Vincent GROENHUIS,Francoise Jeanette SIEPEL,Stefano STRAMIGIOLI
申请号：
US16326442
公开号：
US20200182267A1
申请日:
2017.08.23
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A pneumatic stepper motor includes a housing, said housing accommodating at least part of: a rack or geared axle comprising a plurality of gear elements； and two pistons, each comprising at least two teeth, said pistons being arranged to cooperate with said rack or geared axle. The racks may either be straight or curved. The pistons are preferably double-acting pistons. A device includes at least one, and preferably a plurality of, such pneumatic stepper motor(s). The device may in particular be an MRI-compatible robotic system, more in particular for example an MRI-guided breast biopsy device.
