Patent US4540192A successfully refreshed from Google Patents.
US4540192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-wheeled scooter-type vehicle
Assignee: YU KENNETH KWON CHUL
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Filing: 1983-12-27
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Granted: 1985-09-10
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Expires: 2003-12-27
Abstract
Abstract A three-wheeled scooter type of vehicle which is forwardly propelled by the body movement of the occupant by means of two rearwardly extending foot support frames which are pivotally connected to a front steering column. The foot support frames are provided with caster wheels which are yieldably tensioned to propel the vehicle in a direction of forward travel when the foot support frames are laterally moved.
Inventors
- 👤 L. Harvey Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:58
CPC Classifications
B; B62; B62K; B62K3/00; B62K3/002
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
A scooter-type vehicle that can be propelled by the action of the rider, the vehicle comprising: a front steering wheel; a front steering column connected to the steering wheel and adapted to steer the same; and a pair of rearwardly extending foot support frames connected to said front steering column in such a manner that said foot support frames are capable of independent sidewise swinging movement; and a pair of rear supporting wheels, each connected to a foot support frame at the portion thereof remote from said front steering column, said rear supporting wheels being connected to said foot support frames by means of swivel caster mountings so that lateral movements of said foot support frames propel said vehicle in a forward direction.
Claim 2
Dependent Claim
123 words
A scooter-type vehicle that can be propelled by the action of the rider, the vehicle comprising: a front steering wheel; a front steering column connected to the steering wheel and adapted to steer the same; and a pair of rearwardly extending foot support frames connected to said front steering column in such a manner that said foot support frames are capable of independent sidewise swinging movement; and a pair of rear supporting wheels, each connected to a foot support frame at the portion thereof remote from said front steering column, said rear supporting wheels being connected to said foot support frames by means of swivel caster mountings so that lateral movements of said foot support frames propel said vehicle in a forward direction.
Claim 3
Dependent Claim
64 words
A vehicle according to claim 1, and further comprising means for tensioning said swivel caster mountings in such a manner that each of said rear supporting wheels is maintained in line with the direction of movement of said vehicle while being yieldable to permit sidewise swinging of said swivel caster mountings when said foot support frames are moved laterally with respect to one another.
Claim 4
Dependent Claim
121 words
A vehicle according to claim 2, wherein said means for tensioning said swivel caster mounting comprises: a pair of forwardly extending arms which are connected at one end to each of said swivel caster mountings; a pair of support elements which extend from the lower side of each of said rearwardly extending foot support frames; and a pair of springs which are connected at one end to each of said forwardly extending arms and at the other end to each said support elements; each of said springs being connected to said support element by means of a link having a threaded shank which extends through said support element and is fixed thereto by means of a nut on said threaded shank.
Claim 5
Dependent Claim
45 words
A vehicle according to claim 1, wherein each of said rearwardly extending foot support frames comprises a sleeve at the end thereof adapted to mate with said front steering column, and wherein said front steering column resides within said sleeves of said foot support frames.
Claim 6
Dependent Claim
18 words
A vehicle according to claim 4, and further comprising bearing means intermediate said sleeves and said steering column.
Claim 7
Dependent Claim
18 words
A vehicle according to claim 1, and further comprising hand-actuated brake means associating with said front steering wheel.
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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) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |