Pipe burster
CA 1290318 C · Owner: Carruthers, Alec Reginald · Inventors: Carruthers, Alec Reginald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The burster has a body in two parts 10 12 separable by pistons 20, 22, 24 in cylinders 14 16, 18 in the part 12. The pistons have piston rods 32, 34, 36 secured to the part 10 by screws 54. The relative rectilinear movement of the parts 10, 12 is guided by the sliding engagement between the internal cylindrical surfaces 58, 60 62 of the rings 44 and 46 and, of the cylinder 18 and the external surfaces of the piston rods 32 34, 36. Separating movement is effected by fluid fed into the three cylinders via a passage 88 and is limited by engagement between stop surfaces 66, 68 on the part 10 and stop surfaces on the part 12. Approach movement is effected by fluid fed into two cylinders 14 16 …
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 October 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 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.