US3870008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine ventilation of boat bilges
Assignee: Individual
•
Filing: 1973-11-21
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Granted: 1975-03-11
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Expires: 1993-11-21
Abstract
Abstract A system for ventilating the bilge of a closed boat which is powered by a confined inboard gasoline engine having a down draft carburetor. Engine air is supplied by a dual air source formed by a first fluid passage conduit extending from approximate floor level in the bilge to the air inlet of the carburetor and a second fluid passage conduit extending from the second fluid passage through an engine compartment wall isolating the engine from open atmosphere. A valve is located in the second fluid passage to close normally that passage when fluid flow occurs in the first passage. The valve opens to draw air from open atmosphere through the second passage in response to an obstruction in the first fluid passage. Accordingly, the bilge supplies engine aspirating air until the bilge is flooded by water, for example, and then engine air is supplied by open atmosphere.
Inventors
- 👤 Edward D Wilkerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:59
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/16; F02M35/165; F02M35/167; F02M35/168; B; B63; B63J; B63J2/00; B63J2/02; B63J2/06; F02M35/10; F02M35/10006; F02M35/10013; F02M35/10242; F02M35/10255; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
160 words
In a system for ventilating the bilge of a closed boat which is powered by a confined inboard gasoline engine having a down draft carburetor supplied by an air source, the improvement in the carburetor aspirating air source comprising an air passage conduit extending from a low level of the bilge to an air inlet of the carburetor to provide a first carburetor aspirating air source, and a normally closed valve actuatable to an open position in response to a predetermined air pressure differential, said valve being located in a second fluid passage conduit to close normally said second passage when air flow occurs in the first passage with the valve opening to draw air from open atmosphere through the second passage in response to an obstruction in the first air passage which produces the predetermined air pressure differential, whereby the bilge supplies carburetor aspirating air until an obstruction occurs at which time air is then supplied by open atmosphere.
Claim 2
Dependent Claim
160 words
In a system for ventilating the bilge of a closed boat which is powered by a confined inboard gasoline engine having a down draft carburetor supplied by an air source, the improvement in the carburetor aspirating air source comprising an air passage conduit extending from a low level of the bilge to an air inlet of the carburetor to provide a first carburetor aspirating air source, and a normally closed valve actuatable to an open position in response to a predetermined air pressure differential, said valve being located in a second fluid passage conduit to close normally said second passage when air flow occurs in the first passage with the valve opening to draw air from open atmosphere through the second passage in response to an obstruction in the first air passage which produces the predetermined air pressure differential, whereby the bilge supplies carburetor aspirating air until an obstruction occurs at which time air is then supplied by open atmosphere.
Claim 3
Dependent Claim
160 words
In a system for ventilating the bilge of a closed boat which is powered by a confined inboard gasoline engine having a down draft carburetor supplied by an air source, the improvement in the carburetor aspirating air source comprising an air passage conduit extending from a low level of the bilge to an air inlet of the carburetor to provide a first carburetor aspirating air source, and a normally closed valve actuatable to an open position in response to a predetermined air pressure differential, said valve being located in a second fluid passage conduit to close normally said second passage when air flow occurs in the first passage with the valve opening to draw air from open atmosphere through the second passage in response to an obstruction in the first air passage which produces the predetermined air pressure differential, whereby the bilge supplies carburetor aspirating air until an obstruction occurs at which time air is then supplied by open atmosphere.
Claim 4
Dependent Claim
160 words
In a system for ventilating the bilge of a closed boat which is powered by a confined inboard gasoline engine having a down draft carburetor supplied by an air source, the improvement in the carburetor aspirating air source comprising an air passage conduit extending from a low level of the bilge to an air inlet of the carburetor to provide a first carburetor aspirating air source, and a normally closed valve actuatable to an open position in response to a predetermined air pressure differential, said valve being located in a second fluid passage conduit to close normally said second passage when air flow occurs in the first passage with the valve opening to draw air from open atmosphere through the second passage in response to an obstruction in the first air passage which produces the predetermined air pressure differential, whereby the bilge supplies carburetor aspirating air until an obstruction occurs at which time air is then supplied by open atmosphere.
Claim 5
Dependent Claim
37 words
The combination of claim 1 in which the engine is confined within an engine compartment, and the first air passage is formed generally by a conduit having an inlet opening at approximate lowest level in the bilge.
Claim 6
Dependent Claim
19 words
The combination of claim 2 in which the first air passage conduit is of generally an inverted U-shaped construction.
Claim 7
Dependent Claim
33 words
The combination of claim 2 in which the second air passage conduit is a duct extending between the first air passage conduit and an engine compartment wall isolating the engine from open atmosphere.
Claim 8
Dependent Claim
24 words
The combination of claim 2 in which the valve is a weighted bufferfly flap pivoted to a closed position by the force of gravity.
Claim 9
Dependent Claim
33 words
The combination of claim 3 in which the second air passage conduit is a duct extending between the first air passage conduit and an engine compartment wall isolating the engine from open atmosphere.
Claim 10
Dependent Claim
20 words
The combination of claim 3 in which the valve is a weighted butterfly flap pivotally biased to a closed position.
References Cited (Backward Citations)
US1813255A
Cited
US3796180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |