Combination driver and combination fastener
View Patent ↗A driver has a tip that enables it to engage each one of a conventional hexagonal-head fastener and a conventional lobed-head fastener. The tip includes alternating flutes and crests. The crests are substantially flat to engage straight walls of a hexagonal-head. The flutes engage the lobed head of the fastener. A socket-type driver engages each type of conventional fastener. A fastener and a pair of socket-type fasteners have alternating flutes, which can be engaged by a conventional lobed-head driver, and crests or sidewall surfaces, which can be engaged by a conventional hexagonal-head driver.
1. A driver including a shaft defining a longitudinal axis and only one driving tip,
said tip including alternating flutes and crests,
each one of the flutes is curved in transverse cross section;
each one of the crests including a first-side surface and an opposing second-side surface;
each one of the first-side surface and the second-side surface is substantially straight in transverse cross section;
whereby the flutes are capable of driving a fastener having a lobed recess and the first-side and the second-side surfaces of the crests are capable of driving another fastener having a straight-walled, hexagonal recess.
2. The driver of claim 1 wherein each one of the flutes includes a first-side portion and a second-side portion, the flute first-side portions are capable of driving the fastener having the lobed recess during clockwise rotation and the flute second-side portions are capable of driving the fastener have the lobed recess during counter-clockwise rotation.
3. The driver of claim 2 wherein the crest first-side surfaces are capable of driving the fastener having the hexagonal recess during clockwise rotation and the crest second-side surfaces are capable of driving the fastener having the hexagonal recess during counterclockwise rotation.
4. The driver of claim 3 wherein a first-side surface of a first crest yields to a first-side portion of a first flute at a first-side transition, the first-side portion of the first flute yields to a second-side portion of the first flute so as to define a flute bottom therebetween, and the second-side portion of the first flute yields to a second-side surface of a second crest at a second-side transition.
5. The driver of claim 1 wherein the crest first-side surfaces and the crest second-side surfaces are planar.
6. The driver of claim 1 wherein the crest first-side surfaces and the crest second-side surfaces are not planar.
7. The driver of claim 6 wherein the crest first-side surfaces and the crest second-side surfaces are straight in transverse cross section.
8. The driver of claim 7 wherein the crest first-side surfaces and the crest second-side surfaces are arcuate in longitudinal profile.
9. The driver of claim 1 wherein the tip is not tapered.
10. The driver of claim 1 wherein the tip is tapered such that the width of the tip decreases proximate its distal end.
11. The driver of claim 1 wherein the tip is back-tapered such that the width of the tip increases proximate its distal end.
12. The driver of claim 1 wherein the flutes are concave.
13. The driver of claim 1 wherein each one of the crest first-side surfaces is approximately coplanar with the crest second-side surface of the immediately adjacent crest.
14. The driver of claim 13 wherein the coplanar first-side surface and second-side surface are interrupted only by a flute.
15. A driver including a shaft defining a longitudinal axis and only one driving tip,
said tip including alternating flutes and crests,
each one of the flutes is curved in transverse cross section;
each one of the crests including a first-side surface and an opposing second-side surface;
each one of the first-side surface and the second-side surface is substantially straight in transverse cross section, the crest first-side surface and the crest second-side surface forming an angle of approximately 120 degrees therebetween;
whereby the flutes are capable of driving a fastener having a lobed recess and the crests are capable of driving another fastener having a straight-walled, hexagonal recess.
16. The driver of claim 15 wherein each one of the crest first-side surfaces and the crest second-side surfaces meet at a point in transverse cross section.
17. The driver of claim 15 wherein a junction portion is disposed between the crest first-side surfaces and crest second-side surfaces, the junction portion is flat in transverse cross section.
18. The driver of claim 15 wherein a junction portion is disposed between the crest first-side surface and crest second-side surface, the junction portion is curved in transverse cross section.
19. A socket-head driver including a shaft defining a longitudinal axis and only one driving tip,
said tip including alternating flutes and crests,
each one of the flutes is curved in transverse cross section;
each one of the crests including a first-side surface and an opposing second-side surface,
each one of the first-side surface and the second side surface is substantially straight in transverse cross section;
whereby the flutes are capable of driving a fastener having a hexagonal-head and at least one of the flutes and the crests are capable of driving another fastener having a lobed head.