Ski

US4431209A · kind A · utility

Assignee

• Franz Volkl OHG · DE

Inventors

• Franz Völkl · Friedenfels, DE
• Heinz Muller · Waiblingen, DE

Key dates

• Filing date: Feb 2, 1981
• Grant date: Feb 14, 1984
• Expiry date: Feb 2, 2001

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A63C7/06
• WIPO field: Furniture, games
• WIPO sector: Other fields

Abstract

A ski has an elongated body part, a polyethylene bottom layer arranged on the body part, and a roughening provided on a sliding surface of the bottom layer over a supporting length of the ski and including a plurality of projections each formed as an elongated tooth from polyethylene of the bottom layer and inclined in its entirety toward the rear end of the body part, wherein the teeth are arranged with a density of between 1000 and 4000 teeth per cm.sup.2. The inventive ski is manufactured by dry grinding of the sliding surface of the polyethylene bottom layer with a relatively high efficiency.