US3776354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snowmobile engine and torque converter mount
Assignee: Certified Parts Corp
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Filing: 1972-03-02
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Granted: 1973-12-04
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Expires: 1992-03-02
Abstract
Abstract A mounting structure for the engine and torque converter of a snowmobile, which makes the engine and torque converter a separate unit. The engine-torque converter unit is then mounted to the frame of the machine through vibration isolation bushings. The unit mounting eliminates misalignment of the torque converter drive belt. The mounting also reduces fatigue failure of snowmobile chassis because both the drive and driven pulleys are connected to the engine, and the chassis does not have to carry the high belt load as is required when the pulley forming the torque converter is separately mounted from the engine.
Inventors
- 👤 M Duclo
- 👤 M Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:49
CPC Classifications
B; B62; B62M; B62M27/00; B62M27/02; B62M2027/023
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
142 words
A system for mounting an engine and driven output shaft to a vehicle chassis comprising a rigid engine assembly having a crankshaft, mounting lug means for supporting said engine relative to the chassis, said mounting lug means being positioned in spaced apart locations, a bearing support means, means to mount said bearing support means on said engine for movement therewith, said output shaft having a first end portion rotatably mounted in said bearing support means, drive means mounted onto said engine and output shaft to drive the output shaft from the crankshaft of said engine, vibration isolation means mounting said mounting lug means with respect to said chassis, said output shaft having a second end portion spaced from said bearing support means, and means mounted with respect to said chassis to support said second end portion independently of the vibration isolation means.
Claim 2
Independent Claim
142 words
A system for mounting an engine and driven output shaft to a vehicle chassis comprising a rigid engine assembly having a crankshaft, mounting lug means for supporting said engine relative to the chassis, said mounting lug means being positioned in spaced apart locations, a bearing support means, means to mount said bearing support means on said engine for movement therewith, said output shaft having a first end portion rotatably mounted in said bearing support means, drive means mounted onto said engine and output shaft to drive the output shaft from the crankshaft of said engine, vibration isolation means mounting said mounting lug means with respect to said chassis, said output shaft having a second end portion spaced from said bearing support means, and means mounted with respect to said chassis to support said second end portion independently of the vibration isolation means.
Claim 3
Dependent Claim
28 words
The combination as specified in claim 1 wherein said bearing support means comprises means to absorb a small amount of compression when the output shaft is under load.
Claim 4
Independent Claim
140 words
A system for mounting an engine and belt driven output shaft to a snowmobile chassis comprisiNg a rigid engine assembly having a crankshaft, a crankcase portion and a head portion, said head portion being inclined rearwardly and upwardly from the crankcase portion, mounting lug means for supporting said engine relative to the chassis including separate mounting lug means on said head portion and said crankcase portion, at least one of said mounting lug means being connected to said head portion and including a bearing support means, said output shaft being rotatably mounted in said bearing support means, drive pulley means mounted onto the crankshaft of said engine, driven pulley means mounted on said output shaft, a drive belt drivably connecting said drive and driven pulley means, and vibration isolation means mounting said mounting lug means with respect to said chassis.
Claim 5
Independent Claim
140 words
A system for mounting an engine and belt driven output shaft to a snowmobile chassis comprisiNg a rigid engine assembly having a crankshaft, a crankcase portion and a head portion, said head portion being inclined rearwardly and upwardly from the crankcase portion, mounting lug means for supporting said engine relative to the chassis including separate mounting lug means on said head portion and said crankcase portion, at least one of said mounting lug means being connected to said head portion and including a bearing support means, said output shaft being rotatably mounted in said bearing support means, drive pulley means mounted onto the crankshaft of said engine, driven pulley means mounted on said output shaft, a drive belt drivably connecting said drive and driven pulley means, and vibration isolation means mounting said mounting lug means with respect to said chassis.
Claim 6
Dependent Claim
36 words
The combination as specified in claim 3 wherein said drive pulley means comprises a centrifugal clutch and variable size pulley, and said driven pulley means comprises a spring loaded variable size pulley forming a torque converter.
Claim 7
Dependent Claim
68 words
The combination as specified in claim 3 wherein said output shaft extends transversely to the snowmobile substantially parallel to the axis of rotation of the engine crankshaft and has a second end, output drive means attached to said chassis independently of said engine for providing power to propell said snowmobile, said output shaft being mounted on said output drive means independently of said engine adjacent said second end.
Claim 8
Dependent Claim
22 words
The combination as specified in claim 5 wherein said output drive means comprises a chain case assembly rigidly mounted to said chassis.
Claim 9
Dependent Claim
46 words
The combination as specified in claim 3 wherein said engine has carburetor means thereon, said carburetor means being on a side of said engine facing generally upwardly, and exhaust means for said engine positioned on an opposite side of said engine extending generally below the engine.
Claim 10
Dependent Claim
146 words
In a snowmobile having a chassis, an engine having a rotatable crankshaft for powering said snowmobile, a drive pulley drivably mounted on the crankshaft of said engine, and a torque responsive variable diameter driven pulley, a jack-shaft having a first end and an opposite end, means mounting said driven pulley to said jackshaft, a belt drivably connecting said drive and driven pulleys, a mounting lug having a bearing thereon rotatably mounting said jackshaft, said mounting lug being rigidly attached to said engine at a position spaced from the axis of rotation of said crankshaft, an opposite end of said jackshaft extending a substantial distance from said mounting lug, said opposite end of said jack-shaft being rotatably mounted in a separate support rigidly attached to the snowmobile chassis, and vibration isolation means mounting said engine to the snowmobile chassis independently of the opposite end of said jackshaft.
Claim 11
Dependent Claim
146 words
In a snowmobile having a chassis, an engine having a rotatable crankshaft for powering said snowmobile, a drive pulley drivably mounted on the crankshaft of said engine, and a torque responsive variable diameter driven pulley, a jack-shaft having a first end and an opposite end, means mounting said driven pulley to said jackshaft, a belt drivably connecting said drive and driven pulleys, a mounting lug having a bearing thereon rotatably mounting said jackshaft, said mounting lug being rigidly attached to said engine at a position spaced from the axis of rotation of said crankshaft, an opposite end of said jackshaft extending a substantial distance from said mounting lug, said opposite end of said jack-shaft being rotatably mounted in a separate support rigidly attached to the snowmobile chassis, and vibration isolation means mounting said engine to the snowmobile chassis independently of the opposite end of said jackshaft.
Claim 12
Dependent Claim
43 words
The combination as specified in claim 8 wherein said mounting lug rigidly attached to said engine includes a support portion for attaching said lug to said chassis, and said vibration isolation means comprises rubber bushing means connecting said support portion to said chassis.
References Cited (Backward Citations)
US764737A
Cited
US2105153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |