Biased seal assembly for high pressure fluid pump
CA 2303103 C · Owner: Madden, Katherine M. · Inventors: Raghavan, Chidambaram; Tremoulet, Olivier L. Jr.; Madden, Katherine M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for biasing a seal assembly in a high pressure fluid pump. In one embodiment, the fluid pump includes a plunger which reciprocates within a high pressure cylinder a seal carrier disposed about the plunger, and a seal supported by the seal carrier and sealably engaged with the plunger. The, seal may be biased toward the seal carrier with a spring engaged by a collar within the, cylinder and may include a flange that engages the spring to restrict lateral motion of a, spring relative to the reciprocating plunger. The flange may engage an inner and/or an, outer surface of the spring. Where the spring is a coil spring the flange may , be, continuous around the …
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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 September 17, 1998 and granted November 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2020.
- 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.