Annular support for a seal for a tilt piston
CA 2065733 C · Owner: Ingersoll-Rand Company · Inventors: Plummer, Darrill L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus includes a tilt piston (10) having a piston head (12). The piston head (12) is reciprocally disposed within a cylindrical bore (16) formed in a housing (14) the bore (16) being, oriented along an axis. A seal (26) is mounted circumferentially about the piston head (12). The seal (26) has an outer diameter (27) that exceeds an inner diameter (56) of the cylindrical bore (16). The seal (26) extends radially in a first direction having an axial component. A support (52) is mounted circumferentially of the piston head adjacent the seal (26). The support (52) has an outer diameter (54) less than the outer diameter (27) of the seal (26). The seal (26) is a continuous annular ring …
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 16, 1991 and granted February 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 16, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 16, 2013.
- 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.