Patent US4366858A successfully refreshed from Google Patents.
US4366858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-deaerating heat exchanger for engine cooling circuits
Assignee: Chausson Usines SA
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Filing: 1980-11-10
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Granted: 1983-01-04
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Expires: 2000-11-10
Abstract
Abstract The outlet header tank forms two compartments separated by a partition wall provided with a hole in its lower portion and causing a pressure loss at least equal to the head of water in the header tank so that air possibly existing in the compartment is expelled via a pipe.
Inventors
- 👤 Jean-Pierre Moranne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:46
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0231; F01; F01P; F01P2025/00; F01P2025/08; F01P2025/52; F01P7/00; F01P7/02; F01P7/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
169 words
A self-deaerating heat exchanger for engine cooling circuits, of the type in which coolant tubes are placed horizontally and connected by tube plates covered by inlet and outlet header tanks containing coolant liquid, wherein a vertical partition wall divides the outlet tank into first and second compartments, the first compartment communicating with the coolant tubes and the second compartment communicating both with a filling spout opening in the upper portion thereof and with a liquid return means opening in the bottom portion thereof, the partition wall having a lower opening having a passage cross-section causing a pressure loss at least equal to the head of liquid in the outlet tank for the liquid flowing from one compartment to the other, said lower opening being provided below the level of liquid in the second compartment, and a pipe open at the two ends thereof extending from the top portion of the first compartment to a level of the second compartment situated below the level of liquid in said second compartment.
Claim 2
Dependent Claim
169 words
A self-deaerating heat exchanger for engine cooling circuits, of the type in which coolant tubes are placed horizontally and connected by tube plates covered by inlet and outlet header tanks containing coolant liquid, wherein a vertical partition wall divides the outlet tank into first and second compartments, the first compartment communicating with the coolant tubes and the second compartment communicating both with a filling spout opening in the upper portion thereof and with a liquid return means opening in the bottom portion thereof, the partition wall having a lower opening having a passage cross-section causing a pressure loss at least equal to the head of liquid in the outlet tank for the liquid flowing from one compartment to the other, said lower opening being provided below the level of liquid in the second compartment, and a pipe open at the two ends thereof extending from the top portion of the first compartment to a level of the second compartment situated below the level of liquid in said second compartment.
Claim 3
Dependent Claim
25 words
A heat exchanger according to claim 1, wherein said pipe has a bent bottom portion including an end portion directed upwardly inside the second compartment.
Claim 4
Dependent Claim
44 words
A heat exchanger according to claim 1, wherein the pipe has an upper end portion mounted in an upper hole in the partition wall at a level at least equal to the level of the highest coolant tube or tubes of the heat exchanger.
Claim 5
Dependent Claim
52 words
A heat exchanger according to claim 1, wherein the pipe extends in part in the first compartment, said pipe having one end opening into the top portion of said first compartment and having a bent portion which extends through the partition wall lower opening causing a pressure loss between the two compartments.
Claim 6
Dependent Claim
36 words
A heat exchanger according to claim 1, wherein the inlet header tank comprises at least one tubing for feeding coolant liquid, and a plug at the upper portion thereof for connecting it with the free air.
Claim 7
Dependent Claim
82 words
A heat exchanger according to claim 1, wherein the header tank is made of first and second complementary parts, the first part being shaped so as to be tightly assembled to a tube plate and having a bottom portion in which is formed the partition wall lower opening, and the second part being in the shape of an open tank which forms a tubing for draining away coolant liquid as well as a filling spout adapted for being closed by a plug.
Claim 8
Dependent Claim
16 words
A heat exchanger according to claim 6, wherein said plug includes an over- and under-pressure valve.
Claim 9
Dependent Claim
22 words
A heat exchanger according to claim 1, wherein the outlet header tank comprising the partition wall is made of a molded material.
Claim 10
Dependent Claim
123 words
A heat exchanger according to claim 1, wherein the outlet header tank is made of a molded material for delimiting, in the vicinity of the top of the outlet header tank intended for extending in an approximately vertical direction, a filling spout and, in the vicinity of the lower portion of the outlet header tank, a draining tubing, said header tank having a free edge forming a bearing heel for deforming a sealing gasket interposed between the outlet header tank and the tube plate, said sealing gasket forming a diaphragm in which is formed the partition wall lower opening causing a pressure loss, said diaphragm bearing against a grid kept at a distance from the bottom of the outlet header tank by spacers.
Claim 11
Dependent Claim
40 words
A heat exchanger according to claim 1, wherein clamps project from the partition wall for securing the pipe opening in the upper portion of the outlet header tank and extending through the partition wall lower opening causing a pressure loss.
Claim 12
Dependent Claim
39 words
A heat exchanger according to claim 9, wherein clamps project from the diaphragm for securing the pipe opening in the upper portion of the outlet header tank and extending through the partition wall lower opening causing a pressure loss.
Claim 13
Dependent Claim
22 words
A heat exchanger according to claim 1, wherein the second compartment is provided with a capacity sufficient for forming a makeup tank.
Claim 14
Dependent Claim
55 words
A heat exchanger according to claim 1, wherein the outlet header tank is made of a molded synthetic material for delimiting the two compartments and the partition wall separating them, said outlet header tank being open at the upper portion thereof and receiving a cover also made of a molded synthetic material and fixed thereto.
Claim 15
Dependent Claim
87 words
A heat exchanger according to claim 1, wherein the inlet header tank is divided in a known manner by a transverse partition wall, feeding tubings and drain tubings being provided, respectively, in two compartments which are formed by said transverse partition wall, and wherein a calibrated port is formed in an auxiliary partition wall dividing the first compartment communicating with the coolant tubes into two compartments so that the pressure loss created by the calibrated port causes an overpressure at the top portion of the first compartment.
Claim 16
Dependent Claim
26 words
A heat exchanger according to claim 12, wherein the transverse partition wall dividing the first compartment is formed by a rib protruding towards the tube plate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |