Drive shaft made of fiber reinforced plastics, and method for connecting pipe made of fire-reinforced plastics
AssigneeSumitomo Chemical Company, Limited
InventorsAkiko Nakazono, Yoshifumi Nakano, Kohji Yamatsuta, Yasuo Shinohara, Hitoshi Murotani
Life of this patent
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Abstract
A drive shaft made of fiber-reinforced plastics comprising a pipe made of fiber-reinforced plastics to which a fitting is connected, in which a connecting portion of the pipe and a connecting portion of the fitting engage each other through bite of serrations formed on the inner or outer surface of the connecting portion of the fitting into the connecting portion of the pipe, with the space between the pipe and the fitting at the biting sites being filled with an adhesive.
Claims11
A drive shaft made of fiber-reinforced plastics comprising
- a pipe made of fiber-reinforced plastics having a connecting portion and a protective layer,
- said protective layer has a thickness and a circumferential modulus of elasticity of not more than 30 Gpa, is provided on the connecting portion,
- a fitting having a connecting portion with serrations having a height formed on one of the inner and outer surfaces of the connecting portion, the fitting has a circumferential modulus of elasticity,
- the serrations fittingly engage the protective layer of the pipe so that there are spaces between the serrations and the protective layer,
- an adhesive fills the space between the serrations and the protective layer.
A method for connecting a pipe made of fiber-reinforced plastics with a fitting, said method comprising the steps of:
- applying an adhesive to at least one of a connecting portion of said pipe and a connecting portion of said fitting;
- and
- press-fitting said fitting into said pipe or press-fitting said pipe into said fitting,
- said fitting having serrations on the outer or inner surface thereof at said connecting portion thereof;
- wherein said pipe has a protective layer provided on the side of said pipe into which said serrations fit, wherein said serrations have a height, and wherein said protective layer has a thickness and a circumferential modulus of elasticity of not more than 30 Gpa at the connecting portion thereof, and wherein said fitting has a circumferential modulus of elasticity.
Dependencies are inferred from the claim text.