Patent US3877534A successfully refreshed from Google Patents.
US3877534A
Expired / Lapsed
US
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Snowmobile track suspension system
Assignee: Outboard Marine Corp
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Filing: 1973-03-26
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Granted: 1975-04-15
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Expires: 1993-03-26
Abstract
Abstract Disclosed herein is a snowmobile comprising a track suspension system including a frame having a forward portion pivotally mounted from a snowmobile chassis about the axis of a sprocket bearing drive shaft, resilient energy absorption means connecting the rearward portion of the frame to the chassis for control of pivotal movement of the frame to the chassis, together with means rotatably supporting an idler bogie on the rearward portion of the frame, and means pivotally mounting a plurality of intermediate bogies from the frame in spaced relation to each other lengthwise of the frame for rotative movement independently of the frame.
Inventors
- 👤 Thomas J Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:25
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/06; B62D55/07; B62D55/08; B62D55/30; B62M; B62M27/00; B62M27/02; B62M2027/026
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
A snowmobile comprising a chassis, a drive shaft rotatably journalled by said chassis transversely thereof, a sprocket fixed on said drive shaft for common rotation therewith, a track suspension frame including a forward portion pivotally mounted from said chassis about the axis of said drive shaft and a rearward portion extending rigidly from said forward portion, resilient energy absorbing means extending between and connecting said rearward frame portion to said chassis to control pivotal movement of said track suspension frame relative to said chassis, an idler bogie supported from said rearward frame portion for rotation about a transverse axis, a plurality of intermediate bogies, means pivotally mounting said intermediate bogies from said track suspension frame in spaced relation to each other lengthwise of said track suspension frame for rotative movement independently of said track suspension frame, and an endless belt trained around said sprocket wheel, said idler bogie, and said intermediate bogies.
Claim 2
Dependent Claim
152 words
A snowmobile comprising a chassis, a drive shaft rotatably journalled by said chassis transversely thereof, a sprocket fixed on said drive shaft for common rotation therewith, a track suspension frame including a forward portion pivotally mounted from said chassis about the axis of said drive shaft and a rearward portion extending rigidly from said forward portion, resilient energy absorbing means extending between and connecting said rearward frame portion to said chassis to control pivotal movement of said track suspension frame relative to said chassis, an idler bogie supported from said rearward frame portion for rotation about a transverse axis, a plurality of intermediate bogies, means pivotally mounting said intermediate bogies from said track suspension frame in spaced relation to each other lengthwise of said track suspension frame for rotative movement independently of said track suspension frame, and an endless belt trained around said sprocket wheel, said idler bogie, and said intermediate bogies.
Claim 3
Dependent Claim
97 words
A snowmobile in accordance with claim 1 wherein said means pivotally mounting said intermediate bogies from said frame includes respective mounting arms pivotally supported by said track suspension frame about respective first axes and respectively pivotally supporting said intermediate bogies about respective second axes and further including means biasing said bogie mounting arms downwardly and forwardly relative to said chassis and wherein the length of a rearward one of said mounting arms between said first and second axes is less than the length of a forward one of said mounting arms between said first and second axes.
Claim 4
Dependent Claim
42 words
A snowmobile in accordance with claim 1 wherein said track suspension frame comprises a pair of transversely spaced frame members which extend fore and aft, and a tube telescoped over said drive shaft and interconnecting the forward portions of said frame members.
Claim 5
Dependent Claim
31 words
A snowmobile in accordance with claim 3 wherein said drive shaft is journalled by said chassis by means affording attachment to and detachment from said chassis of said track suspension frame.
Claim 6
Dependent Claim
21 words
A snowmobile in accordance with claim 1 wherein said resilient energy absorbing means comprises a combined spring and shock absorber assembly.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |