The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 1996
Filed:
Apr. 06, 1994
Applicant:
Inventor:
Michael W Freitas, Irving, TX (US);
Assignee:
Dexide, Inc., Fort Worth, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
606-1 ; 606198 ; 604105 ; 604164 ; 604174 ;
Abstract
A trocar assembly is disclosed for use in inserting a laparoscopic instrument into the abdominal cavity during surgery and includes a cylindrical member activated by intermeshing gears to expand a cylindrical member having a normally retracted outer diameter when the trocar assembly is within the abdominal cavity, to resist withdrawing movement of the assembly from the abdominal cavity.