Milking pulsator
CA 2083152 C · Owner: Alfa-Laval Agriculture International Ab · Inventors: Olofsson, Hans Kristoffer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A milking pulsator (11) comprises a housing (12) forming a chamber (14), in , which a vacuum passage (39) opens via a first opening. A pulsation channel (33) to be connected to at least one teat cup communicates with the chamber and with atmosphere via a second opening (35). Valve means (21 22) are arranged to close and open , said first and second openings. Each valve means comprises a membrane (25, 26), and a pivoted member (29 30), the membrane , being attached between the pivoted member and the housing (12). The pivoted members are journalled in the housing for pivotal motion back and fourth between closing positions, at which said openings are covered by the membranes of the valve …
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 May 21, 1991 and granted February 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2013.
- 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.