Liquid dispensing apparatus

Details Liquid dispensing apparatus Liquid dispensing apparatus

1984-03-08

1986-11-18

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material applied to or removed from external...

222390, A61M 3500

Patent

active

046233377

ABSTRACT:
An apparatus (10) for the repetitive dispensing of a predetermined quantity of eyedrops (12) has a cylinder (14) with a restricted opening (18) at a first end (16). A plunger (20) attached to rod (23) extends into the cylinder (14) from end (22). Biasing member (28) has a ramped cam surface (32) incorporating a pair of steps (46), actuating member (26) has an opposed surface (30) with a projection (44) which rides on ramped cam surface (32) and drops off step (46) when actuating member (26) is rotated. Rotation of the actuating member (26) also advances the actuating member (26) on threaded member (24). Spring (42) biases surfaces (30) and (32) together. A projection (44) drops over each step (46), plunger (20) is moved incrementally toward end (16) of cylinder (14) to discharge eyedrops (12) through opening (18 ). A disposable cartridge (50) may be substituted for the cylinder (14).

REFERENCES:
patent: 3162217 (1964-12-01), Poli, Jr. et al.
patent: 4013370 (1977-03-01), Gingras
patent: 4498904 (1985-02-01), Turner et al.
patent: 4531944 (1985-07-01), Bechtle

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