Direct-acting boost-enhanced pressure regulator
CA 2248562 C · Owner: S.H. Leggitt Company · Inventors: Heald, Paul W.; Turney, Christopher G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A boost-enhanced gas pressure regulator (53) consists of a bonnet (11) and a body (12; main, casing) that are secured together so as to capture a diaphragm (13) between both components. An, actuator (16) providing a pair of control channels (38) and a relief seat (32) in one component is, connected to the diaphragm (13) to be moved with and by the latter. A boost/seat tube (20) has, external guide surfaces (49) which serve to guide and control its movement and it also has an, internal gas flow passage (52) in which an elastomeric seat disk (21; valve member) is mounted. The boost/seat tube (20) is restricted to travel in a linear fashion (direct action) with respect to an, inlet …
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 28, 1997 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 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.