US 6,524,280 B2 · Dose setting limiter

Abstract

Described is a dose setting limiter for medical injectors of the type having a housing accommodating an ampoule-containing medicine sufficient for a number of dosed injections, a rotary dose setting knob, which is rotational relative to the housing and by which doses may be set by rotating the dose setting knob and an injection button which, when activated, administers the set dose. The dose setting limiter includes a stationary first part connected to the housing, and a second part fitted over the rotary dose setting knob, the second part being able to rotate together with the dose setting knob when setting up a dose and the second part being rotational relative to the first part. A third part is placed between the first part and the second part, the third part having means cooperating with means on the second part for limiting the dose setting.

Claims16

Dependent claims

A dose setting limiter for a medical injector, the dose setting limiter comprising:

three circular parts:
a shell-shaped first part;
a second part;
and a third part;
the three parts being coaxially assembled and sharing a common center axis;
wherein:
the shell-shaped first part has a circular upper surface and is connectable to the injector;
the second circular part is rotatable for setting up a dose and has a periphery from which a protrusion extends radially;
the third part:
is shaped as a flat ring sandwiched between the first and second part;
is rotatable about the common centre axis with respect to the first part when the dose setting limiter is disconnected from the injector but rotationally locked to the first part when the first part is connected to the injector,
further comprises another protrusion that cooperates with the protrusion located on the second part for limiting the angular rotation of the second part relative to the third part when the second part is rotated to set up a dose.

9 more elements

Dependencies are inferred from the claim text.

Dose setting limiter

Life of this patent

Dose setting limiter

Life of this patent

Abstract

Claims16