Screwdriver and joining device

Claim 2

In combination, a rotational driver and a threaded device to be engaged and driven by said rotational driver, the resistance to rotation of the threaded device being substantial, said threaded device having a head portion and a shank, the head portion provided with a diametrial slot in the top surface thereof, and chordal slot means in the side of the head portion and below the top surface thereof substantially at right angles to the diametral slot, the rotational driver having a shank with an elongated blade at one end, a projection at one side of the blade adjacent the free end of the blade and projection transversely of the blade at right angles to the blade, the blade adapted to engage in the diametral slot for drivingly rotating the threaded device and the projection adapted to engage in the chordal slot means for retaining the blade engaged with the threaded device during rotation in both directions.

Claim 3

The combination of claim 1 further characterized by the provision of a cantilever spring fixed to the shank of the rotation driver and having a free end bearing on the side of the blade opposite from the projection for helping retain a threaded device engaged with the rotational driver blade prior to use and to permit rapid disengagement of the rotational driver from the threaded device after the threaded device has been seated in place.

Claim 4

In combination a tool and a threaded fastener driven by said tool, said tool comprising handle means, a shaft extending from one side of said handle means to an end portion terminating in an elongated, flat, end surface, and a bar-shaped projection on one side of said flat, end surface and extending perpendicular thereto, and a biasing member mounted at one end by a slidable sleeve encircling said shaft, theother end of said biasing member having a curvature inward toward said elongated, flat, end surface, said biasing member being on the opposite side of said flat, end surface from said bar-shaped projection, said threaded fastener comprising a body portion having a threaded end portin and an elongated head portion, said head portion having a diametral slot in the top thereof to receive said elongated, flat, end surface of said tool and chordal slot means in said head portion positioned below the top surface of said head portion to receive said bar-shaped projection, said chordal slot means being perpendicular to said diametral slot, said inwardly curved portion of said biasing member contacting the circumference of said head portion diametrally from said chordal slot means.

Claim 5

In combination a tool and a threaded fastener driven by said tool, said tool comprising handle means, a shaft extending from one side of said handle means to an end portion terminating in an elongated, flat, end surface, and a bar-shaped projection on one side of said flat, end surface and extending perpendicular thereto, and a biasing member mounted at one end by a slidable sleeve encircling said shaft, theother end of said biasing member having a curvature inward toward said elongated, flat, end surface, said biasing member being on the opposite side of said flat, end surface from said bar-shaped projection, said threaded fastener comprising a body portion having a threaded end portin and an elongated head portion, said head portion having a diametral slot in the top thereof to receive said elongated, flat, end surface of said tool and chordal slot means in said head portion positioned below the top surface of said head portion to receive said bar-shaped projection, said chordal slot means being perpendicular to said diametral slot, said inwardly curved portion of said biasing member contacting the circumference of said head portion diametrally from said chordal slot means.

Claim 6

In combination, a tool and a threaded fastener driven by said tool, said tool comprising handle means, a shaft extending from one side of said handle means to an end portion terminating in an elongated flat, end surface, and a bar-shaped projection on one side of said flat, end surface and extending perpendicular thereto, said threaded fastener comprising a body portion having a threaded end portion and an elongated head portion, said head portion having a diametral slot in the top surface thereof to receive said elongated, flat, end surface of said tool and chordal slot means in the side of said head portion positioned below the top surface of said head portion to receive said bar-shaped projection, said chordal slot means being perpendicular to said diametral slot.

Claim 7

In combination, a tool and a threaded fastener driven by said tool, said tool comprising handle means, a shaft extending from one side of said handle means to an end portion terminating in an elongated flat, end surface, and a bar-shaped projection on one side of said flat, end surface and extending perpendicular thereto, said threaded fastener comprising a body portion having a threaded end portion and an elongated head portion, said head portion having a diametral slot in the top surface thereof to receive said elongated, flat, end surface of said tool and chordal slot means in the side of said head portion positioned below the top surface of said head portion to receive said bar-shaped projection, said chordal slot means being perpendicular to said diametral slot.

Claim 8

The combination of claim 4 including a biasing member mounted on said shaft of said tool, said biasing member having a free end on the opposite side of the shaft from said bar-shaped projection, the free end of the biasing member contacting the surface of said head portion diametrally from said chordal slot means.

Claim 9

An elongated device for joining two elements together comprising a body portion, a threaded end portion, and a head portion having a diametral slot in the top surface thereof to receive first means on a tool to turn said device and a chordal slot in said head portion positioned below the top surface of said head portion to receive second means on said tool for retaining said device, said chordal slot being perpendicular to said diametral slot.

Claim 10

An elongated device for joining two elements together comprising a body portion, a threaded end portion, and a head portion having a diametral slot in the top surface thereof to receive first means on a tool to turn said device and a chordal slot in said head portion positioned below the top surface of said head portion to receive second means on said tool for retaining said device, said chordal slot being perpendicular to said diametral slot.

Claim 11

The device according to claim 6 wherein the bottom surface of said chordal slot lies in the same plane as the bottom surface of said diametral slot.