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:
Apr. 29, 1980
Filed:
Oct. 11, 1977
Nicholas G Douvas, Port Huron, MI (US);
Henry T Dinkelkamp, Mt. Prospect, IL (US);
Other;
Abstract
A fixed arc cyclic cutter-extractor and handpiece assembly for use in ophthalmic microsurgery incorporates a tubular cutter tip having a closed outer end and a lateral orifice therethrough in close proximity to the end. The periphery of the orifice defines a cutting edge for cooperation with a cutter blade component which is of segmental cross section and is oscillatable therewithin throughout an angular path of travel which carries it between two extreme positions, in one of which positions it closes the orifice, to complete a shearing action and in the other of which the orifice is open. The cutter blade is formed as an anterior continuation of, and driven by, a combined driving and extraction tube fitted within said tubular cutter tip. An infusion tube concentrically surrounds the tubular cutter tip in the area posterior to the cutting orifice. The integral cutter blade-driving-extraction tube component is driven by a low voltage D.C. electric motor alternately energized in opposite directions and controlled in such manner as to end each cutting cycle with the blade in an open position.