Screw and drive element with chamfer
First Claim
1. A screw comprising:
- a screw shaft;
a screw head which adjoins the screw shaft, in which a drive is formed for rotary driving the screw by means of a drive element;
wherein the drive comprises a hollow wing section at an outer side of the screw with a circular hollow core and hollow wings provided along the circumference;
wherein the drive comprises a hollow recess section at an inner side of the screw comprising a hollow cone section;
wherein the drive at a transition between the hollow wing section and the hollow recess section comprises a chamfer section whose outer surface is angled with respect to an outer surface of the hollow wing section and with respect to an outer surface of the hollow recess section;
wherein extensions of the hollow wings extend up into the chamfer section;
wherein the hollow wings from an end of the hollow wing section at an outer side of the screw up to the beginning of the chamfer section have a constant outer diameter; and
wherein the hollow core of the hollow wing section tapers conically towards the inner side of the screw such that a ratio between outer and inner diameters of a hexalobular profile of the hollow wings increases, in an axial direction from the screw head to the screw shaft, to a maximum value being larger than 1.42;
1 and smaller than 1.60;
1.
2 Assignments
0 Petitions
Accused Products
Abstract
Screw for introducing into an underground, comprising a screw shaft and a screw head which is adjoining the screw shaft, in which a drive is formed for rotary driving the screw by a drive element, wherein the drive comprises a hollow wing section at an outer side of the screw with a circular hollow core and hollow wings which are provided along the circumference, wherein the drive comprises a hollow recess section at an inner side of the screw, and wherein the drive at a transition between the hollow wing section and the hollow recess section comprises a chamfer section whose outer surface is angled with respect to an outer surface of the hollow wing section and with respect to an outer surface of the hollow recess section.
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Citations
22 Claims
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1. A screw comprising:
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a screw shaft; a screw head which adjoins the screw shaft, in which a drive is formed for rotary driving the screw by means of a drive element; wherein the drive comprises a hollow wing section at an outer side of the screw with a circular hollow core and hollow wings provided along the circumference; wherein the drive comprises a hollow recess section at an inner side of the screw comprising a hollow cone section; wherein the drive at a transition between the hollow wing section and the hollow recess section comprises a chamfer section whose outer surface is angled with respect to an outer surface of the hollow wing section and with respect to an outer surface of the hollow recess section; wherein extensions of the hollow wings extend up into the chamfer section; wherein the hollow wings from an end of the hollow wing section at an outer side of the screw up to the beginning of the chamfer section have a constant outer diameter; and wherein the hollow core of the hollow wing section tapers conically towards the inner side of the screw such that a ratio between outer and inner diameters of a hexalobular profile of the hollow wings increases, in an axial direction from the screw head to the screw shaft, to a maximum value being larger than 1.42;
1 and smaller than 1.60;
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 18, 19, 20)
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11. A drive element comprising:
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a wing section with a circular core and wings provided along the circumference; a recess section at an end side comprising a cone section; a chamfer section at a transition between the wing section and the recess section, wherein an outer surface of the chamfer section is angled with respect to an outer surface of the wing section and with respect to an outer surface of the recess section; wherein the wings from an end of the wing section which is facing away from the drive of the screw in the rotary operation up to the beginning of the chamfer section have a constant outer diameter; wherein the core of the wing section tapers conically towards the recess section such that a ratio between outer and inner diameters of a hexalobular profile of the wing sections increases, in an axial direction of the drive element towards a tip of the drive element, to a maximum value being larger than 1.42;
1 and smaller than 1.60;
1. - View Dependent Claims (12, 13, 14, 15, 16, 17, 21, 22)
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Specification