Adjustable electronic position indicator apparatus
CA 2234187 C · Owner: Itt Manufacturing Enterprises, Inc. · Inventors: Butler, Ronald G.; Houck, Wayne R.; Miller, Roy D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for providing indication of valve position of a manual valve is disclosed for a valve having a rotary, operating assembly journaled in a housing, the operating assembly comprising a handwheel a bushing fastened, to the handwheel, and a spindle threadedly engaged to the bushing to cause translation of the spindle in response to rotation of the handwheel and the bushing, the apparatus for enclosure in the housing comprising a hub coupled to the bushing for transmitting rotary motion in response to rotation of the bushing; translation means for translating the rotary motion into an electrical signal; and circuitry means responsive to the electrical signal for indicating position …
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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 April 7, 1998 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 2020.
- 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.