Structure for coupling field windings to motor brushes
CA 2062647 C · Owner: Crevling, R. Lent, Jr. · Inventors: Baer, Mark; Crevling, R. Lent, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved structure for coupling field windings to motor brushes, including a nonconductive brush housing, a conductive brush holder located in the brush housing, a wire guide for guiding the field winding to the tab, the brush holder including a conductive tab extending outside the brush housing and means for electrically coupling the field winding to the tab. The brush holder holds the brush for movement along a predetermined axis. The wire guide guides the field winding to the tab along a predetermined axis which includes a portion extending generally parallel to the predetermined axis.
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 11, 1992 and granted October 17, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2014.
- 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.