This valve is a check valve having a housing with a check plate mounted therein....http://www.google.ca/patents/US6544235?utm_source=gb-gplus-sharePatent US6544235 - Valve for use with a catheterAdvanced Patent SearchPublication numberUS6544235 B2Publication typeGrantApplication numberUS 09/848,645Publication date8 Apr 2003Filing date3 May 2001Priority date3 May 2001Fee statusPaidAlso published as