#$%^&*AU2005200520B920130207.pdf#####ABSTRACT A trocar 100 for performing a procedure on a patient. The trocar has a hollow cannula 202 with a distal end 204 and a proximal end 206. The trocar 100 also has a housing 210 with a distal end 212 attached to the proximal end 206 of the cannula 202 and a proximal end 214 having a wall 216 attached thereto. The wall has an aperture 218 therethrough. The trocar further includes a seal assembly 2 disposed within the housing. The seal assembly includes a first substantially rigid ring, a second substantially rigid ring, and a plurality of layered elastomeric members 4a-4d compressed therebetween. The first ring has a plurality of distally extending protrusions extending from a distal surface thereof, and the second ring has a plurality of proximally extending protrusions extending from a proximal surface thereof.8/9 218 220 40 216 214 0 20 2 85 210 4a-4d 230 206 FIG. 7 20 004
