Bias assembly for ratchet tools

a ratchet wrench and assembly technology, applied in the field of ratchet pawl assemblies, can solve the problems of high torque needed to tighten or loosen the bolt, limited access to the bolt, awkward and difficult to use a traditional (non-ratcheting) tool, etc., to minimize the amount of counter-rotation, minimize the amount of wasted motion, and minimize the effect of playing in the ratchet wrench
USRE44655E1Active Publication Date: 2013-12-24SNAP ON INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
SNAP ON INC
Publication Date
2013-12-24

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Abstract

A ratcheting tool such as a reversible dual-pawl ratchet wrench is disclosed that minimizes wasted motion during ratchet slip or counter-rotation. The ratchet wrench includes a bias assembly that biases the pawls apart to bias a first, selected pawl for a selected drive direction towards engagement with a ratchet gear, and that the biases the selected pawl into a concentric alignment with the ratchet gear. In this manner, non-ratcheting initial rotation of the pawl due to counter-rotation prior to the pawl camming out of engagement with the ratchet gear is eliminated, thus eliminating wasted motion and maximizing the available angular sweep for the wrench.
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Description

FIELD OF THE INVENTION

[0001] The invention relates to ratchet pawl assemblies for ratchet tools and, in particular, to a bias assembly for reducing wasted motion for a ratchet tool or wrench.BACKGROUND

[0002] Currently, hand tools utilizing ratchets are well-known. On a basic level, these ratchet tools operate so that rotation or drive in a first direction engages internal components so that the tool operates in the manner a traditional non-ratchet tool would to provide rotational drive to a workpiece such as a screw or a bolt, for instance. When the tool is rotated in a second direction opposite the first direction, the internal components are able to slip or ratchet over each other so that this rotation does not counter-drive the workpiece. Accordingly, a user of the tool can engage the tool with the work piece and maintain the tool engaged thereto while rotating and counter-rotating the tool to drive the workpiece. The user simply rotates the tool in the first direction for a portio...

Claims

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