Patent US3650528A successfully refreshed from Google Patents.
US3650528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ski-training device
Assignee: Individual
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Filing: 1969-12-04
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Granted: 1972-03-21
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Expires: 1989-12-04
Abstract
Abstract A ski-training device is formed with a base, a pair of ski-like boards pivotally mounted by their front ends on a vertical axis in the front zone of the base and at least one flexible, resilient traction element acting upon the middle zone of the boards over at least two guide rollers rotatably mounted in vertical axes in the rear zone of the base. In use of the device to obtain a realistic feel of movement and forces experienced in technique of skiing, the ski-like boards rotate parallel to one another out of a basic position and are biased for return thereto by spring action.
Inventors
- 👤 Hans Natterer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:43
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
208 words
A ski-training device comprising a base, a pair of ski-like boards pivotally mounted adjacent their front ends about substantially vertical axes in the front zone of said base, at least one roller at the rear end of said boards supporting the said rear end upon the rear zone of said base, at least one elongated, flexible resilient traction element guided over at least two guide rollers that are rotatably mounted about substantially vertical axes in the rear zone of said base, said traction element acting upon said boards between their front and rear ends to bias by spring action return of said boards to a basic position when said boards are rotated out of said basic position, the straight line connecting the centers of said vertical axes in the front zone of said base being approximately parallel to the straight line connecting the centers of said vertical axes of said guide rollers and that portion of said traction element that lies between said guide rollers being laterally outside the points of intersection between straight lines projected from the centers of said vertical axes in the front zone of said base along the longitudinal axes of said boards onto said straight line connecting the axes of said guide rollers.
Claim 2
Dependent Claim
208 words
A ski-training device comprising a base, a pair of ski-like boards pivotally mounted adjacent their front ends about substantially vertical axes in the front zone of said base, at least one roller at the rear end of said boards supporting the said rear end upon the rear zone of said base, at least one elongated, flexible resilient traction element guided over at least two guide rollers that are rotatably mounted about substantially vertical axes in the rear zone of said base, said traction element acting upon said boards between their front and rear ends to bias by spring action return of said boards to a basic position when said boards are rotated out of said basic position, the straight line connecting the centers of said vertical axes in the front zone of said base being approximately parallel to the straight line connecting the centers of said vertical axes of said guide rollers and that portion of said traction element that lies between said guide rollers being laterally outside the points of intersection between straight lines projected from the centers of said vertical axes in the front zone of said base along the longitudinal axes of said boards onto said straight line connecting the axes of said guide rollers.
Claim 3
Dependent Claim
22 words
A ski-training device as claimed in claim 11, wherein the guide rollers for the traction element are adjustably arranged on said base.
Claim 4
Dependent Claim
27 words
A ski-training device as claimed in claim 11, wherein the point of application of the traction element on the ski-like boards is adjustable in their longitudinal direction.
Claim 5
Dependent Claim
36 words
A ski-training device as claimed in claim 11, wherein the ski-like boards are provided with longitudinal slots in their middle zone in which means for tightening the ends of the traction element are displaceable and fixable.
Claim 6
Dependent Claim
42 words
A ski-training device as claimed in claim 11, wherein a detachable transverse clip and means for hinge connection of said transverse clip with the ski-like boards are provided in their middle zone between the front and rear ends of the ski-like boards.
Claim 7
Dependent Claim
36 words
A ski-training device as claimed in claim 5, wherein means for tightening the ends of said traction element are provided, said means and the means for hinge connection of said transverse clip forming an integral part.
Claim 8
Dependent Claim
43 words
A ski-training device as claimed in claim 11, wherein one single traction element guided over guide rollers in the rear zone of the base is provided, whose one end is tightened on one ski-like board, the other end on the other ski-like board.
Claim 9
Dependent Claim
49 words
A ski-training device as claimed in claim 11, wherein two traction elements guided over guide rollers in the rear zone of the base are provided, both ends of one traction element being tightened on one ski-like board, both ends of the other traction element on the other ski-like board.
Claim 10
Dependent Claim
32 words
A ski-training device as claimed in claim 8, wherein both the guide rollers of the one traction element and the guide rollers of the other traction element are superposed on one axis.
Claim 11
Dependent Claim
26 words
A ski-training device as claimed in claim 11, wherein spring supports are provided laterally on the bottom side of the base in the rear zone outside.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |