US5065644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counterbalance mechanism for internal combustion engine
Assignee: Honda Motor Co Ltd
•
Filing: 1989-07-05
•
Granted: 1991-11-19
•
Expires: 2009-07-05
Abstract
Abstract An internal combustion engine has a crankshaft, a clutch, and a transmission including a main shaft rotatable by the crankshaft through the clutch and a countershaft rotatable by the main shaft through gears. A counterbalance mechanism includes at least a primary counterweight rotatable in synchronism with the crankshaft, and a hollow shaft rotatably supported concentrically on the main shaft, the primary counterweight being integrally mounted on the hollow shaft, the clutch being corotatably mounted on the hollow shaft and operatively coupled to the crankshaft at the same speed as and in the opposite direction to the crankshaft.
Inventors
- 👤 Toshio Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:46
CPC Classifications
F; F02; F02B; F02B61/00; F02B61/02; F02B75/00; F02B75/16; F16; F16F; F16F15/00; F16F15/22; F16F15/26; F16F15/264; F16F15/268; F02B75/02; F02B2075/022; F02B2075/027; F02F; F02F1/00; F02F1/24; F02F2001/244; F02F2001/245; F02F2001/246; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2173; Y10T74/2183
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A counterbalance mechanism in an internal combustion engine having a crankshaft, a clutch, and a transmission including a main shaft rotatable by the crankshaft through the clutch and a countershaft rotatable by the main shaft through gears, said counterbalance mechanism comprising: at least a primary counterweight rotatable in synchronism with the crankshaft; a hollow shaft rotatably supported concentrically on the main shaft, said primary counterweight being integrally formed with said hollow shaft; and said clutch being co-rotatably mounted on said hollow shaft and operatively coupled to the crankshaft at the same speed as and in the opposite direction to the crankshaft.
Claim 2
Dependent Claim
101 words
A counterbalance mechanism in an internal combustion engine having a crankshaft, a clutch, and a transmission including a main shaft rotatable by the crankshaft through the clutch and a countershaft rotatable by the main shaft through gears, said counterbalance mechanism comprising: at least a primary counterweight rotatable in synchronism with the crankshaft; a hollow shaft rotatably supported concentrically on the main shaft, said primary counterweight being integrally formed with said hollow shaft; and said clutch being co-rotatably mounted on said hollow shaft and operatively coupled to the crankshaft at the same speed as and in the opposite direction to the crankshaft.
Claim 3
Dependent Claim
52 words
A counterbalance mechanism according to claim 1, further including a primary driven gear corotatably coupled to said clutch and a primary drive gear mounted on the crankshaft and held in mesh with said primary driven gear, whereby the clutch is operatively coupled to the crankshaft through said primary driven and drive gears.
Claim 4
Dependent Claim
32 words
A counterbalance mechanism according to claim 1, wherein said counterweight is mounted on one end of said hollow shaft, and the clutch is mounted on the other end of said hollow shaft.
Claim 5
Dependent Claim
65 words
A counterbalance mechanism according to claim 1, wherein said counterweight is integrally mounted on one end of said hollow shaft, and the clutch is fitted over the other end of said hollow shaft, further including a case accommodating the transmission therein, said one end of the hollow shaft being housed in said case, said other end of the hollow shaft projecting out of said case.
Claim 6
Dependent Claim
31 words
A counterbalance mechanism according to claim 1, further including an other counterweight, and a drive gear for rotating said other counterweight, said drive gear being integrally formed on said hollow shaft.
Claim 7
Dependent Claim
15 words
A counterbalance mechanism according to claim 5, wherein said other counterweight comprises a secondary counterweight.
Claim 8
Dependent Claim
39 words
A counterbalance mechanism according to claim 6, further including a driven gear integral with said secondary counterweight and held in mesh with said drive gear, said primary counterweight being rotatably disposed between said secondary counterweight and said driven gear.
Claim 9
Dependent Claim
18 words
A counterbalance mechanism according to claim 1, wherein said primary counterweight is integrally formed on said hollow shaft.
Claim 10
Dependent Claim
45 words
A counterbalance mechanism according to claim 1, further including a primary drive gear mounted on the crankshaft shaft and held in mesh with said primary drive gear operably coupling the crankshaft and said clutch, said primary counterweight being integrally formed with said primary driven gear.
Claim 11
Dependent Claim
62 words
A counterbalance mechanism according to claim 9, wherein the engine further includes an intermediate shaft adjacent the main shaft, a shaft drive gear mounted on said intermediate shaft in mesh with said primary driven gear, and a device including a member mounted on said intermediate shaft, said counterbalance mechanism further including a secondary counterweight non-rotatably mounted on said member of said device.
References Cited (Backward Citations)
FR2284802A1
Cited
JPS5839863A
Cited
US4648359A
Cited
US4722308A
Cited
US4800852A
Cited
US4741303A
Cited
US4856486A
Cited
US4936268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |