Apparatus for use in servicing valves
CA 2066498 C · Owner: Stickley, Andrew John · Inventors: Stickley, Andrew John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for radiator valve servicing has a main body (1) including a valve(5) and an adaptor(2) connecting the main body to a valve assembly support body (102.) Mounted for movement within the main body is an extractor(3)comprising a shaft(30) and coupler (31) which is connected by a bayonet fitting (39,40)to the shaft and mechanically connected by a screw (37) to the valve assembly spindle (103). The coupler includes a socket(33)which fits on and facilitates unscrewing of the spindle and valve assembly from the support body. After being unscrewed, the valve assembly can be lifted past the valve (5)and, after closing the valve withdrawn, reliably from the main body because of the screw …
Read the whole patent
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 21, 1992 and granted July 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2014.
- 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.