Wireworking – Joining wire – Implements
Patent
1997-09-12
1998-12-01
Larson, Lowell A.
Wireworking
Joining wire
Implements
140 57, B21F 1504
Patent
active
058425063
ABSTRACT:
A hand tool for forming and installing wire ties to join rebar segments includes an extended barrel portion having a loop-forming yoke projecting distally therefrom. Within the barrel, a motor-driven wire cutting and twisting apparatus is closely proximate to the yoke. The yoke is provided with a hook shape to receive the bars, and a guide groove to form a half loop of wire about the pair of bars disposed within the hook confines of the yoke. An end plate at the distal end of the barrel includes a diametrical slot having a wire outlet opening at one end in registration with the opening of the wire guide groove in the yoke. At the other end of the slot, an inlet opening is disposed to receive the wire end from the half loop formed by the guide slot of the yoke. A wire guide mechanism directs the wire end from the guide groove of the yoke to the inlet opening of the end plate of the barrel. A rotatable wire twisting disk is disposed proximally to the end plate, the disk including a pair of inwardly spiraling slots disposed to engage the two legs of the wire loop. In addition, a wire cutoff tool is disposed proximally to the disk to severe one leg from a wire feed supply. A sliding mounting bracket supports the yoke at the distal end of the barrel. The mounting bracket translates parallel to the axis of the barrel, whereby at the end of the wire twisting cycle the tool handle is pulled to cause the yoke to displace from the barrel and withdraw the twisted wire loop from the tool.
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RB262/RB472 RE.sup..cndot. Bar-Tier (flyer) Max Co., Ltd.
Larson Lowell A.
Zimmerman Harris
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