Nhk Spring Co., Ltd.

Masakazu Nishiyama

Takeyoshi Shinbori

Chiharu Umetsu

Akira Kebukawa

Mituru Andoh

Hideo Yamamoto

A vehicle suspension device which suspends a vehicle body and a wheel, comprising a coil spring body having a predetermined number of coaxial turns, and a first cylinder and a second cylinder, each including a soft synthetic resin open-cell foam which is treated to be surging-proof and waterproof and which has a wall in which is embedded at least one turn located at each end of said coil spring body.

Vehicle suspension device with a coil spring embedded in an open cell

A coated coil spring wrapped in a coating member prepared from a soft synthetic resin foam, wherein the coating members of the respective coil spring turns constituting at least the effective region of the coil spring are provided with a helical clearance; and the width of said clearance accounts for 0.15 to 0.50 times the width of the adjacent coil spring turns.

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Yokohama, Japan

Masakazu Nishiyama