Conical lightweight mast - of spiral jointed thin metal tube and plastic filler

A tapering mast, esp. for telephone or lighting poles, comprises a spirally jointed tube, pref. of 0.5-1.5 mm. thick steel plate, filled partly or wholly with plastic bonded to its inner surface. Prefd. plastics are foamed polystyrene or polyurethane.

Bibliographische Detailangaben

Hauptverfasser:	KALERVO MALKKI,EINO, SILDE,VALENTIN
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	BUILDING BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES FENCING FIXED CONSTRUCTIONS MASTS SWIMMING OR SPLASH BATHS OR POOLS TENTS OR CANOPIES, IN GENERAL
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