Patent ID: 9334904
Filing Date: 2016-05-10
CPC Classification: F16D,Y10T

Claim Text:
1. A propeller shaft comprising: a first yoke having; (a) a fixing portion fixed to a shaft part; (b) a pair of first yoke portions having a bifurcated shape that extends from one end portion of the fixing portion in an axial direction; and (c) a first bearing hole formed at a top end portion of each first yoke portion and securing therein a first bearing that holds a cruciform shaft; a second yoke coupled to the first yoke through the cruciform shaft and secured to a predetermined member, the second yoke having; (d) a mounting flange; and (e) a bolt insertion hole formed at the mounting flange, a bolt to secure the second yoke to the predetermined member being inserted into the bolt insertion hole; and a securing member securing the mounting flange of the second yoke to the predetermined member through the bolt, and a first concave portion that is shaped to accommodate thereon an outer circumferential surface of a fastening tool, the first concave portion being formed on each first yoke portion, wherein