1. Iron golf club heads, comprising:
a long metal iron head having a hollow interior, a strike face, a hosel, a sole, a back side, a top line, a toe, a heel, and a loft less than 33 \xb0,
said long metal iron head being formed from a first casing and a second casing,
said first casing having said hosel and said strike face,
said strike face having an average wall thickness,
said second casing having said sole, said back side, said top line, a front side located opposite from said back side, and a cavity as viewed from a direction facing said front side,
said first casing being welded to said second casing such that said cavity defines at least a portion of said hollow interior; and
a short metal iron head having a hollow interior, a strike face, a hosel, a sole, a back side, a top line, a toe, a heel, and a loft of at least 33 \xb0,
said short metal iron head being formed from a third casing and a fourth casing,
said third casing having said hosel and said strike face of said short metal iron head,
said strike face of said short metal iron having an average wall thickness,
said fourth casing having said sole, said back side, and said top line of said short metal iron head,
said fourth casing having a front side located opposite from said back side of said fourth casing,
said fourth casing having a cavity as viewed from a direction facing said front side of said fourth casing,
said third casing being welded to said fourth casing such that said cavity of said fourth casing defines at least a portion of said hollow interior of said short metal iron head,
said strike face of said short metal iron head having a substantially uniform wall thickness across an entirety of said strike face of said short metal iron head, said strike face of said long metal iron head having a substantially uniform wall thickness across an entirety of said strike face of said long metal iron,
said average wall thickness of said strike face of said long metal iron head being less than said average wall thickness of said strike face of said short metal iron head.
2. The iron golf club heads of claim 1, said average wall thickness of said strike face of said long metal iron head being less than 3 mm.
3. The iron golf club heads of claim 1, said average wall thickness of said strike face of said long metal iron head being approximately 2.5 mm.
4. The iron golf club heads of claim 1, said average wall thickness of said strike face of said short metal iron head being greater than 2 mm.
5. The iron golf club heads of claim 1, said average wall thickness of said strike face of said short metal iron head being greater than 2.5 mm.
6. The iron golf club heads of claim 1, said average wall thickness of said strike face of said short metal iron head being greater than 3.0 mm.
7. The iron golf club heads of claim 1, said average wall thickness of said strike face of said short metal iron head being approximately 2.85 mm.
8. The iron golf club heads of claim 1, said average wall thickness of said strike face of said short metal iron head being approximately 3.5 mm.
9. The iron golf club heads of claim 1, said average wall thickness of said strike face of said long metal iron head being 2.5 mm or less, said average wall thickness of said strike face of said short metal iron head being greater than 2.5 mm.
10. The iron golf club heads of claim 1, said first casing and said third casing each being a forged casing, said second casing and said fourth casing each being a cast casing.
11. The iron golf club heads of claim 1, said first casing being formed from a first steel, said third casing being formed from a second steel.
12. The iron golf club heads of claim 1, said strike face of said first casing having an average hardness between HRC25\u201342, said strike face of said third casing having an average hardness between HRB80\u2013HRC20.
13. The iron golf club head of claim 1, wherein said cavity of said second casing is one cavity and the second casing comprises another cavity as viewed from a direction facing said back side, said one cavity and said another cavity each being elongated and each generally extending in a direction from said heel to said toe, said another cavity being located above said one cavity as measured with respect to said sole.
14. The iron golf club head of claim 1, wherein said cavity of said fourth casing is one cavity and the fourth casing comprises another cavity as viewed from a direction facing said back side, said one cavity and said another cavity each being elongated and each generally extending in a direction from said heel to said toe, said another cavity being located above said one cavity as measured with respect to said sole.
