A
Cited
US4519715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |