Speed governor for rotational drive
CA 2107668 C · Owner: Engle, T. Scott · Inventors: Schwager, Frederic A.; Marason, Gabriel Jr.; Engle, T. Scott
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A speed governor (10) is enclosed within a generally cylindrical housing (70) which defines an interior cylindrical surface (73), A rotor (11) is rotatably supported within the housing (70) and is coupled to a power coupling belt (83) by a pulley (40) formed in the rotor shaft (16, 17). A pair of weighted arms (31 51) are pivotally secured to the rotor (11) forming a pair of centrifugal counterweights (30, 50). A coil spring (60) is commonly coupled between the counterweights (30 50) to provide a drawing, force urging the counterweights (30. 50) to a collapsed inward position. Each counterweight (30 50) supports a friction pad (33, 53) on its outer surface (32 52) facing the cylindrical …
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 January 13, 1993 and granted April 13, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 2015.
- 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.