Ball screw
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 26, 2009
Grant Date -
Jan 4, 2007
app pub date -
Jun 16, 2006
filing date -
Jun 16, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A ball screw, which improves its durability under circumstances where a radial load and a moment load are applied to it, has a screw shaft (2) formed with a helical screw groove (2a) on its outer circumferential surface. A nut (3) is adapted to mate with the screw shaft (2). The nut (3) is formed with a helical screw groove (3a) on its inner circumferential surface. The nut helical screw groove (3a) corresponds to the screw shaft screw groove (2a). A number of balls (4) are rollably contained within a ball rolling passage formed by the oppositely arranged screw grooves (2a, 3a). Bridge members (5), each formed with a connecting groove (5a) on its inner circumferential surface, connect the screw grooves (3a) of the nut (3). A contact angle (.alpha.) between each ball (4) and one or both the screw grooves (2a, 3a) is set within a range of about 20.about.40.degree..
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully