Pen-Type Injector
AssigneeSanofi-Aventis Deutschland GmbH
InventorsRobert Frederick Veasey, Robert Perkins, David Aubrey Plumptre
Life of this patent
Estimating the term…
Abstract
The present invention relates to injectors, such as pen-type injectors, that provide for administration of medicinal products from a multidose-cartridge and permit a user to set the delivery dose. The injector may include a housing, a piston rod adapted to operate through the housing, a dose dial sleeve located between the housing and the piston rod, and a drive sleeve located between the dose dial sleeve and the piston rod. The dose dial sleeve may have a helical thread of first lead and the drive sleeve may have a helical groove of second lead. The first lead of the helical thread and the second lead of the helical groove may be the same.
Claims28
(canceled)
A pen type injector comprising:
- a housing;
- a piston rod adapted to operate through the housing;
- a clicker configured to generate audible feedback, the clicker comprising a first sleeve, the first sleeve comprising a flexible arm;
- and
- a second sleeve,
- wherein an end of the clicker comprises a plurality of circumferential teeth adapted to be coupled to a corresponding plurality of circumferential teeth of the second sleeve and adapted to prevent relative rotation between the first and second sleeves in a first rotational direction when the circumferential teeth of the first sleeve and the circumferential teeth of the second sleeve are coupled.
A pen type injector comprising:
- a housing;
- a piston rod disposed at least partially within the housing, the piston rod being moveable relative to the housing;
- a first sleeve disposed at least partially within the housing, the first sleeve comprising a flexible arm, an end of the first sleeve comprising circumferentially spaced teeth;
- a second sleeve disposed at least partially within the housing, the second sleeve comprising circumferentially spaced teeth configured to be coupled to the teeth of the first sleeve to prevent relative rotation between the first and second sleeves in a first rotational direction;
- and
- a splined surface comprising a plurality of splines, wherein the flexible arm of the first sleeve is configured to ride over the splines to generate audible feedback when the first sleeve and the splined surface are rotated relative to each other.
A pen type injector comprising:
- a housing;
- a piston rod disposed at least partially within the housing, the piston rod being moveable relative to the housing;
- a first sleeve disposed at least partially within the housing, the first sleeve comprising a flexible arm;
- a second sleeve configured to engage the first sleeve in a manner to prevent relative rotation between the first and second sleeves in a first rotational direction;
- and
- a splined surface comprising a plurality of splines, wherein the flexible arm of the first sleeve is configured to ride over the splines to generate audible feedback when the first sleeve and the splined surface are rotated relative to each other.
Dependencies are inferred from the claim text.