Patent US4431296A successfully refreshed from Google Patents.
Patent US3664205A successfully refreshed from Google Patents.
US3664205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive means for an endless rope, especially for ski lifts
Assignee: Individual
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Filing: 1970-08-26
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Granted: 1972-05-23
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Expires: 1990-08-26
Abstract
Abstract A drive means for small portable ski lifts comprises a flanged motor-driven drive drum mounted at the upper station of the ski lift and frictionally driving an endless smooth rope adapted to be gripped by the skiers. The incoming reach of the rope passes around the drive drum in a first turn, then around an idle roller and finally in a second turn around the drive drum before leaving the drum. The drive drum is conical and the idle roller separated said turns is positioned radially outside the position on the circumference of the drum at which the incoming reach enters the drum and in approximately the same plane as the part of the conical drum having the smaller diameter.
Inventors
- 👤 Arne Widar Luras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:26
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/60; B66D1/74; B66D1/7405
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
A drive mechanism for an endless rope, especially for skilifts, comprising: a motor-driven flanged conical drive drum for frictionally driving said endless rope which is twice passed over the drum, said drum comprising a truncated conical profile; and an idle separating roller mounted with its axis substantially parallel to said of the drum, and disposed so that the roller is substantially coplanar with a lower diametered cross section of said conical drum towards its tapered end, so as to enable a portion of the rope to be passed around said separating idle roller to guide the rope, thereby preventing two turns of the rope passed around the conical drum from over-riding each other.
Claim 2
Dependent Claim
113 words
A drive mechanism for an endless rope, especially for skilifts, comprising: a motor-driven flanged conical drive drum for frictionally driving said endless rope which is twice passed over the drum, said drum comprising a truncated conical profile; and an idle separating roller mounted with its axis substantially parallel to said of the drum, and disposed so that the roller is substantially coplanar with a lower diametered cross section of said conical drum towards its tapered end, so as to enable a portion of the rope to be passed around said separating idle roller to guide the rope, thereby preventing two turns of the rope passed around the conical drum from over-riding each other.
Claim 3
Dependent Claim
44 words
A drive mechanism according to claim 1, wherein the roller is rotatably mounted in a bracket mounted so as to be pivotal and displaceable in relation to the drum, whereby the plane of the roller can be somewhat adjusted in relation to the drum.
Claim 4
Dependent Claim
24 words
A drive means as claimed in claim 1, wherein the conical drum includes a substantially cylindrical portion forming a continuation of its smaller diameter.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |