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Lubricated trocar valve

  • US 5,720,730 A
  • Filed: 09/01/1995
  • Issued: 02/24/1998
  • Est. Priority Date: 09/01/1995
  • Status: Expired due to Fees
First Claim
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1. An elastomeric sealing valve for a trocar comprising upper and lower peripheral rims joined by a generally cylindrical air tight tube, the tube portion of the valve between the rims being in the general form of upper converging and lower diverging planar wall sections which meet along a diametric sealing line defined by touching interior surfaces of the planar wall sections the lower planar walls comprising return panels which protect the integrity of the seal line by resisting the tendency of instruments to disturb the seal line by inverting the upper planar walls when passing through the seal valve, the interior surface having a layer of non-hydrated hydrogel thereon, and a coating of microcapsules containing a liquid covering the hydrogel layer for releasing the liquid to hydrate the hydrogel when the microcapsules are ruptured.

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