Device for inserting and removing contact lenses

Details Device for inserting and removing contact lenses Device for inserting and removing contact lenses

1977-07-14

1978-06-27

Cherry, Johnny D.

Handling: hand and hoist-line implements

Contact lens applicator

294 64R, A61F 900

Patent

active

040970817

ABSTRACT:
An elongated resilient cylindrical body of small diameter has at its forward end a contact lens holding suction cup. A small diameter axial duct extends entirely through the body. The duct is open at its forward end at the central portion of the cup and at its opposite end at the distal end of the body. The body has a tapered portion which is of progressively decreasing diameter from a location near the distal end of the body to the distal end. The distal end of the body thus presents rearwardly a relatively small annular contact sealing area surrounding the rear end of the duct. The tapered portion is related to the diameters of the body and duct, and to the resilience of the body, so that, with the body held between the thumb and one finger of the user's hand, the tapered portion can be squeezed lightly radially therebetween, while another finger of the hand covers and closes the rear end of the duct, thereby compressing the tapered portion to a degree sufficient to reduce the volumetric capacity of the duct and thereby retain to a greater degree the holding force of the cup.

REFERENCES:
patent: 2384334 (1945-09-01), Olson
patent: 3091328 (1963-05-01), Leonardos
patent: 3129971 (1964-04-01), Kobler
patent: 3647380 (1972-03-01), Middleton
patent: 3791689 (1974-02-01), Boone et al.
patent: 3934914 (1976-01-01), Carruthers

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