15. Iron golf club heads, comprising: a long metal iron head having a hollow interior, a strike face, a hosel, a sole, a back side, a top line, a toe, a heel, and a loft less than 33\xb0,
said long metal iron head being formed from a first casing and a second casing,
said first casing having said hosel and said strike face,
aid strike face having an average hardness,
aid second casing having said sole, said back side, said top line, a front side located opposite from said back side, and a cavity as viewed from a direction facing said front side,
said first casing being welded to said second casing such that said cavity defines at least a portion of said hollow interior; and
a short metal iron head having a hollow interior, a strike face, a hosel, a sole, a back side, a top line, and a loft of at least 33\xb0,
said short metal iron head being formed from a third casing and a fourth casing,
said third casing having said hosel and said strike face of said short metal iron head,
said strike face of said short metal iron having an average hardness,
said fourth casing having said sole, said back side, said top line, said toe, and said heel of said short metal iron head,
said fourth casing having a front side located opposite from said back side of said fourth casing,
said fourth casing having a cavity as viewed from a direction facing said front side of said fourth casing,
said third casing being welded to said fourth casing such that said cavity of said fourth casing defines at least a portion of said hollow interior of said short metal iron head,
said average hardness of said strike face of said long metal iron being greater than said average hardness of said strike face of said short metal iron.
16. The iron golf club heads of claim 15, said average hardness of said strike face of said long metal iron head being between HRC25\u201342.
17. The iron golf club heads of claim 15, said average hardness of said strike face of said short metal iron head being between HRB80\u2013HRC20.
18. The iron golf club heads of claim 15, said average hardness of said strike face of said long metal iron head being between HRC25\u201342, said average hardness of said strike face of said short metal iron head being between HRB80\u2013HRC20.
19. The iron golf club heads of claim 15, said first casing and said third casing each being a forged casing, said second casing and said fourth casing each being a cast casing.
20. The iron golf club heads of claim 15, said first casing being formed from a first steel, said third casing being formed from a second steel that is different than said first steel.
21. The iron golf club head of claim 15, wherein said cavity of said second casing is one cavity and the second casing comprises another cavity as viewed from a direction facing said back side, said one cavity and said another cavity each being elongated and each generally extending in a direction from said heel to said toe, said another cavity being located above said one cavity as measured with respect to said sole.
22. The iron golf club head of claim 15, wherein said cavity of said fourth casing is one cavity and the fourth casing comprises another cavity as viewed from a direction facing said back side, said one cavity and said another cavity each being elongated and each generally extending in a direction from said heel to said toe, said another cavity being located above said one cavity as measured with respect to said sole.
23. An iron golf club head having a hollow interior, a strike face, a hosel, a sole, a back side, a top line, a toe, and a heel, said iron golf club head comprising:
a first metal casing having said hosel and said strike face; and
a second metal casing having a metallic wall that defines said sole, said back side, said top line, and a front side located opposite from said back side,
said second casing having a first cavity as viewed from a direction facing said back side,
said second casing having a second cavity as viewed from a direction facing said front side,
said first cavity and said second cavity each being elongated and each generally extending in a direction from said heel to said toe,
said first cavity being located above said second cavity as measured with respect to said sole,
said first casing being welded to said second casing such that said second cavity defines at least a portion of said hollow interior of said iron golf club head.
24. The iron golf club head of claim 23, one portion of said metallic wall being substantially normal to said strike face and defining both a side of said first cavity and a side of said second cavity.
25. The iron golf club head of claim 24, said side of said first cavity being a first side, another portion of said metallic wall defining both said sole and a second side of said second cavity located opposite from said first side.
26. The iron golf club head of claim 24, said side of said second cavity being a first side of said second cavity, another portion of said metallic wall defining both said top line and a second side of said second cavity located opposite from said first side of said second cavity.
27. The iron golf club head of claim 23, said metallic wall defining a planar surface at an innermost location within said first cavity.
28. The iron golf club head of claim 23, said first casing having a planar wall that defines said strike face, said planar wall having a periphery, said second casing having an edge that receives said periphery.
