Patent Number: 7,086,483

Title: Electric tool

Abstract: An electric tool having the capability of achieving a high working efficiency is provided. This tool comprises an output shaft rotated by reversible motor, a rotational-direction switch for switching a rotational direction of the output shaft in either forward or reverse direction, first memory for storing a plurality of operation modes of the output shaft with respect to one of the forward and reverse directions, operation-mode switch for selecting one from the operation modes, second memory for temporarily storing an operation mode selected by the operation-mode switch in a use of the electric tool at the one of the forward and reverse directions; and a controller for automatically setting the electric tool in the operation mode stored in the second memory in the next use of the electric tool at the one of the forward and reverse directions.

Inventors: Arimura; Tadashi (Kyoto, JP), Miyazaki; Hiroshi (Hikone, JP), Ito; Masatoshi (Hikone, JP), Okamura; Yukihiko (Hirakata, JP), Sakamoto; Kenji (Toyonaka, JP)

Assignee: Matsushita Electric Works, Ltd.

International Classification: E21B 44/00 (20060101); B23Q 5/28 (20060101); E21B 44/04 (20060101)

Expiration Date: 8/08/02018