초록 ▼

A composite magnetic-field screwdriver (10) that consists of two elements: a non magnetic-conductive housing (12) and a selectable, magnetic-conductive tool bit (100). The housing (12) includes a tool bit cavity (80) that accepts the tool bit (100) and a drill-chuck connector sleeve (48) into which

A composite magnetic-field screwdriver (10) that consists of two elements: a non magnetic-conductive housing (12) and a selectable, magnetic-conductive tool bit (100). The housing (12) includes a tool bit cavity (80) that accepts the tool bit (100) and a drill-chuck connector sleeve (48) into which is frictionally inserted a non magnetic-conductive drill chuck connector (88). The housing (12) includes an upper ring magnet (60) and a lower circular magnet (84). The two magnets operate in combination to produce a composite magnetic flux path. The composite magnetic flux path is activated only when a workpiece (250) is attached to a tool bit (100) that has been inserted into the tool bit cavity (80). The composite magnetic flux path results in a high-level gauss at the bit's upper section which allows the workpiece i.e., a screw to be firmly attached to the tool bit (100). In a second embodiment, a magnetic housing (150) is utilized that is designed to contain a single concentric dual magnet (174) in lieu of the two magnets of the preferred embodiment. The dual magnet (174) also produces a composite magnetic flux path that functions in a similar manner as described for the preferred embodiment.

대표청구항 ▼

[ I claim:] [1.] A composite magnetic-field screwdriver comprising:a) a non magnetic-conductive housing having:(1) an upper sleeve, a polygon sleeve, a lower magnet sleeve and a drill chuck connector sleeve,(2) a ring magnet having an outer surface and an inner surface, wherein said ring magnet is i

[ I claim:] [1.] A composite magnetic-field screwdriver comprising:a) a non magnetic-conductive housing having:(1) an upper sleeve, a polygon sleeve, a lower magnet sleeve and a drill chuck connector sleeve,(2) a ring magnet having an outer surface and an inner surface, wherein said ring magnet is inserted into the upper sleeve with the outer surface of said ring magnet interfacing with the upper sleeve,(3) an upper non magnetic-conductive sleeve inserted into said upper ring magnet wherein the area inward from said non magnetic-conductive sleeve forms a drill bit cavity,(4) a circular magnet frictionally inserted into the lower magnet sleeve,(5) a non magnetic-conductive drill chuck connector frictionally inserted into the drill chuck connector sleeve, andb) a magnetic-conductive tool bit comprising:(1) a magnetic-conductive bit body having an upper section integral with a lower section that further having a lower surface, wherein the upper and lower sections are dimensioned to slidably fit into the tool bit cavity and the polygon sleeve respectively, with the lower surface interfacing with said circular magnet,(2) a non magnetic-conductive sleeve having an upper edge and an inside diameter dimensioned to surround the upper section of said tool bit, and(3) a magnetic-conductive tool-bit gripping disc having a center bore dimensioned to fit over and be attached to the upper edge of said non magnetic-conductive sleeve.