US4483303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for regulating fuel supply to liquefied petroleum gas engine
Assignee: Nikki Co Ltd
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Filing: 1983-03-02
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Granted: 1984-11-20
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Expires: 2003-03-02
Abstract
Abstract An apparatus for regulating fuel supply to a liquefied petroleum gas engine comprising a housing divided by a lower chamber passing through the fuel in liquid phase from a fuel supply to a vaporizer and an upper chamber connected to a carburetor of the engine passing through the fuel in gas phase from the vaporizer to the carburetor by a partition wall having a passage therein, the composition of the fuel being determined in temperature and vapor pressure of the fuel in liquid phase in the lower chamber, the flow of the fuel in gas phase from the passage in the partition wall to the upper chamber being controlled by valve means actuated in response to the temperature and the pressure of the fuel in liquid phase.
Inventors
- 👤 Norikazu Ishikawa
- 👤 Masanori Fujisaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:28
CPC Classifications
F; F02; F02B; F02B43/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
158 words
In an apparatus for regulating the fuel supply to a liquefied petroleum gas engine, which apparatus is to be disposed in a fuel supply system including a supply of the liquefied petroleum gas fuel in liquid phase, a vaporizer for converting the fuel in liquid phase into the fuel in gas phase and regulating its pressure, and a carburetor for mixing the fuel in gas phase with air and supplying the mixture to the engine, the improvement comprising: (A) a first valve means for regulating the flow of the fuel supplied from said vaporizer to said carburetor in response to the temperature of the fuel in liquid phase being fed from said fuel supply to said vaporizer; and (B) a second valve means for regulating the flow of the fuel supplied from said vaporizer to said carburetor in response to the vapor pressure of the fuel in liquid phase being fed from said fuel supply to said vaporizer.
Claim 2
Dependent Claim
158 words
In an apparatus for regulating the fuel supply to a liquefied petroleum gas engine, which apparatus is to be disposed in a fuel supply system including a supply of the liquefied petroleum gas fuel in liquid phase, a vaporizer for converting the fuel in liquid phase into the fuel in gas phase and regulating its pressure, and a carburetor for mixing the fuel in gas phase with air and supplying the mixture to the engine, the improvement comprising: (A) a first valve means for regulating the flow of the fuel supplied from said vaporizer to said carburetor in response to the temperature of the fuel in liquid phase being fed from said fuel supply to said vaporizer; and (B) a second valve means for regulating the flow of the fuel supplied from said vaporizer to said carburetor in response to the vapor pressure of the fuel in liquid phase being fed from said fuel supply to said vaporizer.
Claim 3
Dependent Claim
49 words
An apparatus for regulating the fuel supply to a liquefied petroleum gas engine as claimed in claim 1 wherein said first valve means is arranged so as to regulate the flow of the fuel in gas phase in inverse proportion to the temperature of the fuel in liquid phase.
Claim 4
Dependent Claim
38 words
An apparatus as claimed in claim 1 wherein said second valve means is arranged so as to regulate the flow of the fuel in gas phase in proportion to the vapor pressure of the fuel in liquid phase.
Claim 5
Dependent Claim
28 words
An apparatus as claimed in claim 1 wherein said first valve means is actuated by means of the expansion or contraction of wax in a temperature sensing means.
Claim 6
Dependent Claim
29 words
An apparatus as claimed in claim 1 wherein said second valve means is actuated by means of bellows which sense the vapor pressure of the fuel in liquid phase.
Claim 7
Dependent Claim
30 words
An apparatus as claimed in claim 1 which further includes a third valve means for regulating the flow of the fuel in gas phase from said vaporizer to said carburetor.
Claim 8
Independent Claim
181 words
An apparatus for regulating fuel supply to a liquefied petroleum gas engine comprising a housing; a partition wall dividing said housing into a lower chamber for providing a passage of the fuel in liquid phase from a fuel supply to a vaporizer and an upper chamber for providing a passage of the fuel in gas phase from said vaporizer to a carburetor; a passage of the fuel in gas phase provided in said partition wall; a first opening and a second opening provided in said passage in said partition wall; a means for sensing the temperature of the fuel in liquid phase passing through said lower chamber; a means for sensing the vapor pressure of the fuel in liquid phase passing through said lower chamber; a first valve means provided in said passage in said partition wall for regulating the fuel flow of said first opening in cooperation with said temperature sensing means; a second valve means provided in said passage in said partition wall for regulating the fuel flow of said second opening in cooperation with said pressure sensing means.
Claim 9
Independent Claim
181 words
An apparatus for regulating fuel supply to a liquefied petroleum gas engine comprising a housing; a partition wall dividing said housing into a lower chamber for providing a passage of the fuel in liquid phase from a fuel supply to a vaporizer and an upper chamber for providing a passage of the fuel in gas phase from said vaporizer to a carburetor; a passage of the fuel in gas phase provided in said partition wall; a first opening and a second opening provided in said passage in said partition wall; a means for sensing the temperature of the fuel in liquid phase passing through said lower chamber; a means for sensing the vapor pressure of the fuel in liquid phase passing through said lower chamber; a first valve means provided in said passage in said partition wall for regulating the fuel flow of said first opening in cooperation with said temperature sensing means; a second valve means provided in said passage in said partition wall for regulating the fuel flow of said second opening in cooperation with said pressure sensing means.
Claim 10
Dependent Claim
30 words
An apparatus as claimed in claim 7 wherein a third opening is provided in said passage in said partition wall and third valve means is provided in said third opening.
Claim 11
Dependent Claim
30 words
An apparatus as claimed in claim 7 wherein said first valve means is actuated by means of the thermal expansion and contraction of wax contained in said temperature sensing means.
Claim 12
Dependent Claim
24 words
An apparatus as claimed in claim 7 wherein said second valve means is actuated by means of bellows arranged in said pressure sensing means.
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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |