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专利名称：Device for the operation of an instrument,
for example an axle
发明人：Wilgot Åhs申请号：US09/171257申请日：19981015公开号：US06095300A公开日：20000801
摘要：In a device for driving an instrument (2), for example an axle, step- by-step, thedevice includes a driving part (1), a space (3) between the driving part and the instrument(2), and at least one ball/roller (4) which can have different positions (A, B, C) in the space.In the different positions, the ball/roller is clamped between the driving part and theinstrument or is not clamped, depending on the design of the space and/or the directionof the driving part. A guiding means can be arranged in order to force the ball/roller todifferent positions.
申请人：SEM DRIVE AB
代理机构：Ware, Fressola, Van der Sluys & Adolphson LLP
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