Universal seal for trocar assembly

Details Universal seal for trocar assembly Universal seal for trocar assembly

1991-10-18

1993-03-30

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604256, A61M 2902

Patent

active

051979551

ABSTRACT:
Trocar assembly devices are disclosed that include an improved seal assembly that accommodates instruments having a wide range of diameters. The seal assembly includes a universal seal member that is generally of hourglass shape defining converging and diverging side walls that form a constricted center bore portion therebetween. Various alternative means are provided to either increase or decrease the inner diameter of the center bore portion of the seal member.

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patent: 4978341 (1990-12-01), Niederhauser
patent: 5030206 (1991-07-01), Lander
patent: 5053016 (1991-10-01), Lander
patent: 5059186 (1991-10-01), Yamamoto et al.
patent: 5108380 (1992-04-01), Herlitze et al.

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