Air saving sleeve gun
CA 2132564 C · Owner: Harrison, Earnest R. · Inventors: Harrison, Earnest R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A seismic source apparatus 10 includes body 12 cap, 22, actuator 24, and shuttle 26. Body 12 includes a main chamber 14 that is formed therein and adapted to receive a charge of compressed air. Actuator 24 is preferably a solenoid actuated valve, capable of rapidly opening and closing in response to an electrical signal. Seismic source apparatus 10 includes a solenoid chamber orifice 38 that is positioned within a fill passage 34 to enable fluid communication between fill passage 34 and solenoid chamber 40. Solenoid chamber orifice 38 and solenoid chamber 40 are configured to provide a quick burst of high pressure air through actuator 24 when actuator 24 is opened in order to start the …
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 September 21, 1994 and granted August 11, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 21, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2016.
- 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.