US4660854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame construction for motorcycles
Assignee: Yamaha Motor Co Ltd
•
Filing: 1985-12-18
•
Granted: 1987-04-28
•
Expires: 2005-12-18
Abstract
Abstract An improved frame construction for a vehicle such as a motorcycle in which the main tube and down tubes are connected to the head pipe at its lower end so as to afford an increased gas tank capacity. A reinforcement brace in the form of upper and lower braces absorb bending and twisting forces at the connection between the main and down tubes and the head pipe. The connection of the down tube to the reinforcement brace is disconnectable so as to permit removal for servicing of the engine.
Inventors
- 👤 Toshiyuki Suzuki
- 👤 Yuro Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:40
CPC Classifications
B; B62; B62K; B62K11/00; B62K11/02; B62K11/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
135 words
In a frame construction for a vehicle having at least one front wheel dirigibly supported by said frame and at least one rear wheel carried by said frame, a head pipe providing a steering journal for said dirigible wheel, a pair of main tubes connected at their forward ends to said head pipe at the lower end thereof and extending rearwardly therefrom, and reinforcing means connected between said head pipe and said main tube for resisting twisting forces on the joint between said main tube and said head pipe, said reinforcing means comprising an upper brace comprising a first piece extending between said main tubes rearwardly of their connection to said head pipe and a second piece affixed to said first piece at its rearward end and to said head pipe at its forward end.
Claim 2
Dependent Claim
135 words
In a frame construction for a vehicle having at least one front wheel dirigibly supported by said frame and at least one rear wheel carried by said frame, a head pipe providing a steering journal for said dirigible wheel, a pair of main tubes connected at their forward ends to said head pipe at the lower end thereof and extending rearwardly therefrom, and reinforcing means connected between said head pipe and said main tube for resisting twisting forces on the joint between said main tube and said head pipe, said reinforcing means comprising an upper brace comprising a first piece extending between said main tubes rearwardly of their connection to said head pipe and a second piece affixed to said first piece at its rearward end and to said head pipe at its forward end.
Claim 3
Dependent Claim
31 words
In a frame construction as set forth in claim 1 wherein the reinforcing means further comprises a lower brace connected between the lower ends of the main tubes and head pipe.
Claim 4
Dependent Claim
27 words
In a frame construction as set forth in claim 2 further including a saddle type fuel tank carried by the frame and juxtaposed to the upper brace.
Claim 5
Dependent Claim
26 words
In a frame construction as set forth in claim 1 further including a saddle type fuel tank carried by the frame and juxtaposed to the brace.
Claim 6
Dependent Claim
17 words
In a frame construction as set forth in claim 1 wherein the main tubes comprise square members.
Claim 7
Dependent Claim
31 words
In a frame construction as set forth in claim 5 wherein the reinforcing means further comprises a lower brace connected between the lower ends of the main tubes and head pipe.
Claim 8
Dependent Claim
36 words
In a frame construction as set forth in claim 1 wherein the reinforcing means further comprises a brace affixed to the lower side of the main tubes and to the lower periphery of the head tube.
Claim 9
Dependent Claim
31 words
In a frame construction as set forth in claim 7 further including a pair of down tubes each fixed to a respective one of the main tubes through the reinforcing means.
Claim 10
Dependent Claim
25 words
In a frame construction as set forth in claim 8 wherein the connection between the down tube and the reinforcing means is a disconnectable connection.
Claim 11
Dependent Claim
22 words
In a frame construction as set forth in claim 9 wherein the main tube and down tubes are formed as square tubes.
Claim 12
Dependent Claim
49 words
In a frame construction as set forth in claim 1 wherein the frame further comprises a pair of down tubes fixed at their forward ends to respective ones of the main tubes adjacent their juncture with the head pipe and at their rear end to the respective main tube.
Claim 13
Dependent Claim
35 words
In a frame construction as set forth in claim 11 wherein an engine is mounted in the frame and a trailing arm supports the rear wheel by means of a pivot provided by the frame.
Claim 14
Dependent Claim
26 words
In a frame construction as set forth in claim 12 further including a saddle type fuel tank carried by the frame and juxtaposed to the brace.
Claim 15
Dependent Claim
47 words
In a frame construction as set forth in claim 13 wherein the reinforcing means further comprises a lower brace fixed between the upper end of the respective down tube and the lower side of the respective main tube and to the lower end of the head pipe.
Claim 16
Dependent Claim
26 words
In a frame construction as set forth in claim 14 wherein the down tube is detachably connected to the frame by means of the reinforcing means.
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) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |