Pipe insertion machine and method
CA 2172787 C · Owner: Cook Construction Company, Inc. · Inventors: Colter, H. Scott
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pipe insertion machine for pushing new pipe sections (82) into an existing pipeline (22) having a internal diameter is provided including a support, structure(39), translating components(80) and gear reduction components(120). The support structure (39) includes a plurality of support beams rigidly connected to form a frame and a longitudinal axis parallel to the existing pipeline(22). The translating components (80) include a winch drum (90) a winch drive shaft (92), two, translating cables (96) (98), a pushing mechanism (102), and multiple idlers (100). The winch drum (90) and winch drive shaft (92) are supported by the frame (68) in a position such that the axis of rotation of 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 March 27, 1996 and granted June 15, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2018.
- 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.