Impact device
CA 2118327 C · Owner: Ottestad, Jack Benton · Inventors: Ottestad, Jack Benton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An impact device (10) for breaking up and separating hard material comprises an actuating system for providing a faster cycle rate as well as an increased impact force. More specifically the device (10) includes a pair of pistons (173 175) movably, arranged in a cylinder (28) to cooperate in compressing the gaseous component prior to initiating the blow. A closed tube (204) is provided to fluidly interconnect opposite chambers (177 181) adjacent the two pistons (173, 175) to coordinate the different movements of the pistons to effect the desired compression. The impact device (10) is particularly well suited for use in an impact bucket (12).
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 5, 1993 and granted November 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2015.
- 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.