Patent US4650027A successfully refreshed from Google Patents.
US4650027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling device between a front suspension and a rear suspension of a vehicle
Assignee: Elf Antar France
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Filing: 1985-06-07
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Granted: 1987-03-17
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Expires: 2005-06-07
Abstract
Abstract Coupling device between the suspension gear of a front wheel and the suspension gear of a rear wheel of a wheeled vehicle such as a motorcycle, in which the suspension deflections are transformed into substantially axial deplacements, comprising on each front and rear side of the vehicle a push-rod or equivalent hinged to the abutment of the suspension spring whereas its other end is hinged to an arm of a resilient rotary coupling member such as a torsion bar, this device being applied to the transfer of front and rear overloads of a vehicle.
Inventors
- 👤 Andre de Cortanze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:57
CPC Classifications
B; B62; B62K; B62K25/00; B62K25/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
240 words
A coupling device between a front suspension system of a front wheel of a motorcycle and a rear suspension system of a rear wheel of said motorcyle, each said suspension system including a movable plate and a suspension spring which is axially displaced by said movable plate upon application of a corresponding force to said front and rear suspension systems, respectively, said coupling device comprising: a front end push-rod having a first end connected with the movable plate of said front suspension system; a rear end push-rod having a first end connected with the movable plate of said rear suspension system; a coupling member including a front arm pivotally connected at a first end to a second end of said front end push-rod, and a rear arm connected at a first end to a second end of said rear end push-rod; and a torsion bar mounted to a frame of said motorcycle in a direction transverse to the lengthwise direction of said motorcycle, and having a first end connected to a second end of said front arm and a second end connected to a second end of said rear arm; each push-rod extending from its respective arm in a direction opposite to the other push-rod; wherein said rear suspension system compensates for over-loading of said front suspension system through said rear end push-rod, said rear arm, said torsion bar, said front arm and said front end push-rod, and vice versa.
Claim 2
Dependent Claim
240 words
A coupling device between a front suspension system of a front wheel of a motorcycle and a rear suspension system of a rear wheel of said motorcyle, each said suspension system including a movable plate and a suspension spring which is axially displaced by said movable plate upon application of a corresponding force to said front and rear suspension systems, respectively, said coupling device comprising: a front end push-rod having a first end connected with the movable plate of said front suspension system; a rear end push-rod having a first end connected with the movable plate of said rear suspension system; a coupling member including a front arm pivotally connected at a first end to a second end of said front end push-rod, and a rear arm connected at a first end to a second end of said rear end push-rod; and a torsion bar mounted to a frame of said motorcycle in a direction transverse to the lengthwise direction of said motorcycle, and having a first end connected to a second end of said front arm and a second end connected to a second end of said rear arm; each push-rod extending from its respective arm in a direction opposite to the other push-rod; wherein said rear suspension system compensates for over-loading of said front suspension system through said rear end push-rod, said rear arm, said torsion bar, said front arm and said front end push-rod, and vice versa.
Claim 3
Dependent Claim
43 words
A coupling device according to claim 1; wherein said torsion bar is rotatably mounted in at least one bearing carried by the motorcycle; and each end of said torsion bar is rotatably mounted with the front and rear arms of said coupling member.
Claim 4
Dependent Claim
40 words
A coupling device according to claim 1; wherein the length of at least one of the push-rods is adjustable under load to permit modification of pre-adjustment of the compression of the helical springs of the front and rear suspension systems.
Claim 5
Dependent Claim
75 words
A coupling device according to claim 1; wherein at least one of the suspension springs is constituted by a helical spring pressed against a respective collar by the respective movable plate, and the respective suspension system includes a compression rod crossing through the helical spring in a substantially axial manner and a hinging head attached to the compression rod after it crosses through the movable plate and to the respective arm of the coupling member.
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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) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |