Patent US4091782A successfully refreshed from Google Patents.
US4091782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel preheating apparatus
Assignee: Individual
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Filing: 1976-06-30
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Granted: 1978-05-30
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Expires: 1996-06-30
Abstract
Abstract A fuel preheating apparatus for use in internal combustion engines having a closed liquid coolant circuit including a coolant conduit through which heated liquid coolant flows and having a fuel storage tank having a fuel conduit for delivering fuel to the engine, the apparatus including a heat conducting coolant chamber located in the coolant conduit and an outer chamber surrounding the coolant chamber through which the fuel flows and in which the fuel is heated.
Inventors
- 👤 Barnabas Dunnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:40
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/16; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
367 words
A fuel preheating apparatus for use with an internal combustion engine having a closed liquid coolant circuit including a coolant conduit through which heated liquid coolant flows and having a fuel storage tank having a fuel conduit for delivering fuel to the engine, said apparatus comprising: an inner chamber formed of heat conductive material, said inner chamber including a coolant inlet coupled to the coolant conduit for receiving heated liquid coolant from the coolant conduit, and a coolant outlet coupled to the coolant conduit for discharging liquid coolant to the coolant conduit; and an outer chamber surrounding at least a portion of said inner chamber, said outer chamber including a fuel inlet coupled to the fuel conduit for receiving fuel from the fuel storage tank via the fuel conduit, and a fuel outlet coupled to the fuel conduit for discharging fuel to the fuel conduit for delivery to the engine, whereby liquid coolant flows through said inner chamber via said coolant inlet and outlet, thereby heating said inner chamber, and whereby fuel flows through said outer chamber via said fuel inlet and outlet and, via contact with said heated inner chamber, is heated, wherein said inner chamber is in the form of a cylinder said coolant inlet is a first open end of said cylinder, and said coolant outlet is a second open end of said cylinder, wherein said outer chamber is in the form of a cylinder concentrically surrounding at least a portion of said inner chamber, said outer chamber cylinder having a first end plate with an aperture therein receiving said inner chamber and having a diameter substantially equal to the outer diameter of said inner chamber, and having a second end plate with an aperture therein receiving said inner chamber and having a diameter substantially equal to the outer diameter of said inner chamber, and further including an intermediate open-ended cylinder concentrically surrounding a portion of said inner chamber within said outer chamber, said intermediate cylinder having a diameter greater than said inner chamber diameter, and having one end in contact with said outer chamber second end plate, and a tube interconnecting the interior of said intermediate cylinder and said outer chamber fuel outlet.
Claim 2
Dependent Claim
367 words
A fuel preheating apparatus for use with an internal combustion engine having a closed liquid coolant circuit including a coolant conduit through which heated liquid coolant flows and having a fuel storage tank having a fuel conduit for delivering fuel to the engine, said apparatus comprising: an inner chamber formed of heat conductive material, said inner chamber including a coolant inlet coupled to the coolant conduit for receiving heated liquid coolant from the coolant conduit, and a coolant outlet coupled to the coolant conduit for discharging liquid coolant to the coolant conduit; and an outer chamber surrounding at least a portion of said inner chamber, said outer chamber including a fuel inlet coupled to the fuel conduit for receiving fuel from the fuel storage tank via the fuel conduit, and a fuel outlet coupled to the fuel conduit for discharging fuel to the fuel conduit for delivery to the engine, whereby liquid coolant flows through said inner chamber via said coolant inlet and outlet, thereby heating said inner chamber, and whereby fuel flows through said outer chamber via said fuel inlet and outlet and, via contact with said heated inner chamber, is heated, wherein said inner chamber is in the form of a cylinder said coolant inlet is a first open end of said cylinder, and said coolant outlet is a second open end of said cylinder, wherein said outer chamber is in the form of a cylinder concentrically surrounding at least a portion of said inner chamber, said outer chamber cylinder having a first end plate with an aperture therein receiving said inner chamber and having a diameter substantially equal to the outer diameter of said inner chamber, and having a second end plate with an aperture therein receiving said inner chamber and having a diameter substantially equal to the outer diameter of said inner chamber, and further including an intermediate open-ended cylinder concentrically surrounding a portion of said inner chamber within said outer chamber, said intermediate cylinder having a diameter greater than said inner chamber diameter, and having one end in contact with said outer chamber second end plate, and a tube interconnecting the interior of said intermediate cylinder and said outer chamber fuel outlet.
