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:
Jan. 10, 1989
Filed:
Jul. 20, 1987
Gary N Krasner, Irvine, CA (US);
John W Berkman, Costa Mesa, CA (US);
The Cooper Companies, Inc., Menlo Park, CA (US);
Abstract
A corneal vacuum trephine system including a suction ring having an annular suction ring surface configured to define a suction annular space positionable against the eye. A vacuum device creates a vacuum in the suction annular space to secure the suction ring to the eye over the cornea. A trephine having a cutting edge is positionable so as to be movable relative to the suction ring for making with its cutting edge a circular cut in the cornea. A trephine guide is positionable on the suction ring for subsequently guiding the trephine therethrough and relative to the cornea. The guide permits the trephine to be separated from the suction ring after cutting the cornea when the suction ring is secured to the eye so that the cut in the cornea can be examined and the trephine positioned again in the suction ring precisely in the same place and orientation in the incomplete cornea cut to deepen the cut. The guide is also removable off of the suction ring when the ring is secured to the eye providing a large viewing area of the cornea through the bore of the suction ring. The guide and ring are configured to define a space therebetween through which the corneal cut made by the trephine and the cutting edge thereof can be seen with the ring in place on the eye and the trephine in the ring.