US4226296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame of motorcycles
Assignee: Yamaha Motor Co Ltd
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Filing: 1978-09-25
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Granted: 1980-10-07
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Expires: 1998-09-25
Abstract
Abstract A motorcycle frame has a steering head to which a pair of upper and a pair of lower tubes are welded. The tubes extend rearwardly, the members of each pair being spaced apart from one another. They are interconnected at the rear. The lower tubes are spaced apart to receive and suspend a motorcycle engine, the engine being insertable into and removable from, said frame through the bottom of the frame. Conveniently, seat rails can be attached to the frame.
Inventors
- 👤 Kazuo Higaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:08
CPC Classifications
B; B62; B62K; B62K11/00; B62K11/02; B62K11/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A motorcycle frame for dependently supporting an engine, comprising: a forward steering head; a pair of laterally spaced-apart upper tubes; a pair of laterally spaced-apart lower tubes, the forward end of each of the tubes being welded to the steering head, the rearward ends of the upper tubes, the lower tubes being welded to the upper tubes at locations spaced forwardly from the rearward ends of the rear portions of the upper tubes being downwardly bent, the intermediate portions of the lower tubes being laterally spaced-apart sufficiently to receive and embrace said engine; at least one upper connector tube laterally interconnecting said upper tubes; at least one lower connector tube laterally interconnecting said lower tubes, the frame being devoid of structure which can interfere with the entry of said engine between said intermediate portions; and bracket means on said frame for dependently suspending said engine between said intermediate portions.
Claim 2
Dependent Claim
149 words
A motorcycle frame for dependently supporting an engine, comprising: a forward steering head; a pair of laterally spaced-apart upper tubes; a pair of laterally spaced-apart lower tubes, the forward end of each of the tubes being welded to the steering head, the rearward ends of the upper tubes, the lower tubes being welded to the upper tubes at locations spaced forwardly from the rearward ends of the rear portions of the upper tubes being downwardly bent, the intermediate portions of the lower tubes being laterally spaced-apart sufficiently to receive and embrace said engine; at least one upper connector tube laterally interconnecting said upper tubes; at least one lower connector tube laterally interconnecting said lower tubes, the frame being devoid of structure which can interfere with the entry of said engine between said intermediate portions; and bracket means on said frame for dependently suspending said engine between said intermediate portions.
Claim 3
Dependent Claim
23 words
A motorcycle frame according to claim 1 in which a plurality of said bracket means is attached to each of said lower tubes.
Claim 4
Dependent Claim
27 words
A motorcycle frame according to claim 2 in which a bracket means is attached to each of said upper tubes, adjacent to the respective rear end thereof.
Claim 5
Dependent Claim
34 words
A motorcycle frame according to claim 1 in which a plurality of seat rails for supporting a seat are attached to and extend between said upper tubes forwardly of the said rear portions thereof.
Claim 6
Dependent Claim
52 words
In combination: a motorcycle frame according to claim 1; and an internal combustion engine suspended from said frame and projecting downwardly between said lower tubes, said lower tubes providing lateral clearance for all parts of the engine which have an elevation above the lower tubes when said engine is suspended as stated.
Claim 7
Dependent Claim
29 words
A combination according to claim 5 in which a plurality of bracket means is attached to each of said lower tubes for attachment of said engine to the frame.
Claim 8
Dependent Claim
32 words
A combination according to claim 6 in which a bracket means is attached to each of said upper tubes, adjacent to the respective rear end thereof, for additional attachment of said engine.
Claim 9
Dependent Claim
61 words
A combination according to claim 5 in which said lower tubes are connected to each other at their rearward ends, and are spaced-apart from each other adjacent thereto to provide an opening, and in which the engine has a plurality of exhaust pipes and a muffler, said exhaust pipes being connected to said muffler, and said mufflers passing through said opening.
Claim 10
Dependent Claim
64 words
A combination according to claim 5 in which said engine has an even number of cylinders, disposed in banks forming the shape of a letter V, said frame including bracket means attached to each of said lower tubes by means of which said engine is attached to and suspended from said lower tubes at an engine portion near the intersecting portions of said banks.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |