Patent US3765479A successfully refreshed from Google Patents.
US3765479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid cooled engine
Assignee: Individual
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Filing: 1971-01-28
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Granted: 1973-10-16
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Expires: 1991-01-28
Abstract
Abstract A novel engine cooling system which incorporates a special heat exchanger. The heat exchanger replaces the conventional exhaust inlet or inlet manifold of an internal combustion engine. The heat exchanger includes an exhaust conduit having an inlet portion, an intermediate portion and an outlet portion. Encompassing walls define two separate flowpaths for coolant such that the coolant is in thermal communication with the exhaust conduit. A first one of these passages extends only over the inlet portion of the exhaust conduit; the other of the coolant passageways extends over the intermediate and outlet portions of the conduit although it can, and, in the embodiment shown, does extend over the inlet portion as well. The heat exchanger is connected to receive exhaust gases from the engine. Its coolant passageways are connected in a circuit which includes an inlet by which make-up water is introduced into a pump which forces fluid through the first passageway of the heat exchanger into the cooling passages of the engine from whence it is circulated back to the inlet side of the pump when the coolant has a temperature below a selected value. When the coolant temperature rises above that value, it is permitted to flow past a thermostatic valve to the second coolant passageway of the heat exchanger, after which it is exhausted to the exhaust gas stream. The heat exchanger is oriented so that one portion of the second coolant passageway is disposed above other portions and the conduit is arranged so that flow is confined at one point along the length of the exhaust conduit to flow in the region of that uppermost point whereby the second fluid passageway is maintained substantially full of coolant from that point upstream.
Inventors
- 👤 R Fish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:18
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/10; F28D7/106; F01; F01N; F01N3/00; F01N3/02; F01N3/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
181 words
For use in cooling an engine which has an exhaust gas exit port and has an inlet opening and an outlet opening for receiving and discharging fluid, respectively: a heat exchanger comprising an exhaust conduit formed by an encompassing wall and defining an inlet portion for receiving exhaust gas from the engine exit port, an intermediate portion, and an outlet end portion for discharging exhaust gas that has traversed said intermediate portion after entering at the inlet portion; a jacket comprising said encompassing wall and an overlying outer wall, said jacket being formed to define two passageways capable of conducting liquid coolant, one of said passageways extending over the inlet portion of said exhaust conduit, the other one of said passageways extending over the intermediate portion of said exhaust conduit; and means interconnecting said heat exchanger and said engine such that exhaust gas is permitted to flow to said exhaust conduit, coolant is permitted to flow from said one passageway to said engine inlet, and fluid from said engine outlet is permitted to flow to said other one of said passageways.
Claim 2
Dependent Claim
181 words
For use in cooling an engine which has an exhaust gas exit port and has an inlet opening and an outlet opening for receiving and discharging fluid, respectively: a heat exchanger comprising an exhaust conduit formed by an encompassing wall and defining an inlet portion for receiving exhaust gas from the engine exit port, an intermediate portion, and an outlet end portion for discharging exhaust gas that has traversed said intermediate portion after entering at the inlet portion; a jacket comprising said encompassing wall and an overlying outer wall, said jacket being formed to define two passageways capable of conducting liquid coolant, one of said passageways extending over the inlet portion of said exhaust conduit, the other one of said passageways extending over the intermediate portion of said exhaust conduit; and means interconnecting said heat exchanger and said engine such that exhaust gas is permitted to flow to said exhaust conduit, coolant is permitted to flow from said one passageway to said engine inlet, and fluid from said engine outlet is permitted to flow to said other one of said passageways.
Claim 3
Dependent Claim
29 words
The invention defined in claim 1 in which said other one of said passageways is formed with an outlet opening which opens at the interior of said exhaust conduit.
Claim 4
Dependent Claim
44 words
The invention defined in claim 2 in which said jacket further comprises means for insuring that said other one of said passageways is substantially completely filled with coolant along an initial portion of its length before fluid can be discharged from said outlet opening.
