Ball screw

Details Ball screw Ball screw

2005-08-09

2005-08-09

Bucci, David A. (Department: 3682)

Machine element or mechanism

Gearing

Directly cooperating gears

C074S424750

Reexamination Certificate

active

06925900

ABSTRACT:
The ball screw comprises a shaft including a spiral-shaped shaft groove having a semicircular-shaped (Gothic-arch-shaped) section, a nut including a spiral-shaped nut ball groove which corresponds to the shaft groove and has a semicircular-shaped (Gothic-arch-shaped) section, a large number of balls rotatably fitted into between the nut ball groove and shaft groove in such a manner that they are held by and between these two grooves, and a circulation member capable of defining a ball circulation passage for allowing the balls to circulate endlessly therethrough, wherein a portion of the nut ball groove is formed larger in the effective diameter than the remaining portions of the nut.

REFERENCES:
patent: 2508261 (1950-05-01), Hosler
patent: 3667311 (1972-06-01), Wysong
patent: 3673886 (1972-07-01), Tomita et al.
patent: 4070921 (1978-01-01), Arnold
patent: 4221137 (1980-09-01), Futaba
patent: 5022277 (1991-06-01), Shaffer
patent: 5239882 (1993-08-01), Druet
patent: 5749265 (1998-05-01), Namimatsu et al.
patent: 6584869 (2003-07-01), Grosspietsch et al.
patent: 100 22 715 (2000-12-01), None

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