Patent US4471835A successfully refreshed from Google Patents.
US4471835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer pump
Assignee: J CASHEW JR TRUST U/A DTD OCTOBER 7 1993
•
Filing: 1982-03-16
•
Granted: 1984-09-18
•
Expires: 2002-03-16
Abstract
Abstract A centrifugal circulation pump for a fluid heat carrier where the pump has a housing including a centrifugal impeller, an inlet pipe for admitting a first heat carrier into the housing and a discharge pipe for discharging the first heat carrier from the housing. A heat transfer means in the form of a tubular coil is positioned in the housing through which a second heat carrier flows. The centrifugal impeller moves the first heat carrier with a swirl motion in a direction parallel to the turns of the coil whereby heat is exchanged between the first and second heat carriers.
Inventors
- 👤 Karsten Laing
- 👤 Oliver Laing
- 👤 Ludwig Ludin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:19
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/06; F28F21/062; F24; F24D; F24D3/00; F24D3/12; F24D3/16; F28F13/00; F28F13/06; F28F13/12; F28F13/125; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
162 words
A circulation pump for a fluid heat carrier comprising a pump housing having a first fluid heat carrier inlet through which a first heat carrier is discharged into said housing and a first fluid heat carrier outlet through which said first fluid heat carrier is discharged from said housing, a centrifugal impeller communicating with said first fluid heat carrier inlet and discharging said first fluid heat carrier into said housing with a whirl motion, and heat transfer means in said housing in the form of a helical tubular coil through which a second fluid heat carrier flows having a plurality of turns and having a second fluid heat carrier inlet and a second fluid heat carrier outlet both connected to a side of said housing with the direction of the turns of said coil being substantially in the same direction of said whirl whereby substantially the complete length of the coil is subjected to the whirl motion of the first heat carrier.
Claim 2
Dependent Claim
162 words
A circulation pump for a fluid heat carrier comprising a pump housing having a first fluid heat carrier inlet through which a first heat carrier is discharged into said housing and a first fluid heat carrier outlet through which said first fluid heat carrier is discharged from said housing, a centrifugal impeller communicating with said first fluid heat carrier inlet and discharging said first fluid heat carrier into said housing with a whirl motion, and heat transfer means in said housing in the form of a helical tubular coil through which a second fluid heat carrier flows having a plurality of turns and having a second fluid heat carrier inlet and a second fluid heat carrier outlet both connected to a side of said housing with the direction of the turns of said coil being substantially in the same direction of said whirl whereby substantially the complete length of the coil is subjected to the whirl motion of the first heat carrier.
Claim 3
Dependent Claim
40 words
A circulation pump according to claim 1 wherein said coil comprises an inner coil section in series connection with an outer coil section concentrically within the housing and the outer coil section extending substantially to the periphery of said housing.
References Cited (Backward Citations)
CH15558A
Cited
US886518A
Cited
US1791528A
Cited
DE516704C
Cited
US3302700A
Cited
US3517732A
Cited
US3934857A
Cited
GB2085143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |