US4993733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three wheeled recumbent cycle
Assignee: Individual
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Filing: 1989-02-21
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Granted: 1991-02-19
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Expires: 2009-02-21
Abstract
Abstract A three wheel recumbent vehicle having the steering pivot point of the front axle tilted forwardly about 8° from perpendicular, causing the vehicle from the pivot point back to lean into a turn, and also having the front axle bar constructed with a low center section and end members which radiate upwardly and backwardly to provide room for the user's feet and to add stability on turns by increasing the distance between the center line of the vehicle and the point where the outboard tire touches the road.
Inventors
- 👤 Keith Eilers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:45
CPC Classifications
B; B62; B62K; B62K5/00; B62K5/02; B62K5/05; B62K3/00; B62K3/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
146 words
A recumbent vehicle comprising a. a main longitudinal frame, b. a seat assembly positioned on the frame, c. a rear drive wheel mounted on the rear end of said frame, d. a front steering mechanism mounted on the front end of said frame comprising, 1. a front axle having a lower center axle member to provide room for the rider's feet to pedal the vehicle and rearwardly and upwardly inclined end members. 2. a steering post, being forwardly inclined and having a connection to the frame said center axle member being pivotally mounted to said steering post below the connection of said steering post to the frame, whereby the entire axle pivots about the steering post when the vehicle is turned, 3. a pair of front wheels journaled on the ends of said axle end members, 4. a pivotable steering bar mounted on the frame, and
Claim 2
Dependent Claim
146 words
A recumbent vehicle comprising a. a main longitudinal frame, b. a seat assembly positioned on the frame, c. a rear drive wheel mounted on the rear end of said frame, d. a front steering mechanism mounted on the front end of said frame comprising, 1. a front axle having a lower center axle member to provide room for the rider's feet to pedal the vehicle and rearwardly and upwardly inclined end members. 2. a steering post, being forwardly inclined and having a connection to the frame said center axle member being pivotally mounted to said steering post below the connection of said steering post to the frame, whereby the entire axle pivots about the steering post when the vehicle is turned, 3. a pair of front wheels journaled on the ends of said axle end members, 4. a pivotable steering bar mounted on the frame, and
Claim 3
Dependent Claim
128 words
a steering push rod directly connecting the center axle member and the steering bar and supported by the main frame to pivot the axle member when the steering bar is turned, 6. said front steering mechanism providing the vehicle anti-rollover stability when the steering bar is turned thereby pivoting the entire axle about the steering post thus increasing the distance between where the outer wheel touches the ground and the center line of the vehicle and decreasing the distance between the vehicle center line and where the inner wheel touches the ground during a turn, and e. drive means mounted on the main frame including a pedal means engagible by the feet of the driver and drive chains connected between the pedal means and the rear drive wheel.
Claim 4
Dependent Claim
128 words
a steering push rod directly connecting the center axle member and the steering bar and supported by the main frame to pivot the axle member when the steering bar is turned, 6. said front steering mechanism providing the vehicle anti-rollover stability when the steering bar is turned thereby pivoting the entire axle about the steering post thus increasing the distance between where the outer wheel touches the ground and the center line of the vehicle and decreasing the distance between the vehicle center line and where the inner wheel touches the ground during a turn, and e. drive means mounted on the main frame including a pedal means engagible by the feet of the driver and drive chains connected between the pedal means and the rear drive wheel.
Claim 5
Dependent Claim
20 words
The vehicle of claim 1 wherein the steering post is inclined from about 96° to about 98° to the horizontal.
Claim 6
Dependent Claim
17 words
The vehicle of claim 1, wherein the seat is longitudinally adjustable along the length of the frame.
Claim 7
Dependent Claim
29 words
The vehicle of claim 1 wherein the connecting rod is adjustable in length and the steering bar and the seat are longitudinally adjustable along the length of the frame.
Claim 8
Dependent Claim
21 words
The vehicle of claim 1, wherein the steering bar has actuators for a gear shift and brake system for the vehicle.
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) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |