Positioning structure of the transmission device of a screw...

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means

Reexamination Certificate

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Details

C173S011000, C227S136000, C081S434000, C081S057370

Reexamination Certificate

active

07401659

ABSTRACT:
A positioning structure of the transmission device of a screw fastening apparatus is disclosed. The transmission device includes a stopping block, gear body and a braking body. An elastic rim is positioned between the lateral side of the stopping block and the inner face of a mobile seat. The gear body is H-shaped structure and one lateral side is provided with a plurality of slanting holes for corresponding protruded blocks, and the other lateral side is provided with a plurality of engaging holes. One side of the seat plate of the braking body is protruded with a shaft for mounting with the gear body, and the stopping block and the elastic rim are mounted to the hole on the mobile seat, and the seat plate is provided with a plurality of engaging blocks to engage with the engaging holes of the gear body. The other lateral side of the seat plate corresponding to the center of the shaft is a slot to accommodate a spring urging a square-shaped board. The stopping block drives the gear body to rotate counter clockwise the engaging hole and the engaging block are engaged and the gear body will be driven to engage with the engaging block so as to prevent screw from shaking until the screw is firmly moved to the screw-in slot and the rotating shaft will precisely push in the screw.

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