US3762380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine drainage reuse system
Assignee: Old Carco LLC
•
Filing: 1971-03-08
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Granted: 1973-10-02
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Expires: 1991-03-08
Abstract
Abstract A puddle drainage reuse system, particularly for outboard engines, wherein a valve, closed at low engine speeds, is opened at higher engine speeds to allow puddle drainage to mix with the fresh fuel as it flows to the engine.
Inventors
- 👤 W Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:33
CPC Classifications
F; F02; F02M; F02M33/00; F02M33/02; F02B; F02B61/00; F02B61/04; F02B61/045
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
148 words
Apparatus for reuse of the puddle drainage from an internal combustion engine of the two stroke cycle type wherein the crankcase performs the function of an intake manifold and operates relatively cool by reason of the characteristics of the rapid expansion of the fuel air mixture from the carburetor into the crankcase which in turn tends to form more puddle drainage at low fuel air mixture flow velocities than at high velocities, the apparatus comprising: means for collecting the drainage formed at the said low velocities; drainage passage means between the collecting means and the engine fuel system, and valve means in the passage means operable only at the said high velocities for enabling drainage to pass from the collecting means to the engine fuel system whereby the puddle drainage is consumed under conditions of higher compression pressures associated with higher engine speeds and the said high velocities.
Claim 2
Dependent Claim
148 words
Apparatus for reuse of the puddle drainage from an internal combustion engine of the two stroke cycle type wherein the crankcase performs the function of an intake manifold and operates relatively cool by reason of the characteristics of the rapid expansion of the fuel air mixture from the carburetor into the crankcase which in turn tends to form more puddle drainage at low fuel air mixture flow velocities than at high velocities, the apparatus comprising: means for collecting the drainage formed at the said low velocities; drainage passage means between the collecting means and the engine fuel system, and valve means in the passage means operable only at the said high velocities for enabling drainage to pass from the collecting means to the engine fuel system whereby the puddle drainage is consumed under conditions of higher compression pressures associated with higher engine speeds and the said high velocities.
Claim 3
Dependent Claim
27 words
The apparatus according to claim 1 wherein the drainage passage means is connected to the fuel system at a point between the fuel tank and the carburetor.
Claim 4
Dependent Claim
22 words
The apparatus according to claim 1 wherein the drainage passage means is connected to the fuel system at the fuel pump inlet.
Claim 5
Dependent Claim
22 words
The apparatus according to claim 1 wherein: the means for collecting drainage includes means for separating fuel vapors from the liquid drainage.
Claim 6
Dependent Claim
64 words
The combination according to claim 1 wherein the drainage collection system comprises: a drainage collecting chamber for receiving drainage from the engine, the chamber including normally closed drain valve means; a drainage storage chamber for receiving drainage from the collecting chamber when the drain valve means is opened; and means for opening the drain valve means when drainage is received in the collecting chamber.
Claim 7
Dependent Claim
27 words
The combination according to claim 5 wherein the drain valve opening means comprises a float and needle valve arrangement including a valve seat in the collecting chamber.
Claim 8
Dependent Claim
18 words
The combination according to claim 6 wherein the collecting chamber includes vent means for venting drainage vapors therefrom.
Claim 9
Dependent Claim
19 words
The combination according to claim 7 wherein the vent means directs the drainage vapors to the engine induction system.
Claim 10
Dependent Claim
25 words
The combination according to claim 5 wherein the drainage storage chamber comprises a separate section of the main fuel tank of the fuel supply system.
Claim 11
Dependent Claim
17 words
The combination according to claim 5 wherein the drainage storage means is comprised of a separate container.
Claim 12
Dependent Claim
41 words
The combination according to claim 8 wherein the drainage inlet to the storage chamber portion of the fuel tank includes a normally closed float valve which opens when drainage is present in the chamber and closes when the chamber is empty.
Claim 13
Dependent Claim
37 words
The combination according to claim 1 wherein the valve means and the control means together comprise a normally closed valve and means responsive to engine speed for opening the valve when the speed exceeds the predetermined speed.
Claim 14
Dependent Claim
28 words
The combination according to claim 12 wherein the means responsve to engine speed comprises a mechanical linkage arrangement connected to the engine throttle control means and actuated thereby.
Claim 15
Dependent Claim
35 words
The combination according to claim 1 wherein the valve means is normally closed and is of the pressure operated type suitable for sensing pressure differentials at various engine speeds and opening at the predetermined speed.
Claim 16
Dependent Claim
26 words
The combination according to claim 1 wherein the drainage passage means connection point to the fuel supply system is between the fuel tank and the carburetor.
Claim 17
Dependent Claim
24 words
The combination according to claim 1 wherein the drainage passage means connection point to the fueL supply system is at the fuel pump inlet.
Claim 18
Dependent Claim
48 words
The combination according to claim 15 wherein the fuel pump includes an inlet fitting having two inlet connections, the engine fuel supply being connected to one and the drainage passage means being connected to the other, whereby the two fluids are inducted and mixed at the fuel pump.
Claim 19
Dependent Claim
45 words
The combination according to claim 15 wherein the inside diameter of the two fuel pump inlets are sized relative to each other whereby the drainage is metered into the fuel to provide a predetermined ratio of fresh fuel to drainage fuel flowing to the engine.
Claim 20
Dependent Claim
31 words
The combination according to claim 15 wherein a metered fitting is installed in the passage means to provide a predetermined ratio of fresh fuel to drainage fuel flowing to the engine.
Claim 21
Dependent Claim
20 words
The combination according to claim 5 wherein the drainage storage chamber comprises flexible bag means adapted to receive the drainage.
Claim 22
Dependent Claim
26 words
The combination according to claim 19 including a standard fuel tank with the bag means supported in the filler neck thereof and carried inside the tank.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |