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:
Jan. 08, 2002
Filed:
Jun. 25, 1998
Dai Gil Lee, Taejun, KR;
Durk Hyun Cho, Seoul, KR;
Jin Kyung Choi, Kyungki, KR;
Seong Sik Cheon, Seoul, KR;
Seung Hwan Chang, Taejun, KR;
Je Hoon Oh, Taejun, KR;
Kyung Geun Bang, Kyungki, KR;
Jae Wook Kwon, Seoul, KR;
Po Jin Kim, Busan, KR;
Jin Kook Kim, Taejun, KR;
Abstract
A hybrid shaft adapted to be used as a drive shaft of an automobile transmission system comprises a unitary cylindrical hybrid stem formed from a metal tube and a composite material layer adhered to the metal tube. The metal tube provides torque-transmission strength to the hybrid shaft while the composite material layer increases a specific modulus of the hybrid shaft. The hybrid shaft is produced by stacking a composite material layer on a metal tube, putting a thermal shrinkage tube on the composite material layer, and co-curing the metal tube and the composite material layer while exerting a longitudinal compression force on the metal tube to prevent it from being thermally expanded.