Claim 5
Dependent Claim
91 words
The invention defined in claim 1 in which said jacket comprises means for insuring that said other one of said passageways is substantially completely filled with coolant along an upstream portion of its length, said means comprising mounting means for mounting said conduit with one portion of said other one of said passageways uppermost and of dam means in the form of a dam interconnecting said inner and outer walls except in the region of said one portion of said other of said passageways for confining flow to that one portion.
Claim 6
Dependent Claim
172 words
In combination: an elongate exhaust conduit comprising an inlet section, an intermediate section and an outlet section, said conduit being formed with openings in its inlet section by which exhaust gases may be admitted thereto so that they will traverse the conduit from its inlet section through its intermediate section to be expelled at said outlet section; means comprising a first enclosing wall overlying portions of said exhaust conduit at its inlet section and defining a first passageway for coolant having inlet and outlet openings; means comprising a second enclosing wall overlying portions of said conduit at its intermediate section and at its outlet section and defining inlet and outlet openings; and means for orienting said conduit and enclosing walls such that one portion of the flowpath formed by said conduit and said second enclosing wall is uppermost in the vicinity of the juncture of said intermediate section and said outlet section of said conduit and for confining flow of fluid along said second passageway to flow substantially at said uppermost region.
Claim 7
Dependent Claim
172 words
In combination: an elongate exhaust conduit comprising an inlet section, an intermediate section and an outlet section, said conduit being formed with openings in its inlet section by which exhaust gases may be admitted thereto so that they will traverse the conduit from its inlet section through its intermediate section to be expelled at said outlet section; means comprising a first enclosing wall overlying portions of said exhaust conduit at its inlet section and defining a first passageway for coolant having inlet and outlet openings; means comprising a second enclosing wall overlying portions of said conduit at its intermediate section and at its outlet section and defining inlet and outlet openings; and means for orienting said conduit and enclosing walls such that one portion of the flowpath formed by said conduit and said second enclosing wall is uppermost in the vicinity of the juncture of said intermediate section and said outlet section of said conduit and for confining flow of fluid along said second passageway to flow substantially at said uppermost region.
Claim 8
Dependent Claim
122 words
The invention defined in claim 5 together with an engine comprising a plurality of spaced exhaust gas outlet ports, an inlet opening for coolant, an outlet opening for coolant, and internal passageways interconnecting said inlet and said outlet; means interconnecting the outlet ports of the engine with the openings in the inlet section of said exhaust conduit; means for connecting said first passageway and the passageways through said engine and said second passageway in series, in that order, comprising a first conduit extending from said first passageway defined by said first overlying wall to the inlet of said engine, and comprising a second interconnecting conduit extending from the outlet of said engine to said second passageway defined by said second overlying wall.
Claim 9
Dependent Claim
45 words
The invention defined in claim 6 together with means for forcing a flow of coolant into said first passageway and for permitting flow of coolant from said passageways of the engine to said second passageway when said coolant has a temperature exceeding a selected value.
Claim 10
Dependent Claim
35 words
The invention defined in claim 7 in which said first passageway is confined to the inlet area of said exhaust conduit and in which said second passageway extends throughout the length of said exhaust conduit.
Claim 11
Dependent Claim
37 words
The invention defined in claim 6 in which said conduit comprises a horizontal section and an inverted U-shaped section, said first enclosing wall overlying the horizontal section and said second enclosing wall overlying the inverted U-shaped section.
Claim 12
Dependent Claim
54 words
The invention defined in claim 9 in which said U-shaped section comprises a double-walled jacket and said means for confining the flow to said one portion of said second passageway comprises a dam disposed between the walls of the conduit and the second overlying wall except at an upper region of said U-shaped section.
Claim 13
Dependent Claim
56 words
The invention defined in claim 9 which further comprises an inlet conduit for make-up water connected to the inlet side of said pump, means interconnecting the passageways of the engine with the inlet side of said pump, said means for permitting flow of coolant from the engine pAssageways to said second conduit comprising a thermostatic valve.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |