US3844223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for a skilift
Assignee: Poma SA
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Filing: 1972-11-21
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Granted: 1974-10-29
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Expires: 1992-11-21
Abstract
Abstract The safety device permits the detection of a crossing of the end of a skilift track, and it includes a rope stretched between two fixed points, the inflexion of this rope constituting the signal that the limit has been passed. The inflexion of the rope is detected by the pivoting of winding drums on which are wound the ends of the rope.
Inventors
- 👤 R Brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:46
CPC Classifications
B; B61; B61B; B61B12/00; B61B12/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
138 words
A skilift, said skilift comprising: a. a tow track including a tow track end; b. a safety device for protecting skiers, said safety device extending transversely of said tow track proximate said tow track end to detect crossing of said end by a skier, said safety device comprising: i. a pair of anchoring points, one of said points disposed on each side of said track; ii. a rope attached to and normally elastically stretched between said points across said tow track, whereby engagement of said rope by a skier passing over said tow track end will angularly displace said rope from its normal position into a V-shape; iii. means for detecting said angular displacement of said rope relative to said anchoring points thereby to effect a stopping of the skilift as long as said rope retains said V-shape.
Claim 2
Dependent Claim
138 words
A skilift, said skilift comprising: a. a tow track including a tow track end; b. a safety device for protecting skiers, said safety device extending transversely of said tow track proximate said tow track end to detect crossing of said end by a skier, said safety device comprising: i. a pair of anchoring points, one of said points disposed on each side of said track; ii. a rope attached to and normally elastically stretched between said points across said tow track, whereby engagement of said rope by a skier passing over said tow track end will angularly displace said rope from its normal position into a V-shape; iii. means for detecting said angular displacement of said rope relative to said anchoring points thereby to effect a stopping of the skilift as long as said rope retains said V-shape.
Claim 3
Dependent Claim
34 words
The skilift according to claim 1 wherein said safety device further comprises a pair of winding means for said rope, each of said winding means secured to a respective one of said anchoring points.
Claim 4
Dependent Claim
45 words
The skilift according to claim 2 wherein said safety device further comprises fixing means for pivotally securing each said winding means to its respective anchor point, for pivoting about a vertical axis, the safety device further comprising means for detecting pivoting of said winding means.
References Cited (Backward Citations)
US3209703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |