Plate clutch assembly having a torque transmitting member with an improved lubrication controlling dam structure and method of making the same
CA 2264061 C · Owner: Vahle, Harold · Inventors: Vahle, Harold; Bozzo, Saverio; Bhookmohan, Chabi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sheet metal inner torque transmitting member (38) in or for a multiple plate clutch or brake (28) comprises a corrugated cylinder having external tooth surfaces (58) for mating with one group (48) of the multiple plates (44) and , internal trough surfaces (60), with holes (62) therebetween to allow a radially outward flow of coolant or lubricant. At the free end (68) of the trough surfaces (60), a dam structure (64) is provided by axially upsetting , material (at 66) from the end of the trough surfaces (60) so that the , external tooth surfaces (58) are not shortened.
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 July 2, 1997 and granted May 27, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 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.