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:
May. 17, 1994
Filed:
Jan. 16, 1992
Applicant:
Inventor:
Michael W Freitas, Irving, TX (US);
Assignee:
Dexide, Inc., Fort Worth, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
604249 ;
Abstract
A positive touch surgical endoscopic cannula assembly in which one, or both, of liquid or gas may be introduced or removed from a body cavity during surgery. The device contains a valving mechanism responsive to finger or thumb touch of the surgeon and having a conically shaped force resistor which is partially inverted during movement of the valve between open and closed positions. The partial inversion of the flexible resistor is detectable through an actuator to the hand or thumb of the operator to positively indicate positioning of the valve head and seat members.