Patent US3147020A successfully refreshed from Google Patents.
US3147020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steerable toboggan
Assignee: Individual
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Filing: 1962-06-25
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Granted: 1964-09-01
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Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 Henry L Dahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:31
CPC Classifications
B; B62; B62B; B62B13/00; B62B13/02; B62B13/06; B62B13/08; B62B13/12; B62B13/125; B62B15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A STEERABLE TOBOGGAN, A BODY MEMBER IN WHICH THE USER SITS, THE OUTER SURFACE OF SAID BODY MEMBER BEING GENERALLY ARCUATE TRANSVERSELY AND ARCUATE LONGITUDINALLY SUBSTANTIALLY THROUGHOUT ITS ENTIRE LENGTH, A MULTIPLICITY OF STEP FORMATIONS FORMED ON THE ARCUATE SURFACE OF SAID BODY MEMBER ON EACH SIDE OF THE LONGITUDINAL CENTERLINE THEREOF, EACH OF SAID STEP FORMATIONS INCLUDING A SUBSTANTIALLY HORIZONTAL PORTION EXTENDING LONGITUDINALLY THROUGHOUT THE ARCUATE LENGTH OF THE BODY MEMBER AND TERMINATING IN A SUBSTANTIALLY VERTICAL RISER EDGE COTERMINOUS THEREWITH, SAID RISER EDGES BEING PARALLEL AND NORMALLY IN A STRAIGHT LINE ATTITUDE, SAID RISER EDGES CHANGED TO A CURVED LINE RELATIVE TO THE PERPENDICULAR AS SAID BODY MEMBER IS ROTATED ON ITS LONGITUDINAL AXIS TO THEREBY CAUSE SAID TOBOGGAN TO CHANGE ITS FORWARD DIRECTION OF TRAVEL TO ONE SIDE OR THE OTHER.
Claim 2
Dependent Claim
135 words
IN A STEERABLE TOBOGGAN, A BODY MEMBER IN WHICH THE USER SITS, THE OUTER SURFACE OF SAID BODY MEMBER BEING GENERALLY ARCUATE TRANSVERSELY AND ARCUATE LONGITUDINALLY SUBSTANTIALLY THROUGHOUT ITS ENTIRE LENGTH, A MULTIPLICITY OF STEP FORMATIONS FORMED ON THE ARCUATE SURFACE OF SAID BODY MEMBER ON EACH SIDE OF THE LONGITUDINAL CENTERLINE THEREOF, EACH OF SAID STEP FORMATIONS INCLUDING A SUBSTANTIALLY HORIZONTAL PORTION EXTENDING LONGITUDINALLY THROUGHOUT THE ARCUATE LENGTH OF THE BODY MEMBER AND TERMINATING IN A SUBSTANTIALLY VERTICAL RISER EDGE COTERMINOUS THEREWITH, SAID RISER EDGES BEING PARALLEL AND NORMALLY IN A STRAIGHT LINE ATTITUDE, SAID RISER EDGES CHANGED TO A CURVED LINE RELATIVE TO THE PERPENDICULAR AS SAID BODY MEMBER IS ROTATED ON ITS LONGITUDINAL AXIS TO THEREBY CAUSE SAID TOBOGGAN TO CHANGE ITS FORWARD DIRECTION OF TRAVEL TO ONE SIDE OR THE OTHER.
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |