Patent US5012775A successfully refreshed from Google Patents.
US5012775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-cycle engine
Assignee: Honda Motor Co Ltd
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Filing: 1989-10-20
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Granted: 1991-05-07
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Expires: 2009-10-20
Abstract
Abstract A two-cycle engine having a crank shaft, a main transmission shaft and a balancer shaft in order to lower the center of gravity and to improve lead valve layout is provided with a casing structure containing an intake passage formed integrally with a crank chamber and a transmission chamber and wherein the intake passage is located in a portion of the casing above the axes of the crank shaft and the main shaft and the balancer shaft is located below such axes.
Inventors
- 👤 Ikuo Oike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:42
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B61/00; F02B61/02; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
123 words
A two-cycle engine comprising: a engine casing containing an integrally formed intake passage, a crank chamber and a transmission chamber, a transmission mechanism having a main shaft in said transmission chamber; a crank shaft in said crank chamber for driving said main shaft; a balancer shaft having a driven gear; a drive gear mounted on said crank shaft for meshing engagement with said driven gear; a side chamber in said engine casing housing said drive gear and said driven gear, including a pressure chamber containing meshing portion of said drive gear and said driven gear whereby the pressure of lubricant oil supplied to said engine is increased; and means for conducting pressurized lubricating oil from said pressure chamber to a point of use.
Claim 2
Dependent Claim
123 words
A two-cycle engine comprising: a engine casing containing an integrally formed intake passage, a crank chamber and a transmission chamber, a transmission mechanism having a main shaft in said transmission chamber; a crank shaft in said crank chamber for driving said main shaft; a balancer shaft having a driven gear; a drive gear mounted on said crank shaft for meshing engagement with said driven gear; a side chamber in said engine casing housing said drive gear and said driven gear, including a pressure chamber containing meshing portion of said drive gear and said driven gear whereby the pressure of lubricant oil supplied to said engine is increased; and means for conducting pressurized lubricating oil from said pressure chamber to a point of use.
Claim 3
Dependent Claim
36 words
A two-cycle engine according to claim 1 in which said balancer shaft is disposed below a level corresponding to that of both the axis of said crank shaft and of the axis of said main shaft.
Claim 4
Dependent Claim
25 words
The two-cycle engine according to claim 2 including clutch means in said side chamber operative to drivingly connect said crank shaft and said main shaft.
Claim 5
Dependent Claim
27 words
The two-cycle engine according to claim 2 including a balancer chamber containing said balancer shaft; and seal means for separating said balancer chamber from said side chamber.
Claim 6
Dependent Claim
25 words
The two-cycle engine according to claim 2 including an oil passage extending from said pressure chamber to said transmission chamber for supplying lubricant oil thereto.
Claim 7
Dependent Claim
32 words
The two-cycle engine according to claim 5 wherein said oil passage includes a portion extending substantially vertically from said pressure chamber and a transverse portion extending substantially laterally to said transmission chamber.
Claim 8
Dependent Claim
36 words
The two-cycle engine according to claim 6 wherein said vertically extending portion of said oil passage comprises a groove formed in said engine casing; and plate means attached to said engine casing and covering said groove.
Claim 9
Dependent Claim
30 words
The two-cycle engine according to claim 7 wherein said transverse portion of said oil passage contains a plurality of appropriately positioned holes for supplying lubricant oil to said transmission chamber.
Claim 10
Dependent Claim
56 words
The two-cycle engine according to claim 7 wherein said plate means contains a first opening for the supply of lubricant oil from said pressure chamber to said oil passage and a plurality of holes for communicating said transverse passage with said transmission chamber whereby lubricant oil is supplied from said side chamber to said transmission chamber.
Claim 11
Dependent Claim
25 words
A two-cycle engine according to claim 1 including clutch means in said side chamber operative to drivingly connect said crank shaft and said main shaft.
Claim 12
Dependent Claim
27 words
The two-cycle engine according to claim 1 including a balancer chamber containing said balancer shaft; and seal means for separating said balancer chamber from said side chamber.
Claim 13
Dependent Claim
25 words
The two-cycle engine according to claim 1 including an oil passage extending from said pressure chamber to said transmission chamber for supplying lubricant oil thereto.
Claim 14
Dependent Claim
32 words
The two-cycle engine according to claim 12 wherein said oil passage includes a portion extending substantially vertically from said pressure chamber and a transverse portion extending substantially laterally to said transmission chamber.
Claim 15
Dependent Claim
36 words
The two-cycle engine according to claim 13 wherein said vertically extending portion of said oil passage comprises a groove formed in said engine casing; and plate means attached to said engine casing and covering said groove.
Claim 16
Dependent Claim
30 words
The two-cycle engine according to claim 14 wherein said transverse portion of said oil passage contains a plurality of appropriately positioned holes for supplying lubricant oil to said transmission chamber.
Claim 17
Dependent Claim
56 words
The two-cycle engine according to claim 14 wherein said plate means contains a first opening for the supply of lubricant oil from said pressure chamber to said oil passage and a plurality of holes for communicating said transverse passage with said transmission chamber whereby lubricant oil is supplied from said side chamber to said transmission chamber.
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) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |