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:
Jul. 22, 1997
Filed:
May. 06, 1996
Jacques R St Louis, Rockland, Ontario, CA;
Other;
Abstract
A suction cup for a contact lens holding device in which an inner curved surface of the cup has an outer continuous wall and a projection arrangement between the continuous and a centrally located aperture provided for air suction purposes. The projection arrangement is disposed to allow for air to be withdrawn through the aperture while providing a support for a lens as suction is applied. This cup, particularly for use with soft lenses, holds the lenses in position under suction without tending to draw the lenses at their centres into the aperture which would destroy suction. The projection arrangement may be a single wall. e.g. a spiral or a plurality of projections arranged in a particular manner for supporting the lens. The invention also includes a contact lens holding device having such a suction cup and a mouthpiece is preferably provided for the user to apply suction by insertion into his mouth.