Ball screw for vacuum apparatus

Details Ball screw for vacuum apparatus Ball screw for vacuum apparatus

1997-02-04

1998-07-21

Marmor, Charles A.

Machine element or mechanism

Gearing

Teeth

744248R, 384492, F16H 2522, F16C 3366

Patent

active

057821356

ABSTRACT:
A ball screw for a vacuum apparatus which includes a screw shaft having a spiral inner raceway formed on an outer peripheral surface thereof, a ball nut having a spiral outer raceway formed on an inner peripheral surface thereof, a plurality of balls disposed in a spiral space defined between the inner raceway and the outer raceway, and circulating members connecting ends of the spiral space to each other to define a continuous ball circulating passage. The plurality of balls are first balls formed of high polymer material containing polytetrafluoroethylene as a main component and second balls formed of either a metallic material or a ceramic material. The first balls circulate through the circulating passage together with the second balls. The second balls have lubricating films of crystalline polytetrafluoroethylene formed on the surface thereof.

REFERENCES:
patent: 2869377 (1959-01-01), Pieterse
patent: 3132719 (1964-05-01), Cole
patent: 5150398 (1992-09-01), Nishioka et al.
patent: 5163757 (1992-11-01), Graham
patent: 5168767 (1992-12-01), Morita
patent: 5207513 (1993-05-01), Kondo et al.

Affiliated with

Also associated with

Rating

Ball screw for vacuum apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ball screw for vacuum apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ball screw for vacuum apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1638080