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:
Mar. 20, 1990
Filed:
Nov. 05, 1987
Tamer Akkas, Mission Viejo, CA (US);
Ted Carlson, Mission Viejo, CA (US);
The Cooper Companies, Inc., Menlo Park, CA (US);
Abstract
A surgical cutting instrument such as for use in intraocular surgery having a handpiece with an elongate probe extending foward from it. The probe has an elongate stationary outer cutter with a port at its tip and an elongate inner cutter with a cutting surface coaxially disposed therein. The interior of the inner cutter communicates with a vacuum source. A spring and diaphragm assembly in the handpiece and powered by a low pressure pump causes the inner cutter to rapidly reciprocate axially in the outer cutter, and body material, such as vitreous material, drawn in through the port by the vacuum source is thereby chopped by the cutting surface and aspirated out of the patient's body through the handpiece. A large adjustment nut on the handpiece allows the size of the port to be easily adjusted. Irrigation fluid can be provided at the surgical site through an infusion cap which is adjustable both longitudinally and rotatably on the handpiece.