Variable proportion dispenser

Dispensing – Plural sources – compartment – containers and/or spaced jacket – With discharge assistant for each source

Patent

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Details

222145, 222309, 222327, 604 82, 604186, 604191, A61N 500

Patent

active

052401464

ABSTRACT:
A variable proportion dispenser (2) includes a housing (4) which houses two pharmaceutical cartridges (6, 7). A reciprocating drive assembly (10) includes a drive stem (36, 37) extending from the piston (46) of each cartridge, a sliding body (66) mounted to the housing, and two one-way drive devices (54, 55) carried by the sliding body. Each one-way drive device includes a threaded dosage adjuster (60 6I), and a reciprocating, one-way driver (58, 59) which drives the drive stem into the cartridge. The distance the reciprocating driver can move on the return stroke away from the cartridge is adjustable by changing the threaded position of the dosage adjuster within the sliding body to change if and when the opposed ends (98, 96) of the dosage adjuster and reciprocating driver disengage during the return stroke. During the next delivery stroke, the separated opposed ends (98, 96) do not contact for an initial portion of the stroke. The user can thus control the amount and proportion of each pharmaceutical dispensed during each delivery stroke for each dispensing cycle.

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