Pen-type injector
First Claim
1. A pen-type injector, comprising a housing;
- a cartridge containing medicinal product, the cartridge being retained within the housing;
means for selecting a dose of medicinal product to be expelled; and
means for expelling the selected dose of medicinal product;
characterised in that the housing comprises a unitary housing within which the means for selecting a dose of medicinal product to be expelled and the means for expelling the selected dose of medicinal product are moveably retained.
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Accused Products
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 cartridge containing medicinal product, the cartridge being retained within the housing, means for selecting a dose of medicinal product to be expelled, and means for expelling the selected dose of medicinal product. The housing may be a unitary housing within which the means for selecting a dose and the means for expelling the selected dose are moveably retained. Alternatively, the injector may include a housing, a piston rod, an insert located in the housing and through which the piston may rotate, ratchet means, a dose dial sleeve, a drive sleeve, a button located on the drive sleeve and rotatable with respect to the drive sleeve, and clutch means which upon depression of the button prevents rotation between the dose dial sleeve and the drive sleeve.
275 Citations
21 Claims
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1. A pen-type injector, comprising
a housing; -
a cartridge containing medicinal product, the cartridge being retained within the housing;
means for selecting a dose of medicinal product to be expelled; and
means for expelling the selected dose of medicinal product;
characterised in that the housing comprises a unitary housing within which the means for selecting a dose of medicinal product to be expelled and the means for expelling the selected dose of medicinal product are moveably retained.
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2. A pen-type injector, comprising:
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a housing;
a piston rod having a screw thread;
an insert located in the housing and through which the piston may rotate;
ratchet means associated with the insert to ensure the piston only rotates in a single direction through the insert;
a dose dial sleeve rotatable with respect to the housing and the insert;
a drive sleeve which is axially displaceable but not rotatable with respect to the piston rod;
a button located on the drive sleeve and rotatable with respect to the drive sleeve; and
clutch means which upon depression of the button prevents rotation between the dose dial sleeve and the drive sleeve. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A pen-type injector, comprising:
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a housing;
a piston rod having a screw thread;
an insert located in the housing and through which the piston may rotate;
a dose dial sleeve rotatable with respect to the housing and the insert; and
a drive sleeve which is axially displaceable with respect to the housing;
characterised in that a maximum angular displacement of the dose dial sleeve with respect to the housing is determined by abutment of a radially directed lug on the dose dial sleeve with a catch means on the insert. - View Dependent Claims (20, 21)
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Specification