Shinichi YAMAKAWA,Tsuyoshi Ashida,Takayuki Nakamura,Yasunori Ohta,Rick Cornelius
申请号：
US13283693
公开号：
US20120238804A1
申请日:
2011.10.28
申请国别(地区):
US
年份:
2012
代理人:
摘要：
A propelling device includes a rotary body, an external cylinder for supporting a rotary body in a circulating manner, a first drive mechanism, and a second drive mechanism. The first drive mechanism has a torque wire and a pinion gear that are provided in a distal portion of the insertion part. The second drive mechanism has an internal cylinder mounted on the distal portion of the insertion part, a transmission gear rotatably supported outside the internal cylinder, and a housing cylinder provided outside the transmission gear. The transmission gear has a worm gear on the outer peripheral surface thereof, and a gear tooth portion that meshes with a pinion gear on an inner peripheral surface thereof. The housing cylinder has drive gears that mesh with the worm gear. Although the second mechanism is replaced at each inspection, the first mechanism provided at the insertion part is repeatedly used.
