To reduce abrasion of coil springs; and to easily set a torsional characteristic in a multistage state, in a spring assembly.
This spring assembly 5 has the first coil spring 51, the second coil spring 52, a pair of spring seats 54 and the third coil spring 53. The second coil spring 52 is arranged in an inner peripheral part of the first coil spring 51, and the free length is set shorter than the first coil spring 51. The pair of spring seats 54 are oppositely arranged on both ends of the first coil spring 51. The third coil spring 53 is arranged between one end of the second coil spring 52 and the spring seats 54 in the inner peripheral part of the first coil spring 51. This third coil spring 53 engages the one end of the second coil spring 52 with the spring seats 54.
YONEDA KAZUHIKO
IWASE MASAHIKO
HASHIMOTO HIDEKI
INABA SAIGO
Hidetada Kato
Nao Watanabe
Next Patent: FRICTION CLUTCH