Seal for ball screw and ball screw utilizing same

Details Seal for ball screw and ball screw utilizing same Seal for ball screw and ball screw utilizing same

2005-07-08

2008-10-07

Ridley, Richard W L (Department: 3682)

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

C074S089440

Reexamination Certificate

active

07430933

ABSTRACT:
A seal for a ball screw is provided with a foreign material removing member having a hole of a shape corresponding to a sectional shape of a ball screw shaft taken perpendicularly to an axis thereof to prevent a foreign material from invading from an outside of a ball screw nut and a seal member having a hole of a shape corresponding to a sectional shape of the ball screw shaft to retain a lubricant existing inside the ball screw nut. The foreign material removing member and the seal member are mounted to the ball screw shaft, at each of both the axial ends of the nut, while being overlapped to each other in a state that inner peripheral portions of the foreign material removing member and the seal member contact an outer peripheral surface of the ball screw shaft and the ball rolling groove thereof. The foreign material removing member is disposed outside the seal member in the axial direction of the ball screw nut.

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Japanese Office Action dated Feb. 12, 2008 (mailing date), issued in corresponding Japanese Patent Application No. 2002-062602.

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