초록 ▼

A pharmaceutical dispenser includes a housing (4), containing two pharmaceutical cartridges (32,34), slidably mounted to a sliding body (100). A replaceable needle manifold assembly (10) is mounted to the housing and fluidly couples the cartridges with a hypodermic needle at a common exit. The slidi

A pharmaceutical dispenser includes a housing (4), containing two pharmaceutical cartridges (32,34), slidably mounted to a sliding body (100). A replaceable needle manifold assembly (10) is mounted to the housing and fluidly couples the cartridges with a hypodermic needle at a common exit. The sliding body is part of a reciprocating drive assembly used to drive a pair of drive stems (88) against the pistons (96, 98) of the cartridges, thus forcing predetermined amounts of the pharmaceuticals out the needle. The movement of the sliding body between retracted and post-injection positions remains constant. However, the amounts and proportions of the pharmaceuticals injected during the delivery stroke is chosen by the user using stroke adjusters (182) carried by the sliding body. A bistable status flag (186) is mounted to the sliding body to indicate when the sliding body is in the post-injection and the retracted positions. The dosage adjustments are made when the sliding body is in the post-injection position. If a dose selected is more than is available, the sliding body is prevented from moving to the retracted position so that the status flag is not tripped.

대표청구항 ▼

A fluid dispenser comprising: a housing; at least first and second variable volume containers mounted to the housing and including first and second exits and first and second movable elements by which the contents of the first and second containers can be forced through said first and second exits a

A fluid dispenser comprising: a housing; at least first and second variable volume containers mounted to the housing and including first and second exits and first and second movable elements by which the contents of the first and second containers can be forced through said first and second exits as the first and second movable elements are moved within said first and second containers respectively; a common exit fluidly coupled to the first and second exits; first and second drive stems drivingly coupled to the first and second movable elements, the first and second drive stems including axially extending drive surfaces; and a drive assembly, movable from a retracted position to a post-injection position for driving the first and second drive stems so to drive the first and second movable elements within said first and second containers in a cyclic manner, the drive assembly including: first and second drivers, including one-way drive elements, drivingly coupled to the first and second drive stems along the drive surfaces by the one-way drive elements; and first and second stroke adjusters for adjusting the relative distances the first and second drivers and the first and second drive stems associated therewith travel during each cycle of the driver so the amounts and proportions of the contents of the first and second containers forced through the first and second exists during each of one or more cycles of the drive assembly can be selected by the user while said amounts and proportions remain the same unless said relative distances are changed.