Mold for an intraocular/contact lens
US5071101A · kind A · utility
Inventor
Key dates
| Filing date | Mar 26, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Mar 26, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/17017
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A casting mold for use in the manufacture of intraocular/contact lenses. The casting mold comprises a base and a cup-like feature attached to the base. The base has a frusto-conical configuration defined by a first planar circular cross-sectional area taken adjacent to the cup-like feature and a second planar circular cross-sectional area taken at a distance remote from the cup-like feature. The circumferences of the first and second cross-sectional areas respectively form lips. The first cross-sectional area is substantially less than the second cross-sectional area, and the portion of the base defining its side walls extends between the respective lips of the first and second cross-sectional areas and lies substantially within the generatrix of a line connecting the respective lips of the first and second cross-sectional areas rotated about the axis connecting the centers of the first and second cross-sectional areas. A segment of the base along a chord cutting the circumference of the base has been removed. The defined configuration of the casting mold facilitates location of the mold in a collet of a lens generating lathe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.