A spring apparatus (10), including: a spring (12); an elongated object (18A) disposed within and along the spring (12); and a mode-changing assembly (16), for providing a first mode in which a portion (38) of the spring (12) being along the elongated object (18A) is not springy, and a second mode in which an entire of the spring (12) is springy.
Spring apparatus
2022-04-12
Patent
Elektronische Ressource
Englisch