The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 1984
Filed:
Apr. 06, 1982
Applicant:
Inventor:
Tullio Campagnolo, 36100 Vicenza, IT;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B62K / ;
U.S. Cl.
CPC ...
2802 / ; 138141 ; 138174 ; 138D / ;
Abstract
A light and strong tube structure for frames of bicycles and motorcycles has its cross sections with a variable thickness of the tube wall. Said wall is formed by two or more layers of different materials, of which at least one is metallic material and at least another one has a preferential direction of tensile strength. Preferably, the straight cross sections of the tube are outwardly defined by a circle and inwardly defined by an ellipse and the said layers comprise an external metallic layer and an internal layer of fibers incorporated into resin.