Low inertia bearing for resistance seam welding wheel
CA 2304871 A1 · Owner: Van Otteren, Robert G. · Inventors: Van Otteren, Robert G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Seam welding apparatus (50) with a bearing support arrangement for a transversely movable upper welding wheel (51). The upper wheel is nonrotatably secured adjacent one end of an elongate electrically conductive shaft (66), the other shaft end being rotatably supported within an electrically conductive bearing assembly (67) which transmits electricity thereto from an external source (63). A non-rotatable bearing housing (68) is pivotally supported relative to a machine frame (61) by a pivot (74) which extends adjacent the housing perpendicularly to the shaft the pivot being , disposed remote from the wheel. A pressure cylinder (81) and ram (82) are mounted on the frame, the ram being …
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 29, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 29, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2019.
- 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.