29. The iron golf club head of claim 23, said first casing being a forged casing.
30. The iron golf club head of claim 29, said second casing being a cast casing.
31. The iron golf club head of claim 23, said first casing having an average hardness between HRC25\u201342.
32. The iron golf club head of claim 23, said first casing having an average hardness between HRB80\u2013HRC20.
33. An iron golf club head having a hollow interior, a strike face, a hosel, a sole, a back side, a top line, a toe, and a heel, said iron golf club head comprising:
a first metal casing having said hosel and said strike face;
said strike face of said first metal casing comprising a center and an edge, said center of said strike face possessing a hardness that is different from the hardness of the edge of the strike face;
a second metal casing having a metallic wall that defines said sole, said back side, said top line, and a front side located opposite from said back side,
said second casing having a first cavity as viewed from a direction facing said front side and a second cavity as viewed from a direction facing said back side,
said first and second cavities extending in a direction from said heel to said toe,
said first casing being welded to said second casing such that said first cavity defines at least a portion of said hollow interior of said iron golf club head.
34. The iron golf club head of claim 33, wherein the hardness of the center of the strike face is approximately HRC35 and the hardness of the edge of the strike face is about HRC25 said first casing having an average hardness between HRC25\u201342.
35. The iron golf club head of claim 33, wherein said first cavity is located above said second cavity as measured with respect to said sole.
36. Iron golf club heads, comprising:
a long metal iron head having a hollow interior, a strike face, a hosel, a sole, a back side, a top line, a toe, a heel, and a loft,
said long metal iron head being formed from a first casing and a second casing,
said first casing having said hosel and said strike face,
said second casing having said sole, said back side, said top line, a front side located opposite from said back side, and a cavity as viewed from a direction facing said front side,
said first casing being welded to said second casing such that said cavity defines at least a portion of said hollow interior; and
a short metal iron head having a hollow interior, a strike face, a hosel, a sole, a back side, a top line, a toe, a heel, and a loft greater than the loft of the long metal iron,
said short metal iron head being formed from a third casing and a fourth casing,
said third casing having said hosel and said strike face of said short metal iron head,
said fourth casing having said sole, said back side, and said top line of said short metal iron head,
said fourth casing having a front side located opposite from said back side of said fourth casing,
said fourth casing having a cavity as viewed from a direction facing said front side of said fourth casing,
said third casing being welded to said fourth casing such that said cavity of said fourth casing defines at least a portion of said hollow interior of said short metal iron head,
said strike face of said short metal iron head and said strike face of said long metal iron head being fabricated of different metal materials, and at least a center of said strike face of said long metal iron head being heat treated while said strike face of said short metal iron head is not heat treated so that said strike face of said long metal iron head possesses an average hardness greater than the average hardness of said strike face of said short metal iron head.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An electrical connector comprising an insulator and a plurality of contacts arranged in line in a width direction of said insulator;
wherein said contacts have a contact portion adapted to be detachably connected to a first connection object and a terminal portion adapted to be fixedly connected to a second connection object, respectively;
said contact portions of said contacts are arranged in first, second, and third contact portion tiers superposed in a vertical direction perpendicular to the width direction of said insulator;
said terminal portions of the contacts having the contact portions belonging to the first contact portion tier is arranged in a first terminal portion tier of the first and second terminal portion tiers superposed in the vertical direction of said insulator;
said terminal portions of the contacts having the contact portions belonging to the third contact portion tier is arranged in said second terminal portion tier; and
said terminal portions of the contacts having the contact portions belonging to the second contact portion tier are arranged so as to be alternately allocated to said first terminal portion tier and said second terminal portion tier.
2. The electrical connector according to claim 1, wherein said contacts having the contact portions belonging to the first contact portion tier and said contacts having the contact portions belonging to the third contact portion tier are same in shape; and
said contacts having the contact portions belonging to the second contact portion tier are same in shape.
3. The electrical connector according to claim 1, wherein said second connection object has a plate-like shape, and
said first and said second terminal portion tiers are fixedly connected to first and second plate surfaces of said second connection object, respectively.
4. The electrical connector according to claim 3, wherein said contacts have elasticity, and
said first and second terminal portion tiers press against said first and said second plate surfaces of said second connection object, respectively, so as to hold therebetween said second connection object in said vertical direction.