Motor vehicles – Surface effect vehicles – Flexible skirt
Patent
1978-09-25
1982-07-13
Pekar, John A.
Motor vehicles
Surface effect vehicles
Flexible skirt
428213, 428247, B60V 116
Patent
active
043390170
ABSTRACT:
A flexible sheet material is disclosed for making air cushion vehicle skirts and the like. A molded seamless air cushion vehicle skirt and method of making same are also disclosed. In the method, an uncured, liquid polyurethane is sprayed onto a mold in the shape of a predetermined air cushion vehicle skirt. This forms a first continuous polyurethane layer on which is laid a foraminous substrate made of triaxially woven an aramid known by the trade mark of KEVLAR. The substrate is then coated with a second continuous layer of liquid, uncured polyurethane. The polyurethane layers penetrate the substrate and mix together so that when the polyurethane is cured, a continuous molded skirt is formed of material which cannot be delaminated. Parts of the mold may be masked to produce uncoated areas of the substrate. These areas may be later sprayed with liquid urethane to produce permeable sections in the air cushion vehicle skirt. The permeable sections reduce drag when the skirt is mounted on an air cushion vehicle and also prevent undesirable vibration or tramping problems in use.
REFERENCES:
patent: 3481424 (1969-12-01), Barr
patent: 3620325 (1971-11-01), Faure et al.
patent: 3760899 (1973-09-01), Crossman
Sprayable Coating, an Advertising Brochure of Tip Top Rubber Products Ltd., Toronto, Canada.
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