B - Operations – Transporting – 25 – B
Patent
B - Operations, Transporting
25
B
B25B 23/16 (2006.01) B25B 15/00 (2006.01) B25G 1/00 (2006.01)
Patent
CA 2547367
A selective one-way screwdriver includes a handle including a grip, a driving device for driving a bit-coupling member in a selected one of two opposite directions, a first driving section, a second driving section comprising a skid-proof device and a third driving section comprising a skid-proof device. The diameter of the first driving section is larger than that of the second driving section. The diameter of the second driving section is larger than that of the third driving section. The first, second and third driving sections are good for providing different maximum torques at different top speeds.
Hu Bobby
Smart & Biggar
LandOfFree
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