B - Operations – Transporting – 25 – B
Patent
B - Operations, Transporting
25
B
B25B 13/46 (2006.01)
Patent
CA 2161384
A torsion wrench includes a tubular casing, a drive unit pivoted to one end of the casing to engage a workpiece, and an alarm assembly connected to the drive unit for generating an alarm sound when torsion force applied on the workpiece reaches a predetermined limit. The alarm assembly includes a bolt mounted threadably in another end of the casing and rotatable relative to the casing so as to be movable along an axis of the latter to adjust the predetermined limit, and a lock unit for locking the bolt. The lock unit includes a first sleeve sleeved slidably and non-rotatably on the casing and having a retaining end, a second sleeve sleeved slidably and rotatably on the casing and having an engaging end to engage releasably the retaining end, and a tubular handle sleeved on the first and second sleeves and having one end connected to the bolt and another end connected to the second sleeve. The second sleeve is movable along the axis of the casing between a first position, where the engaging end disengages the retaining end to permit rotation of the bolt with the handle, and a second position, where the engaging end engages the retaining end to lock the handle to the casing so as to prevent rotation of the bolt.
Blake Cassels & Graydon Llp
Hsu Frank
LandOfFree
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