US4541643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two wheel skating device
Assignee: Individual
•
Filing: 1983-06-27
•
Granted: 1985-09-17
•
Expires: 2003-06-27
Abstract
Abstract The two wheel skating device of the present invention contains two large size wheels with each over four inches in diameter. The wheels are symmetrically arranged on opposite sides of a frame which accommodates a skater's shoe. The wheels are rotationally mounted on axles coaxially extending from opposite sides of a swinging arm which is pivotally connected to the frame. Each wheel is rotationally mounted through a wheel assembly including unidirectional needle bearings for rotation in only one direction.
Inventors
- 👤 Ivan Pavincic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:54
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/04; A63C17/06; A63C17/08; A63C17/004; A63C17/0046; A63C17/14; A63C17/1436; A63C17/1454; A63C17/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
A two wheel skating device comprising: a frame adapted to accommodate the foot of a skater; a first and second wheel; wheel assembly means for rotationally mounting said first and second wheel on opposite sides of said frame, said wheel assembly means including a wheel axle for each wheel, ball bearings mounted on each axle and unidirectional needle bearings for each wheel to permit rotation of said first and second wheel in only one direction; and suspension means for pivotally coupling each wheel axle to said frame with each suspension means having a suspension pivot axis which is offset from each wheel axle such that each wheel axle is displaced relative to the suspension axis to cause the skate to turn based upon the distribution of the weight of the foot on the frame, said suspension means including a swinging arm for each wheel, with each swinging arm being connected at one end about said wheel axle and pivotally connected at the other end about said suspension axis to said frame.
Claim 2
Dependent Claim
171 words
A two wheel skating device comprising: a frame adapted to accommodate the foot of a skater; a first and second wheel; wheel assembly means for rotationally mounting said first and second wheel on opposite sides of said frame, said wheel assembly means including a wheel axle for each wheel, ball bearings mounted on each axle and unidirectional needle bearings for each wheel to permit rotation of said first and second wheel in only one direction; and suspension means for pivotally coupling each wheel axle to said frame with each suspension means having a suspension pivot axis which is offset from each wheel axle such that each wheel axle is displaced relative to the suspension axis to cause the skate to turn based upon the distribution of the weight of the foot on the frame, said suspension means including a swinging arm for each wheel, with each swinging arm being connected at one end about said wheel axle and pivotally connected at the other end about said suspension axis to said frame.
Claim 3
Dependent Claim
27 words
A two wheel skating device as claimed in claim 1 wherein said first and second wheel each have a diameter of over at least about 4 inches.
Claim 4
Dependent Claim
21 words
A two wheel skating device as claimed in claim 2 wherein said unidirectional needle bearings are disposed adjacent said ball bearings.
Claim 5
Dependent Claim
39 words
A two wheel skating device as claimed in claim 3 further comprising shock absorber means connected to said frame and to said swinging arm for dampening the relative vertical motion between said first and second wheel and said frame.
Claim 6
Dependent Claim
22 words
A two wheel skating device as claimed in claim 4 wherein said swinging arm is connected to said frame through a pin.
Claim 7
Dependent Claim
23 words
A two wheel skating device as claimed in claim 5 wherein each wheel has a rim and a tire mounted over said rim.
Claim 8
Dependent Claim
44 words
A two wheel skating device as claimed in claim 6 further comprising manually operated brake means connected to said swinging arm about said pin with said brake means having a brake shoe for engaging the rim of said wheel upon actuation of said brake.
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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) | 1988-09-16 | 1989-03-18 | 1989-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-16 | 1993-03-18 | 1993-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-16 | 1997-03-18 | 1997-09-17 | $7700.00 | Window Closed / Lapsed |