1. A golf club head comprising:
a ball-striking face; and
at least two channels formed in the ball-striking face, wherein the channels are separated by a land portion of the ball-striking face extending therebetween, wherein the land portion is associated with at least a first step portion extending at a first elevation and a second step portion extending at a second elevation, the second elevation being higher than the first elevation relative to a bottom of the channels, and wherein each of the first and second step portions is so dimensioned as to be associated with a substantially hydrophobic contact angle.
2. The golf club head of claim 1, wherein the substantially hydrophobic contact angle is about 80 degrees or greater.
3. The golf club head of claim 1, wherein the first step portion extends substantially parallel to the second step portion.
4. The golf club head of claim 1, wherein at least one of the first and second step portions extends substantially parallel to at least one of the channels.
5. The golf club head of claim 1, wherein each of the first and second step portions is substantially free of a polymer coating.
6. The golf club head of claim 1, wherein each of the first and second step portions is associated with at least one of a height being about 5 micrometers to about 50 micrometers, a height being about 5 micrometers to about 30 micrometers, or a height being about 20 micrometers.
7. The golf club head of claim 1 further comprising a third step portion extending at substantially the same elevation as the second step portion, wherein the second and third step portions are separated by the first step portions extending therebetween.
8. The golf club head of claim 1, wherein at least one of the channels is associated with a longitudinal axis, and wherein the second step portion is recessed relative to the first step portion toward a direction substantially perpendicular to the longitudinal axis.
9. The golf club head of claim 1, wherein the first step portion is abutting the second step portion.
10. The golf club head of claim 1, wherein each of the first and second step portions is associated with a surface roughness of about 5 micrometers or less.
11. The golf club head of claim 1, wherein at least one of the first and second step portions is formed by laser ablation.
12. A golf club head comprising:
a ball-striking face; and
at least two channels formed in the ball-striking face, wherein the channels are separated by a land portion of the ball-striking face extending therebetween, wherein the land portion is associated with at least a first step portion extending at a first elevation, a second step portion extending at a second elevation, the second elevation being higher than the first elevation relative to a bottom of the channels, and a third step portion extending at substantially the same elevation as the second step portion, wherein the first step portion abuts the second and third step portion, and wherein each of the first, second, and third step portions is so dimensioned as to be associated with a substantially hydrophobic contact angle.
13. The golf club head of claim 12, wherein each of the first, second, and third step portions is associated with at least one of a height being about 5 micrometers to about 50 micrometers, a height being about 5 micrometers to about 30 micrometers, or a height being about 20 micrometers.
14. The golf club head of claim 12, wherein each of the first, second, and third step portions is associated with a surface roughness of about 5 micrometers or less.
15. The golf club head of claim 12, wherein at least one of the first, second, and third step portions is formed by laser ablation.
16. A golf club comprising:
a shaft; and
a golf club head coupled to the shaft, the golf club head having a ball-striking face and at least two channels formed in the ball-striking face, wherein the channels are separated by a land portion of the ball-striking face extending therebetween, wherein the land portion is associated with at least a first step portion extending at a first elevation and a second step portion extending at a second elevation, the second elevation being higher than the first elevation relative to a bottom of the channels, and wherein each of the first and second step portions is so dimensioned as to be associated with a substantially hydrophobic contact angle.
17. The golf club of claim 16, wherein each of the first and second step portions is associated with at least one of a height being about 5 micrometers to about 50 micrometers, a height being about 5 micrometers to about 30 micrometers, a height being about 20 micrometers.
18. The golf club of claim 16 further comprising a third step portion extending at substantially the same elevation as the second step portion, wherein the second and third step portions are separated by the first step portions extending therebetween.
19. The golf club of claim 16, wherein each of the first and second step portions is associated with a surface roughness of about 5 micrometers or less.
20. The golf club of claim 16, wherein at least one of the first and second step portions is formed by laser ablation.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A prehension device for grasping an implant, implanting the implant and manipulating the implant, comprising: prehension means cooperative with receiving means, wherein the prehension means has in longitudinal section an arc-shaped form, the peripheral edges of which are provided with at least one peripheral chamfer and the arc-shaped form has at one end at least one cylinder.
2. The prehension device according to claim 1, wherein the arc-shaped form has a base and at least one base chamfer at the base.
3. The prehension device according to claim 1, wherein the cylinder has a substantially conical end.
4. The prehension device according to claim 3, wherein the conical end(s) is (are) substantially spherical.
5. The prehension device according to claim 1, wherein the prehension means has a prepositioning stop having at least two surfaces.
6. The prehension device according to claim 1, wherein the receiving means has a form which is complementary to that of the prehension means.
7. The prehension device according to claim 1, wherein the height of the cylinder(s) is smaller than the total height of the arc-shaped form.
8. A surgical instrument equipped with at least one prehension device according to claim 1.
9. An implant equipped with at least one prehension device according to claim 1.