Machine element or mechanism – Gearing – Directly cooperating gears
Reexamination Certificate
2006-05-09
2006-05-09
Joyce, William C. (Department: 3682)
Machine element or mechanism
Gearing
Directly cooperating gears
C074S424860
Reexamination Certificate
active
07040189
ABSTRACT:
A circulation member of a ball screw for circulating a ball rolling on a spiral ball rolling groove formed on a screw shaft. The circulation member includes a central portion and a pair of leg portions disposed at both ends of the central portion so as to extend therefrom, the leg portions having inner peripheries having center lines inclined in directions different from each other with respect to a center line of an inner periphery of said central portion. The leg portions also have outer peripheries having center lines being parallel to each other and have thicknesses, different in circumferential directions thereof, at cross sections in directions normal to center lines of the outer peripheries of the respective leg portions.
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Abe Yasuyuki
Iida Katsuya
Kadono Toshiaki
Michioka Hidekazu
Niwa Hiroshi
Joyce William C.
THK Co. Ltd.
Westerman, Hattori, Daniels & Adrian , LLP.
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