Self-relieving fluid coupling
CA 1109099 A · Owner: Deere & Company · Inventors: Shindelar, Aloysius C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Invention A high pressure hydraulic female coupler for mating with a check ball equipped male coupling includes a receptacle having an engagement bore at one end connected to the main bore at the other end. A plug is disposed in the main bore carrying a main poppet valve which is spring loaded so as to block the main bore from the engagement bore and carrying a secondary poppet valve having a portion engaging a stem on the main poppet valve and biased away therefrom to a position blocking the main bore from a secondary port connected to a fluid reservoir. The main poppet valve is equipped with a retaining pin which is slidable in a slot provided in the secondary poppet 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
- Granted September 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 15, 1998.
- 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.