초록 ▼

A sure grip screwdriver system comprises a shaft. The shaft has a handle end and a working end. The shaft has a working inner portion and a working outer portion. The working inner portion is adjacent to the handle end. The working outer portion is adjacent to the working end. The working outer port

A sure grip screwdriver system comprises a shaft. The shaft has a handle end and a working end. The shaft has a working inner portion and a working outer portion. The working inner portion is adjacent to the handle end. The working outer portion is adjacent to the working end. The working outer portion further has a generally cube-shaped configuration of a first smaller size. The working inner portion further has a generally cube-shaped configuration of a second larger size. Last provided is a shaft support. The shaft support has a recess at one end to receive the handle end of the shaft.

대표청구항 ▼

1. A system for fastening purposes comprising, in combination:a shaft fabricated of a rigid metallic material in a cylindrical configuration with an axis and having a handle end and a working end, the shaft having a working inner portion and a working outer portion and with a square flat cut face on

1. A system for fastening purposes comprising, in combination:a shaft fabricated of a rigid metallic material in a cylindrical configuration with an axis and having a handle end and a working end, the shaft having a working inner portion and a working outer portion and with a square flat cut face on the outermost extent of the working end perpendicular to the axis of the shaft, the working outer portion having a generally cube-shaped configuration with a square cross section and an axial length of a first smaller size adjacent to the face, the working outer portion having four rectangular faces all in contact with and perpendicular to the square flat cut face of the shaft, the working inner portion having a generally cube-shaped configuration with a square cross section and an axial length of a second larger size adjacent to the working outer portion, with a bevel adjacent to the working inner portion remote from the square flat cut face;a screwdriver handle having a shaft end and a gripping surface end, the shaft end having a generally cylindrical recess to securely receive and retain in one position the handle end of the shaft and with the gripping surface end having a plurality of axial indentations to facilitate the user's grip of the system; anda threaded fastener having a threaded portion and a head portion, the threaded portion having threads for coupling to a recipient surface upon rotation and with the head portion having a cylindrical configuration with a central stepped recess, the stepped recess having a cube-shaped interior reception area and a cube-shaped exterior reception area with the interior reception area being smaller than the exterior reception area, the interior reception area including a square flat cut face and four rectangular faces all in contact with and perpendicular to the square flat cut face of the interior reception area, the interior reception area adapted to snugly receive the working outer portion of the shaft and with the exterior reception area adapted to snugly receive the working inner portion of the shaft and alternatively, wherein the threaded fastener is of a smaller size, the working outer portion is snugly receivable by the exterior reception area of the threaded fastener.