KR920007754A - Fasteners and fastener driven tools with recessed and non-circular heads - Google Patents

Abstract

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Description

Fasteners and fastener driven tools with recessed and non-circular heads

As this is a public information case, the full text was not included.

1 is a front view of an upright skew gun which constitutes an improvement tool of the preferred embodiment,

FIG. 2 is an enlarged exploded exploded view of the same parts of the upright skewed gun shown in FIG. 1 along skews constituting the improved fastener of the preferred embodiment;

FIG. 3 is an axial view taken along line 3-3 of FIG. 2 in the direction indicated by the arrow, with the same parts shown in FIG. 2, ie a non-circular socket and a centering pin;

Claims (13)

An axis fastener comprising a shank having a non-circular head and a threaded portion in an axial direction for adopting a head cooperating with a drive member having a shaped socket such that the socket can be fitted in the head in an axial direction. The head has a recess extending in the axial direction to the head and forming a continuous upper edge coincident with the shape selected in (a) circle and (b) regular polygon, the concave recess being centered with respect to the socket and the head one another. Fasteners which provide data to be used and which are installed to cooperate with a center dowel pin associated with the drive pin. 2. The fastener of claim 1 wherein the concave recess has a conical truncated surface, the conical truncated surface concentrating towards the axis of the fastener and forming a continuous upper edge coincident with the circle. The fastener according to claim 2, wherein the head is hexagonal when viewed in the axial direction. 2. The fastener of claim 1, wherein the concave recess has a plurality of nearly triangular surfaces, the triangular surfaces arranged in a regular array around the fastener's axis and forming a continuous top edge coincident with the regular polygon. . 5. The fastener of claim 4 wherein the head is hexagonal when viewed in the axial direction and the concave recess has six walls forming a continuous upper edge coinciding with a regular hexagon. 4. A fastener according to claim 3 wherein the shank goes through a drilling tip. A fastener drive tool which can be used to drive a fastener having a fastener comprising a shank with a thread and an axis comprising a head having a concave recess that is non-circular in axial direction and has a concave recess extending in the lateral direction. Extending in the axial direction with an axial and tubular extension, non-circular in axial direction and having a tubular extension with a socket adapted to be axially fitted to the head of the fastener to form a drive relationship, arranged to drive the fastener And (b) an axis substantially coincident with the axis of the drive member, assembled to the drive member for axial movement of the centering pin relative to the socket between the extended position and the retracted position, biased toward the extended position, convex Having an end, the convex end extending in the axial direction beyond the socket in the extended position but in the retracted position Extend in the axial direction through the socket in a retracted manner in the axial direction, insert the convex end into the recessed recess in the head of the fastener and axially in one of the retracted positions in the extended position when the socket is fitted axially to the head of the fastener. A centering pin adapted to move with; The drive member has a non-operational position in which the centering pin is spaced apart from the head of the fastener, the socket is fitted in the axial direction to the head of the fastener, and the centering pin is arranged in the fastener's head to center each other. A fastener drive tool, characterized in that it can be moved between actuation positions to axially move one of the retracted positions in an extended position by inserting a convex end into a recessed recess in the head. 8. The fastener drive tool of claim 7, wherein the convex end of the center dowel pin has a conical truncated surface that points towards the axis of the center dowel pin. 8. The fastener drive tool of claim 7, wherein the convex end of the center dowel pin has a plurality of nearly triangular faces that are focused towards the axis of the center dowel pin. 10. The fastener drive tool of claim 9, wherein the convex end of the centering pin has six faces substantially coincident with a pyramid having a regular hexagon base. 8. The tubular extension of claim 7, wherein the tubular extension is mechanically connected to the drive member, the tubular retainer is disposed in a fixed position within the tubular extension, and the retainer extends through the centering pin for axial movement of the centering pin relative to the retainer. The centering pin is slidably disposed in the tubular extension and adapted to engage the retainer upon axial movement of the centering pin to the extended position, the centering pin being centered so as to bear against the lip. A fastener drive mechanism characterized in that it is biased by a coil spring disposed in a tubular extension around the pin. 12. The fastener drive tool of claim 11 wherein the convex ends of the center dowel pin have a plurality of nearly triangular faces that are directed towards the axis of the center dowel pin. 13. The fastener drive tool of claim 12 wherein the convex end of the centering pin has six faces that substantially match the pyramid with a regular hexagon base. ※ Note: The disclosure is based on the initial application.