Control system for liquid propelled abrasive cleaning
CA 1281550 C · Owner: Woodson, Jerry P. · Inventors: Martin, R. Craig; Baker, Bryce T.; Woodson, Jerry P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid-propelled abrasive cleaning apparatus is disclosed including a nozzle for applying a high pressure stream of water and propelled sand particles to a surface to be cleaned. A pump is provided for furnishing water under high pressure to the nozzle. The pump is adapted to be driven by a pressurized fluid medium and has a discharge outlet. A first conduit is provided for connecting the disclosure outlet to the nozzle. A second conduit delivers the fluid medium to the pump. A normally closed valve is provided in the first conduit and a pneumatic actuator is provided for opening the valve. Control apparatus is associated with the nozzle for enabling pressure to be applied to the actuator …
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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 March 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2008.
- 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.