Patent ID: 6134995
Filing Date: 2000-10-24
Classification: B25F

Abstract:
A hand operated tool comprising:a tubular casing includingan end wall having an axis and a through hole formed therethrough and offset from said axis,a circumferential wall extending coaxially from said end wall to form an open end opposite to said end wall, said circumferential wall confining a receiving space between said end wall and said open end, and being formed with a cut-out portion for access into said receiving space,a mounting axle extending coaxially from said end wall into said receiving space, anda cover member mounted on said circumferential wall and movable relative thereto between a first position, where said cover member covers said open end, and a second position, where said cover member uncovers said open end, said cover member having a rod retention tube extending therefrom, said rod retention tube projecting outwardly of said receiving space and being aligned with said through hole in said end wall and being in communication with said receiving space when said cover member is at said first position;a locking device for releasably locking said cover member at said first position;a cylindrical rotary bit retaining member inserted removably into said receiving space from said open end when said cover member is at said second position, said bit retaining member having an outer periphery, an axial mounting hole for sleeving rotatably said bit retaining member on said mounting axle insides said receiving space, and a plurality of axially extending bit retaining holes disposed along a circular line between said mounting hole and said outer periphery, said bit retaining member being accessible externally of said casing via said cut-out portion so as to rotate said bit retaining member about said mounting axle in order to align a selected one of said bit retaining holes with said through hole in said end wall and said rod retention tube;a plurality of tool bits disposed in said bit retaining holes, respectively; anda push rod having a bit pushing portion slidably extending into said rod retention tube, and an operating portion extending outwardly from said rod retention tube and operable so that when said cover member is at said first position, said bit pushing portion can force said tool bit in the selected one of said bit retaining holes to extend through said through hole in said end wall.