US3723029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling water pump for automobiles
Assignee: Individual
•
Filing: 1971-03-15
•
Granted: 1973-03-27
•
Expires: 1991-03-15
Abstract
Abstract A coolant pump for liquid cooled engines where the pump casing has a chamber, a rotatable drive shaft in the pump casing, a first pole ring on the drive shaft and a second pole ring rotatably mounted in the pump chamber which has impeller blades thereon and means for hermatically sealing the pump chamber from the drive shaft and first pole ring. Means may also be included for varying the slippage between the first and second pole rings in order to vary pump output.
Inventors
- 👤 N Laing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:52
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02; F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D13/025; F04D13/026; F04D13/027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
165 words
A coolant pump for liquid cooled engines, said pump comprising a casing, a chamber in said casing through which coolant is adapted to circulate, a rotatable drive shaft journalled in said casing, a first pole ring having a convex outer surface mounted on said shaft, a second pole ring adapted to be dRiven by said first pole ring rotatably mounted in said chamber and having a convex outer surface and a concave inner surface with the concave surface thereof being positioned radially outwardly of the convex surface of said first pole ring to form a gap therebetween, impeller blades mounted on the convex surface of said second pole ring for inducing circulation of coolant in said chamber, a hemispherical separating wall positioned in said gap and affixed to said casing, and a cover means affixed to the end of said separating wall which covers the end of said first pole ring to hermatically seal said first pole ring and said drive shaft from said chamber.
Claim 2
Dependent Claim
165 words
A coolant pump for liquid cooled engines, said pump comprising a casing, a chamber in said casing through which coolant is adapted to circulate, a rotatable drive shaft journalled in said casing, a first pole ring having a convex outer surface mounted on said shaft, a second pole ring adapted to be dRiven by said first pole ring rotatably mounted in said chamber and having a convex outer surface and a concave inner surface with the concave surface thereof being positioned radially outwardly of the convex surface of said first pole ring to form a gap therebetween, impeller blades mounted on the convex surface of said second pole ring for inducing circulation of coolant in said chamber, a hemispherical separating wall positioned in said gap and affixed to said casing, and a cover means affixed to the end of said separating wall which covers the end of said first pole ring to hermatically seal said first pole ring and said drive shaft from said chamber.
Claim 3
Dependent Claim
47 words
A coolant pump according to claim 1 wherein one said pole ring has permanent magnets thereon and the other said pole ring has means thereon through which eddy currents may be induced by movement of said permanent magnets to form a magnetic couple between said pole rings.
Claim 4
Dependent Claim
41 words
A coolant pump according to claim 1 having in addition means for varying the magnetic couple between the pole rings in order to vary slippage of rotation of said second pole ring with respect to rotation of said first pole ring.
Claim 5
Dependent Claim
31 words
A coolant pump according to claim 3 wherein the means for varying the magnetic couple includes means for varying the width of the gap between the first and second pole rings.
Claim 6
Dependent Claim
34 words
A coolant pump according to claim 4 wherein said means for varying the width of the gap includes temperature responsive means for decreasing the width of the gap upon an increase in coolant temperature.
Claim 7
Dependent Claim
56 words
A coolant pump according to claim 1 having in addition a bushing mounted by said cover means concentric with said drive shaft, a ball rotatably mounted in said bushing, and a wheel disc fixed to said ball and to said second pole ring whereby said second pole ring may pivot about the center of said ball.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |