Unit dose applicator

• US 4,398,909 A
• Filed: 12/31/1981
• Issued: 08/16/1983
• Est. Priority Date: 12/31/1981
• Status: Expired due to Fees

• Current Assignee: Merck & Co., Inc.
• Original Assignee: Merck & Co., Inc.
• Inventors: Portnoff, Joel B.
• Primary Examiner(s): YASKO JR, JOHN D
• Application Number:
  US06/336,223
• Time in Patent Office: 593 Days
• Field of Search: 128/233, 128/232, 128/261, 604/294, 604/295, 604/298, 604/289, 604/19
• US Class Current: 604/295
• CPC Class Codes: A61F 9/0008 Introducing ophthalmic products into the ocular cavity or retaining products therein putting in contact lenses A61F9/0061; introducing or retaining media in cavities of the body in general A61M31/00

Abstract

A unit dose applicator for liquid ophthalmic medicaments in solution or suspension has an elongated housing for the medicament; at one end of the housing there is an opening for at least partially emptying the contents of the housing; at the other end of the housing is a second opening; and the second opening is capped by a diaphragm-like seal having a sufficient displacement potential to exude only 1 to 4 drops of the medicament.

Claims

1. A unit dose applicator for the delivery of an ophthalmic medicament to the eye comprising an elongated housing having a first and second end;

at the first end a nozzle having at the distal end thereof an opening, at the opposite end of the housing cap, said cap in sealing engagement with the opening and having sidewalls and an end wall, the sidewalls essentially in parallel alignment with the sidewalls of the housing at proximal end and said end wall spaced from the proximal end of the housing so that the end wall and sidewalls define a headspace, and the end wall deformable so that upon deformation inward toward the proximal end, said end wall intrudes into the headspace to displace from 1 to 6 drops from the distal end of the housing, and wherein the housing contains a medicament, said medicament adjacent the opening at the distal end and intermediate the medicament and opening at the proximal end of the housing is an impeller fluid that is inert to and immicible with the medicament.