Automatic grease dispenser
CA 2080880 C · Owner: Chien, Hui-Mei · Inventors: Chien, Hui-Mei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automatic grease dispenser using a motor to drive a rotary shaft via a reduction gear set for displacing a pusher downward to squeezing a grease out of a grease pack through an outlet in constant quantity at fixed intervals, and having a positioning element inserted to an longitudinal groove on a piston rod of the pusher to permit only vertical movement but prevent from rotation of the pusher following rotation of the rotary shaft.
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 October 19, 1992 and granted May 26, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 19, 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.