Mechanical heart valve with compressible stiffening ring
CA 2178928 A1 · Owner: Carbomedics, Inc. · Inventors: Campbell, Louis A.; Sauter, Joseph A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A prosthetic mechanical heart valve with an annular valve body (18) and with a suture ring (16) and stiffening ring (72) combination wherein the stiffening ring is compressible before contacting a wall of the valve body. The inside diameter (100) of the stiffening ring is consistently greater than the outside diameter (28) of the annular valve body. forming a gap. This inhibits compressive forces from being transmitted to the annular valve body. The heart valve also has beveled stops or recesses for controlling the opening angle of leaflets mounted in the valve body. Because of the gap between the valve body and the stiffening ring, the body can deform in a spring-like manner, providing a …
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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 December 9, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 2016.
- 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.