Castors
CA 1099863 A · Owner: Kegg, Geoffrey E. · Inventors: Fuller, Colin A.; Kegg, Geoffrey E.; Kegg, Jack P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A castor comprising a socket member defined by a base portion and a cup portion extending from the base portion the base portion being adapted to be affixed to the underside of an article, and the cup portion defining a generally domeshaped cavity therein. A ball is engaged in the cavity in a manner to be freely rotatable in any direction in the cavity. The cup portion has three or more rollers rotatably mounted to the wall of the cavity and supports the ball for rotatable movement within the cavity, the rollers being supported on bearings which in turn are supported on inwardly projecting lugs integral with the cavity walls. An annular rim defines an open end of the cavity, through which 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
- Granted April 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 28, 1998.
- 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.