Patent Number: 6,983,808

Title: Power tool with oil circulation apparatus

Abstract: A power tool includes a sleeve, two pistons, a converter and a striker. The sleeve includes an axial aperture defined therein, a space communicated with the axial aperture, two grooves defined in the wall of the space and peripheral apertures communicated with the space. Oil flows into and from the space through the peripheral apertures. The pistons are put in the grooves. The converter is provided between the sleeve and the pistons for converting the rotation of the sleeve into rectilinear movement of the pistons. The striker is driven by the pistons.

Inventors: Chen; Ting-Yuan (Taichung Hsien, TW)


International Classification: B25D 15/00 (20060101)

Expiration Date: 1/10/02018