US3893785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for mixing and impelling of heat-exchange fluids
Assignee: Saurer AG
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Filing: 1973-08-31
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Granted: 1975-07-08
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Expires: 1993-08-31
Abstract
Abstract A wall means defines a first, a second and a third chamber. An impeller is interposed between the first and the second chambers and has a suction side communicating with the first chamber and a pressure side communicating with the second chamber. An outlet communicates with the second chamber and with a user. A pair of inlets for cooler and hotter fluid each communicate with one of the first and third chambers, respectively. A pair of axially aligned apertures connects the first and third chambers with one another. A tubular baffle is shiftable axially in the apertures for increasing the effective cross-section of one of the apertures while simultaneously decreasing the effective cross section of the other aperture, and vice versa.
Inventors
- 👤 Edmund Maron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:46
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0005; F04D15/0016; F04D29/00; F04D29/40; F04D29/42; F04D29/426; F04D29/4273; F24; F24D; F24D3/00; F24D3/10; F24D3/105
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
In a device for mixing and impelling of heat-exchange fluids, a combination comprising wall means defining a first, a second and a third chamber; an impeller interposed between said first and second chamber and having a suction side adapted to communicate with said first and said third chamber, and a pressure side communicating with said second chamber; and outlet communicating with said second chamber and with a user; a pair of inlets for cooler or hotter heat-exchange fluid each communicating with one of said first and third chambers, respectively; a pair of axially aligned apertures axially spaced from said suction side of said impeller and connecting said first and third chambers with one another; and tubular baffle means shiftable axially in said apertures and operative for increasing the effective cross-section of one of said apertures while simultaneously decreasing the effective cross-section of the other aperture, and vice versa.
Claim 2
Dependent Claim
148 words
In a device for mixing and impelling of heat-exchange fluids, a combination comprising wall means defining a first, a second and a third chamber; an impeller interposed between said first and second chamber and having a suction side adapted to communicate with said first and said third chamber, and a pressure side communicating with said second chamber; and outlet communicating with said second chamber and with a user; a pair of inlets for cooler or hotter heat-exchange fluid each communicating with one of said first and third chambers, respectively; a pair of axially aligned apertures axially spaced from said suction side of said impeller and connecting said first and third chambers with one another; and tubular baffle means shiftable axially in said apertures and operative for increasing the effective cross-section of one of said apertures while simultaneously decreasing the effective cross-section of the other aperture, and vice versa.
Claim 3
Dependent Claim
27 words
A combination as defined in claim 1, wherein said impeller is rotatable about an axis which is coincident with a longitudinal axis of said tubular baffle means.
Claim 4
Dependent Claim
29 words
A combination as defined in claim 1, said tubular baffle means having an outer cylindrical circumference; and further comprising a lip-seal of substantially L-shaped cross-section mounted on said circumference.
Claim 5
Dependent Claim
36 words
A combination as defined in claim 1; and further comprising a temperature sensor projecting through said wall means into said second chamber; and thermal insulating means thermally insulating said sensor with respect to said wall means.
Claim 6
Dependent Claim
13 words
A combination as defined in claim 4, wherein said second chamber is annular.
Claim 7
Dependent Claim
73 words
A combInation as defined in claim 5, wherein said outlet is bounded by a first edge and by an opposite second edge which is spaced from said first edge in direction of rotation of said impeller; and wherein said temperature sensor projects into said second chamber in a region included in an angle of up to 180* extending from said second edge circumferentially of said annular second chamber in said direction of rotation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |