Direct drive unit

Details Direct drive unit Direct drive unit

2006-04-04

2006-04-04

Footland, Lenard A. (Department: 3682)

Bearings

Linear bearing

Recirculating

Reexamination Certificate

active

07021828

ABSTRACT:
Operability, low noise characteristic and endurance are further improved at a reduced cost and easily by suppressing the fluctuation of a pitch between rolling elements due to the effects of swelling caused by oil and fats such as lubricants also in a case of using the elastomer for the material of the retaining piece.In a linear guide device in which a retaining piece100made of an elastomeric material is interposed between each of steel balls B adjacent with each other in the circulating direction, the concaved surface101of the retaining piece100is in contact with the steel ball B adjacent with the retaining piece100at a position for 50% or less of the diameter of the steel ball B, and the rigidity value of the retaining piece100is defined at 0.053 N/μm or more and 0.175 N/μm or less.

REFERENCES:
patent: 6443620 (2002-09-01), Chiu et al.
patent: 2002/0025087 (2002-02-01), Yamaguchi et al.
patent: 2003/0198409 (2003-10-01), Yamaguchi et al.
patent: 1104855 (2001-06-01), None
patent: 63-152023 (1988-10-01), None
patent: 2002130272 (2002-05-01), None

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