Patent US3698367A successfully refreshed from Google Patents.
US3698367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas carburetor valve
Assignee: Allan Pump and Supply Inc
•
Filing: 1971-06-21
•
Granted: 1972-10-17
•
Expires: 1991-06-21
Abstract
Abstract A gaseous fuel carburetion device utilized with a reciprocating piston engine fueled with low pressure gas; the valve having a first check valve connecting to atmosphere allowing outside air to be sucked in but preventing the low pressure gas from flowing into the atmosphere, and a second check valve connecting with the intake of the engine allowing air and gas to flow into the engine only on the suction stroke, and a needle valve controlling the maximum rate of gas flow from the source.
Inventors
- 👤 Orval L Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:04
CPC Classifications
F; F02; F02M; F02M21/00; F02M21/02; F02M21/04; F02M35/00; F02M35/10; F02M35/10242; F02M35/10275; F02B; F02B43/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/30; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87652; Y10T137/8766
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
A gaseous fuel carburetion valve connecting a low pressure gas supply to the intake manifold of a reciprocating engine comprising: a body member having a main passage connecting the intake manifold to atmospheric air; a gas supply passage intersecting the main passage; a first check valve positioned in the main passage so as to prevent any of the low pressure gas from flowing from the main passage to atmospheric air and an opening to allow atmospheric air to be suckEd into the engine through the main passage; and a second check valve in the main passage between the gas supply passage and the intake manifold allowing gas to flow into the intake manifold.
Claim 2
Dependent Claim
113 words
A gaseous fuel carburetion valve connecting a low pressure gas supply to the intake manifold of a reciprocating engine comprising: a body member having a main passage connecting the intake manifold to atmospheric air; a gas supply passage intersecting the main passage; a first check valve positioned in the main passage so as to prevent any of the low pressure gas from flowing from the main passage to atmospheric air and an opening to allow atmospheric air to be suckEd into the engine through the main passage; and a second check valve in the main passage between the gas supply passage and the intake manifold allowing gas to flow into the intake manifold.
Claim 3
Dependent Claim
26 words
A carburetion valve as set forth in claim 1, wherein the two check valves are of the ball type requiring a minimum back pressure to open.
Claim 4
Dependent Claim
44 words
A carburetion valve as set forth in claim 1, including a flow restricting valve in the supply passage, the second check valve being a ball type and having a weight sufficient to prevent opening of the check valve by the low pressure gas supply.
Claim 5
Dependent Claim
52 words
A carburetion valve as set forth in claim 1, wherein the second check valve is a ball type having sufficient weight not to open under the low pressure gas supply and the first check valve is of the ball type having a lightweight ball which will open under a minimum pressure differential.
Claim 6
Dependent Claim
37 words
A carburetion valve as set forth in claim 1, the first and second check valves being of the ball type with balls having sufficient weight not to open under pressures less than 4 ounces per square inch.
Claim 7
Dependent Claim
67 words
A carburetion valve as set forth in claim 1, including a flow restricting valve in the supply passage, the first and second check valves being of the ball type having an O-ring seat, the portions of the main passage immediately upstream of the O-ring seats having an outward taper whereby the opening of the check valve becomes greater as the ball moves away from its respective seat.
Claim 8
Dependent Claim
84 words
A carburetion valve as set forth in claim 1, including a flow restricting valve in the supply passage, the first and second check valves being of the ball type having an O-ring seat, the portions of the main passage immediately upstream of the O-ring seats having an outward taper whereby the opening of the check valve becomes greater as the ball moves away from its respective seat, and removable stop means in the main passage limiting the upward movement of the check valve balls.
Claim 9
Dependent Claim
38 words
A carburetion valve as set forth in claim 1, including a needle valve positioned in the supply passage, the first and second check valves being steel balls of at least 1 inch in diameter resting on O-ring seats.
Claim 10
Dependent Claim
51 words
A carburetion valve as set forth in claim 1, including a flow restricting valve in the supply passage, the second check valve having a cracking pressure of at least 4 ounces per square inch, and the first check valve having a cracking pressure of less than 4 ounces per square inch.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |