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Patent Searching and Data


Title:
REVERSIBLE RATCHETING SCREWDRIVER WITH IMPROVED REVERSING RING
Document Type and Number:
Japanese Patent JP2008296367
Kind Code:
A
Abstract:

To provide a ratcheting screwdriver preventing excessive fatigue of a user and efficiently performing screwing.

The ratcheting screwdriver comprises: a working end with a handle and a reversible ratchet mechanism therein, and the ratchet mechanism defining a bore which receives one end of an associated shank coaxially therein. A cup-shaped spinner is fixed to the shank and a cup-shaped reversing member is nested in the spinner and is coupled to the ratchet mechanism and has an annular flange operable by a finger and/or thumb of a user's hand which is used for shifting the ratchet mechanism among forward ratcheting, reversing ratcheting and non-ratcheting modes. The outer peripheral surface of the annular flange has circumferentially alternating arcuate recesses and serrated frictional griping regions.


Inventors:
EGGERT DANIEL M
THOMPSON CHRISTOPHER D
Application Number:
JP2008000209118
Publication Date:
December 11, 2008
Filing Date:
August 15, 2008
Export Citation:
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Assignee:
SNAP ON TECHNOL INC
International Classes:
B25B15/04; B25B13/46; B25G1/06; B25G1/08; B25G1/10
Attorney, Agent or Firm:
浅村 皓
浅村 肇
吉田 裕
岩本 行夫