Claim 3
Dependent Claim
72 words
A fuel preheating apparatus according to claim 1 and further including a second intermediate open-ended cylinder concentrically surrounding a portion of said inner chamber within said outer chamber, said second intermediate cylinder having a diameter greater than said inner chamber diameter and having one end in contact with said outer chamber first end plate, and a second tube interconnecting the interior of said second intermediate cylinder and said outer chamber fuel inlet.
Claim 4
Dependent Claim
358 words
A fuel preheating apparatus for use with an internal combustion engine having a closed liquid coolant circuit including a coolant conduit through which heated liquid coolant flows and having a fuel storage tank having a fuel conduit for delivering fuel to the engine, said apparatus comprising: an inner chamber formed of heat conductive material, said inner chamber including a coolant inlet coupled to the coolant conduit for receiving heated liquid coolant from the coolant conduit, and a coolant outlet coupled to the coolant conduit for discharging liquid coolant to the coolant conduit; and an outer chamber surrounding at least a portion of said inner chamber, said outer chamber including a fuel inlet coupled to the fuel conduit for receiving fuel from the fuel storage tank via the fuel conduit, and a fuel outlet coupled to the fuel conduit for discharging fuel to the fuel conduit for delivery to the engine, whereby liquid coolant flows through said inner chamber via said coolant inlet and outelt, thereby heating said inner chamber, and whereby fuel flows through said outer chamber via said fuel inlet and outlet and, via contact with said heated inner chamber, is heated, wherein said inner chamber is in the form of a cylinder, said coolant inlet is a first open end of said cylinder, and said coolant outlet is a second open end of said cylinder, wherein said outer chamber is in the form of a cylinder concentrically surrounding at least a portion of said inner chamber, said outer chamber cylinder having a first end plate with an aperture therein receiving said inner chamber and having a diameter substantially equal to the outer diameter of said inner chamber, and a second end plate with an aperture therein receiving said inner chamber and having a diameter larger than the outer diameter of said inner chamber, said outer chamber further including an exterior chamber extending from said second end plate, said exterior chamber having a diameter substantially equal to said second end plate aperture and having an end plate with an aperture for receiving said inner chamber, and said outer chamber fuel outlet being located in said exterior chamber.
Claim 5
Dependent Claim
358 words
A fuel preheating apparatus for use with an internal combustion engine having a closed liquid coolant circuit including a coolant conduit through which heated liquid coolant flows and having a fuel storage tank having a fuel conduit for delivering fuel to the engine, said apparatus comprising: an inner chamber formed of heat conductive material, said inner chamber including a coolant inlet coupled to the coolant conduit for receiving heated liquid coolant from the coolant conduit, and a coolant outlet coupled to the coolant conduit for discharging liquid coolant to the coolant conduit; and an outer chamber surrounding at least a portion of said inner chamber, said outer chamber including a fuel inlet coupled to the fuel conduit for receiving fuel from the fuel storage tank via the fuel conduit, and a fuel outlet coupled to the fuel conduit for discharging fuel to the fuel conduit for delivery to the engine, whereby liquid coolant flows through said inner chamber via said coolant inlet and outelt, thereby heating said inner chamber, and whereby fuel flows through said outer chamber via said fuel inlet and outlet and, via contact with said heated inner chamber, is heated, wherein said inner chamber is in the form of a cylinder, said coolant inlet is a first open end of said cylinder, and said coolant outlet is a second open end of said cylinder, wherein said outer chamber is in the form of a cylinder concentrically surrounding at least a portion of said inner chamber, said outer chamber cylinder having a first end plate with an aperture therein receiving said inner chamber and having a diameter substantially equal to the outer diameter of said inner chamber, and a second end plate with an aperture therein receiving said inner chamber and having a diameter larger than the outer diameter of said inner chamber, said outer chamber further including an exterior chamber extending from said second end plate, said exterior chamber having a diameter substantially equal to said second end plate aperture and having an end plate with an aperture for receiving said inner chamber, and said outer chamber fuel outlet being located in said exterior chamber.
Claim 6
Dependent Claim
33 words
A fuel preheating apparatus according to claim 1 wherein the ratio of the inside diameter of said inner chamber to the inside diameter of said intermediate chamber is about 1 to about 2.
Claim 7
Dependent Claim
33 words
A fuel preheating apparatus according to claim 3 wherein the ratio of the inside diameter of said inner chamber to the inside diameter of said exterior chamber is about 1 to about 2.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |