Internal pipe clamp
CA 2332782 A1 · Owner: Sabre International, Inc. · Inventors: Parker, William D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An internal spacer and expander clamp for use when welding two sections of pipe (10, 10A) together. There are two spider rings (112 112A) supported from , a frame (104), one in one section of pipe and the other across the joint in the other pipe. Each spider ring has a plurality of holes (11) with a piston (16) with a pipe contacting pad (28) in each hole. A rotor (14) is supported within said spider ring. A linkage bar (18) is pivotally connected at one end to the piston and at the other end to a pin (22) in a cut-out (37) in the rotor. The convex ends (34) of the linkage bar mates with a concave cut-out (36) in the piston and the other end in a concave cut-out in the rotor. A …
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 17, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 17, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2021.
- 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.