Apparatus for combining linear and rotational motion of an azimuth read/write head
CA 2212485 A1 · Owner: Quantum Corporation · Inventors: Sawtelle, Homer J. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mechanism and method for providing rotational and linear movement to an azimuth tape recording head is disclosed. The mechanism includes a toothed gear upon which the read/write head is mounted. Two identical threaded shafts each extending from, identical stepper motors are mounted on a base along a same, vertical plane as the toothed gear. Rotational axes of the threaded shafts are arranged in a parallel relation such that each is meshably engaged to the toothed gear on opposing sides. Rotational movement of the head is achieved by synchronously rotating the threaded shafts, at the same speed, in opposite directions. Linear movement or lifting/lowering, of the head is achieved by …
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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
- Filed August 7, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2019.
- 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.