Metal working – Method of mechanical manufacture – Process for making bearing or component thereof
Reexamination Certificate
2006-11-29
2008-11-11
Cozart, Jermie E (Department: 3726)
Metal working
Method of mechanical manufacture
Process for making bearing or component thereof
C029S898070, C029S557000, C074S089330, C384S042000, C148S607000
Reexamination Certificate
active
07448134
ABSTRACT:
Pressed shape steel, made of a low cost general steel material that is not hardened, forms a frame with long grooves cut therein. Guide rails, made of a specialized steel material that can be subjected to a hardening treatment, are hardened. Thereafter, outer surfaces of the hardened guide rails are ground and the guide rails are integrally joined in the long grooves. Ball-rolling grooves are formed in the guide rails, thereby completing a guide-equipped frame for an actuator. Because the general steel material and the specialized steel material are principally ferrous materials, both exhibiting a Young's modulus at or above 170 GPa with substantially the same coefficient of linear thermal expansion, the frame needn't be increased in size or have a complex internal structure to reinforce the strength of the frame, and the guide rails remain securely retained in the grooves even if the actuator experiences changes in temperature.
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Nagai Shigekazu
Saitoh Akio
Saitoh Masaru
Cozart Jermie E
Guss Paul A.
SMC Kabushiki Kaisha
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