DRIVERS

摘要

There is disclosed a driver including an elongate shaft and at least one drive assembly. The drive assembly includes a housing which has an orifice for receiving the elongate shaft, and a drive wheel which is located at least partially within the housing. The drive wheel has a bore with a cross-section shaped so that the internal surface of the bore contacts the circumference of elongate shaft when the elongate shaft is inserted into the bore. The bore has at least two fulcrum surfaces so that the drive wheel is pivotable about the elongate shaft. The housing is slideable relative to the elongate shaft.

主权项

1. A driver comprising:
an elongate shaft having a polygon shaped cross-section including at least two parallel sides; at least one drive assembly comprising:
a housing, the housing having an orifice for receiving the elongate shaft;a drive wheel located at least partially within the housing, the drive wheel having a bore with a cross-section shaped so that the internal surface of the bore contacts the circumference of elongate shaft, the bore having at least two fulcrum surfaces so that the drive wheel is pivotable about the elongate shaft; whereinthe housing is slideable relative to the elongate shaft.