Nixon & Vanderhye P.C.
Fastening method and cylinder device
A fastening method for fastening a nut to a bolt by screwing includes preparing a nut including a tool mounting portion formed on a seat surface, and an annular thin portion formed on the tool mounting portion opposite to the seat surface, swaging a plurality of places of the thin portion with punches from an outer circumferential direction, and flowing a thickness of the thin portion so as to extend to a front end of the bolt partially in a circumferential direction to be closely adhered to a screw portion of the bolt.
HITACHI AUTOMOTIVE SYSTEMS, LTD.
F B B B B Y F
F16B B21D B21K B21J B23P Y10T F16F
inventional inventional inventional inventional additional additional inventional
Makoto Takayuki
Nishimura Ohno