Recirculating-ball drive
CA 1159680 A · Owner: Korthaus, Helmut · Inventors: Korthaus, Helmut; Wilke, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A recirculating-ball drive has a ball nut centered on an axis and formed with an internal helical groove and receiving a spindle centered on the axis also and rotatable in the nut about the axis. This spindle is formed with an external helical groove of substantially the same pitch as the groove of the nut and having two turns interrupted by a recess with a substantially planar flat bottom spaced radially outwardly of the axis. Faces of wedges bolted to the flat define thereon a pair of parallel guide surfaces which in turn define with the recess a passage extending between the interrupted turns of the spindle groove at an angle opposite the pitch angle of the spindle groove. An annular row …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2001.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.