Towing mechanism for a ski lift
OwnerSamuel G. Wyssinventor
Life of this patent
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Abstract
A towing mechanism for a ski lift includes a pay-out and take-up device for a tow rope having a towing bar attached to it. That device has a housing in which a luffing drum is non-displaceably mounted for rotation; a nut secured to this drum cooperates with a screw-spindle in the manner of a non-self-locking screw gear. A piston secured to one end of the screw-spindle operates in a cylinder secured to the housing and connected, via a check valve and an adjustable throttle valve arranged in parallel with each other, to a liquid containing chamber which within a reservoir is separated by a dilatable diaphragm from a chamber containing pressurized gas.
Claims3
A towing mechanism for a ski lift having a hauling cable, of the type comprising a tow rope secured to a towing bar, a pay-out and take-up device enabling said tow rope to be pulled out and retracted, a suspension bar for connecting said device to said cable, and return means for counteracting pay-out traction on said tow rope, wherein said pay-out and take-up device comprises:
- a housing,
- a luffing drum non-displaceably mounted for rotation within said housing,
- a nut rigidly secured to said rope-drum,
- a screw-spindle non-rotatingly mounted for longitudinal displacement within said housing, said nut and said screw-spindle together forming a non-self-locking screw gear, and
- a hydraulic-pneumatic device including a piston rigidly secured to said screw-spindle for returning said screw-spindle after longitudinal displacement thereof.
Dependencies are inferred from the claim text.