Patent US4741303A successfully refreshed from Google Patents.
US4741303A
Expired / Lapsed
US
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Combination counterbalance and oil slinger for horizontal shaft engines
Assignee: Tecumseh Products Co
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Filing: 1986-10-14
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Granted: 1988-05-03
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Expires: 2006-10-14
Abstract
Abstract A combination counterbalancing and oil slinger mechanism located in the sump of a horizontal shaft internal combustion engine having two slinger counterweights radially connected on a slinger shaft. As the counterbalancing oil slinger rotates, it both counterbalances the inertial forces created by the moving parts of the engine and also lubricates the same moving parts by throwing lubricating fluid towards them. A deflector situated partially above the counterbalancing oil slinger directs the lubricating fluid towards the critical bearing points of the moving parts. A restricting wall in the engine sump controls the quantity of lubricating fluid flowing into the oil slinger well.
Inventors
- 👤 Peter G. Kronich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:19
CPC Classifications
F; F01; F01M; F01M9/00; F01M9/06; F02; F02B; F02B75/00; F02B75/16; F16; F16F; F16F15/00; F16F15/22; F16F15/26; F16F15/264; F16F15/267; F02B67/00; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2173; Y10T74/2183
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
198 words
In an internal combustion engine including a crankcase having moving parts therein including a piston, a connecting rod pivotally connected to said piston, a substantially horizontally disposed rotatable crankshaft pivotally connected to said connecting rod, and a crankshaft counterweight connected to said crankshaft, and a lubricating fluid sump below said moving parts, a counterbalancing and lubricating mechanism comprising: lubricating fluid in said sump; an eccentric member rotatably mounted substantially parallel to said crankshaft in said sump and substantially vertically in line below said piston and said crankshaft, said eccentric member being disposed in said sump; drive means coupling together said crankshaft and said eccentric member for rotatably driving said eccentric member in counterrotation to said crankshaft to balance forces created by said moving parts, said eccentric member including slinger means thereon for throwing lubricating fluid from the sump towards said moving parts; wherein said lubricating fluid is at a level vertically below the highest rotational point of said slinger means during operation of said engine; and, deflector means extending at least partially above the level of the lubricating fluid and being at least partially positioned above said eccentric member for directing thrown lubricating fluid towards said moving parts.
Claim 2
Dependent Claim
198 words
In an internal combustion engine including a crankcase having moving parts therein including a piston, a connecting rod pivotally connected to said piston, a substantially horizontally disposed rotatable crankshaft pivotally connected to said connecting rod, and a crankshaft counterweight connected to said crankshaft, and a lubricating fluid sump below said moving parts, a counterbalancing and lubricating mechanism comprising: lubricating fluid in said sump; an eccentric member rotatably mounted substantially parallel to said crankshaft in said sump and substantially vertically in line below said piston and said crankshaft, said eccentric member being disposed in said sump; drive means coupling together said crankshaft and said eccentric member for rotatably driving said eccentric member in counterrotation to said crankshaft to balance forces created by said moving parts, said eccentric member including slinger means thereon for throwing lubricating fluid from the sump towards said moving parts; wherein said lubricating fluid is at a level vertically below the highest rotational point of said slinger means during operation of said engine; and, deflector means extending at least partially above the level of the lubricating fluid and being at least partially positioned above said eccentric member for directing thrown lubricating fluid towards said moving parts.
Claim 3
Dependent Claim
57 words
The counterbalancing and lubricating mechanism of claim 1 wherein said slinger means comprises a slinger face extending substantially radially outwardly from the axis of said eccentric member so that as said face rotates with said eccentric member said face dips into lubricating fluid in the sump and throws lubricating fluid from the sump towards said moving parts.
Claim 4
Dependent Claim
39 words
The counterbalancing and lubricating mechanism of claim 2 wherein said eccentric member comprises: a slinger shaft portion; a slinger counterweight portion extending radially from said shaft portion; and wherein said slinger face is located on said slinger counterweight portion.
Claim 5
Dependent Claim
96 words
The counterbalancing and lubricating mechanism of claim 1 wherein said drive means includes a crankshaft gear axially connected to said crankshaft and a slinger gear having substantially the same diameter as said crankshaft gear axially connected to said eccentric member and, wherein said crankshaft gear and said slinger gear are coupled together so that said eccentric member rotates at substantially the same rotational speed as said crankshaft and in opposite direction thereof and so that said eccentric member and said crankshaft counterweight are directionally aligned at substantially top dead center and bottom dead center piston positions.
Claim 6
Dependent Claim
163 words
In an internal combustion engine including a crankcase having moving parts therein including a piston, a connecting rod pivotally connected to said piston, a substantially horizontally disposed rotatable crankshaft pivotally connected to said connecting rod, and a crankshaft counterweight connected to said crankshaft, and a lubricating fluid sump below said moving parts for retaining therein lubricating fluid, a counterbalancing and lubricating mechanism comprising: an eccentric member rotatably mounted substantially parallel to said crankshaft in said sump and substantially vertically in line below said piston and said crankshaft, said eccentric member being disposed in said sump; drive means coupling together said crankshaft and said eccentric member for rotatably driving said eccentric member in counterrotation to said crankshaft to balance forces created by said moving parts, said eccentric member including slinger means thereon for throwing lubricating fluid from the sump towards said moving parts; and, restriction means in said sump for controlling the quantity of lubrication fluid which comes in contact with said slinger means.
Claim 7
Dependent Claim
163 words
In an internal combustion engine including a crankcase having moving parts therein including a piston, a connecting rod pivotally connected to said piston, a substantially horizontally disposed rotatable crankshaft pivotally connected to said connecting rod, and a crankshaft counterweight connected to said crankshaft, and a lubricating fluid sump below said moving parts for retaining therein lubricating fluid, a counterbalancing and lubricating mechanism comprising: an eccentric member rotatably mounted substantially parallel to said crankshaft in said sump and substantially vertically in line below said piston and said crankshaft, said eccentric member being disposed in said sump; drive means coupling together said crankshaft and said eccentric member for rotatably driving said eccentric member in counterrotation to said crankshaft to balance forces created by said moving parts, said eccentric member including slinger means thereon for throwing lubricating fluid from the sump towards said moving parts; and, restriction means in said sump for controlling the quantity of lubrication fluid which comes in contact with said slinger means.
Claim 8
Dependent Claim
53 words
The counterbalancing and lubricating mechanism of claim 5 wherein said restriction means includes a barrier in said sump dividing said lubricating fluid sump into a slinger sump portion and a reservoir sump portion, said barrier defining an opening through which lubricating fluid in said reservoir sump portion flows into said slinger sump portion.
Claim 9
Dependent Claim
29 words
The counterbalancing and lubricating mechanism of claim 6 wherein said barrier is integral with said crankcase and wherein said opening is a gap between said barrier and the crankcase.
Claim 10
Dependent Claim
167 words
In an internal combustion engine including a crankcase having moving parts therein including a piston, a connecting rod pivotally connected to said piston, a substantially horizontally disposed rotatable crankshaft pivotally connected to said connecting rod, and a crankshaft counterweight connected to said crankshaft, and a lubricating fluid sump below said moving parts for retaining therein lubricating fluid, a counterbalancing and lubricating mechanism comprising: an eccentric member rotatably mounted substantially parallel to said crankshaft in said sump and substantially vertically in line below said piston and said crankshaft, said eccentric member being disposed in said sump; drive means coupling together said crankshaft and said eccentric member for rotatably driving said eccentric member in counterrotation to said crankshaft to balance forces created by said moving parts, said eccentric member including slinger means thereon for throwing lubricating fluid from the sump towards said moving parts; and, deflector means at least partially positioned above said eccentric member and connected to the crankcase for directing thrown lubricating fluid towards said moving parts.
Claim 11
Dependent Claim
167 words
In an internal combustion engine including a crankcase having moving parts therein including a piston, a connecting rod pivotally connected to said piston, a substantially horizontally disposed rotatable crankshaft pivotally connected to said connecting rod, and a crankshaft counterweight connected to said crankshaft, and a lubricating fluid sump below said moving parts for retaining therein lubricating fluid, a counterbalancing and lubricating mechanism comprising: an eccentric member rotatably mounted substantially parallel to said crankshaft in said sump and substantially vertically in line below said piston and said crankshaft, said eccentric member being disposed in said sump; drive means coupling together said crankshaft and said eccentric member for rotatably driving said eccentric member in counterrotation to said crankshaft to balance forces created by said moving parts, said eccentric member including slinger means thereon for throwing lubricating fluid from the sump towards said moving parts; and, deflector means at least partially positioned above said eccentric member and connected to the crankcase for directing thrown lubricating fluid towards said moving parts.
Claim 12
Dependent Claim
38 words
The counterbalancing and lubricating mechanism of claim 8 wherein said deflector means includes a deflector wall member, said deflector wall defining an opening to permit lubricating fluid above said deflector wall to travel back towards said eccentric member.
Claim 13
Dependent Claim
173 words
In an internal combustion engine including a crankcase having moving parts therein including a piston, a connecting rod pivotally connected to said piston, a substantially horizontally disposed rotatable crankshaft pivotally connected to said connecting rod, and a crankshaft counterweight on said crankshaft, and a lubricating fluid sump below said moving parts for retaining therein lubricating fluid, a counterbalancing and lubricating mechanism comprising: an oil slinger including a slinger shaft and an eccentric slinger counterweight connected radially outwardly on said slinger shaft, said oil slinger rotatably mounted substantially parallel to said crankshaft in said sump and substantially vertically in line below said piston and said crankshaft; drive means coupling together said crankshaft and said oil slinger for rotatably driving said oil slinger in counterrotation to said crankshaft to balance forces created by said moving parts, and to cause said slinger counterweight to throw lubricating fluid upwardly from said sump as said slinger counterweight rotates; and deflector means at least partially positioned above said oil slinger for directing thrown lubricating fluid towards the moving parts.
Claim 14
Dependent Claim
173 words
In an internal combustion engine including a crankcase having moving parts therein including a piston, a connecting rod pivotally connected to said piston, a substantially horizontally disposed rotatable crankshaft pivotally connected to said connecting rod, and a crankshaft counterweight on said crankshaft, and a lubricating fluid sump below said moving parts for retaining therein lubricating fluid, a counterbalancing and lubricating mechanism comprising: an oil slinger including a slinger shaft and an eccentric slinger counterweight connected radially outwardly on said slinger shaft, said oil slinger rotatably mounted substantially parallel to said crankshaft in said sump and substantially vertically in line below said piston and said crankshaft; drive means coupling together said crankshaft and said oil slinger for rotatably driving said oil slinger in counterrotation to said crankshaft to balance forces created by said moving parts, and to cause said slinger counterweight to throw lubricating fluid upwardly from said sump as said slinger counterweight rotates; and deflector means at least partially positioned above said oil slinger for directing thrown lubricating fluid towards the moving parts.
Claim 15
Dependent Claim
58 words
The counterbalancing and lubricating mechanism of claim 10 wherein said slinger counterweight includes a slinger face surface extending substantially radially outwardly from said slinger shaft whereby, as said slinger face surface rotates with said slinger counterweight, said slinger face comes in contact with said lubricating fluid in said sump and throws the lubricating fluid towards the moving parts.
Claim 16
Dependent Claim
37 words
The counterbalancing and lubricating mechanism of claim 10 further comprising restriction means in said sump for controlling the quantity of lubricating fluid which comes in contact with said oil slinger and is thrown towards said moving parts.
Claim 17
Dependent Claim
55 words
The counterbalancing and lubricating mechanism of claim 12 wherein said restriction means includes a restricting wall in said sump dividing said lubricating fluid sump into a slinger sump portion and a reservoir sump portion, said restricting wall defining an opening through which lubricating fluid in said reservoir sump portion flows into said slinger sump portion.
Claim 18
Dependent Claim
35 words
The counterbalancing and lubricating mechanism of claim 13 wherein said restricting wall is integral with the crankcase and wherein said opening is a gap substantially between said restricting wall and the crankcase of said engine.
Claim 19
Dependent Claim
42 words
The counterbalancing and lubricating mechanism of claim 10 wherein said deflector means includes a deflector wall member integral with the crankcase, said deflector wall member having an opening whereby lubricating fluid above said deflector wall member travels back towards said oil slinger.
Claim 20
Dependent Claim
100 words
The counterbalancing and lubricating mechanism of claim 10 wherein said drive means includes a crankshaft gear axially connected to said crankshaft and a slinger gear having substantially the same diameter as said crankshaft gear axially connected to said oil slinger and coupled with said crankshaft gear, wherein said crankshaft gear and said slinger gear are coupled so that said oil slinger rotates at substantially the same rotational speed as said crankshaft in the opposite direction thereof and so that said slinger counterweight and said crankshaft counterweight are directionally aligned at substantially top dead center and bottom dead center piston positions.
Claim 21
Dependent Claim
188 words
In an internal combustion engine including a crankcase having moving parts therein including a piston, a connecting rod pivotally connected to said piston, a substantially horizontally disposed rotatable crankshaft pivotally connected to said connecting rod, and a crankshaft counterweight connected to said crankshaft, and a lubricating fluid sump below said moving parts for retaining therein lubricating fluid, a counterbalancing lubricating apparatus comprising: an oil slinger including a slinger shaft and a slinger counterweight connected radially onto said slinger shaft, said oil slinger rotatably mounted substantially parallel to said crankshaft in said sump and substantially vertically in line below said piston and said crankshaft; drive means coupling together said crankshaft and said oil slinger for rotatably driving said oil slinger in counterrotation to said crankshaft to balance forces created by said moving parts, and to cause said slinger counterweight to throw lubricating fluid from said sump radially outwardly as said slinger counterweight rotates; and restricting means connected to said sump for restricting the quantity of lubricating fluid which comes in contact with said slinger counterweight and restricting the quantity of lubricating fluid which is thrown by said slinger counterweight.
Claim 22
Dependent Claim
188 words
In an internal combustion engine including a crankcase having moving parts therein including a piston, a connecting rod pivotally connected to said piston, a substantially horizontally disposed rotatable crankshaft pivotally connected to said connecting rod, and a crankshaft counterweight connected to said crankshaft, and a lubricating fluid sump below said moving parts for retaining therein lubricating fluid, a counterbalancing lubricating apparatus comprising: an oil slinger including a slinger shaft and a slinger counterweight connected radially onto said slinger shaft, said oil slinger rotatably mounted substantially parallel to said crankshaft in said sump and substantially vertically in line below said piston and said crankshaft; drive means coupling together said crankshaft and said oil slinger for rotatably driving said oil slinger in counterrotation to said crankshaft to balance forces created by said moving parts, and to cause said slinger counterweight to throw lubricating fluid from said sump radially outwardly as said slinger counterweight rotates; and restricting means connected to said sump for restricting the quantity of lubricating fluid which comes in contact with said slinger counterweight and restricting the quantity of lubricating fluid which is thrown by said slinger counterweight.
Claim 23
Dependent Claim
59 words
The counterbalancing and lubricating mechanism of claim 17 wherein said slinger counterweight includes a slinger face extending substantially radially outwardly from said slinger shaft of said oil slinger whereby as said slinger face rotates with said oil slinger, said slinger face contacts said lubricating fluid in said sump and throws said lubricating fluid radially outwardly towards said moving parts.
Claim 24
Dependent Claim
55 words
The counterbalancing and lubricating mechanism of claim 17 wherein said restricting means includes a restricting wall connected to said sump dividing said lubricating fluid sump into a slinger sump portion and a reservoir sump portion, said restricting wall having an opening whereby lubricating fluid in said reservoir sump portion flows into said slinger sump portion.
Claim 25
Dependent Claim
29 words
The counterbalancing and lubricating mechanism of claim 17 further comprising deflector means at least partially positioned above said oil slinger for directing thrown lubricating fluid towards said moving parts.
Claim 26
Dependent Claim
43 words
The counterbalancing and lubricating mechanism of claim 20 wherein said deflector means includes a deflector wall member integral with the crankcase, said deflector wall member having an opening through which lubricating fluid above said deflector wall member travels back towards said oil slinger.
Claim 27
Dependent Claim
100 words
The counterbalancing and lubricating mechanism of claim 17 wherein said drive means includes a crankshaft gear axially connected to said crankshaft and a slinger gear having substantially the same diameter as said crankshaft gear axially connected to said oil slinger and coupled with said crankshaft gear, wherein said crankshaft gear and said slinger gear are coupled so that said oil slinger rotates at substantially the same rotational speed as said crankshaft and in opposite direction thereof and so that said slinger counterweight and said crankshaft counterweight are directionally aligned at substantially top dead center and bottom dead center piston positions.
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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) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |