SPINDLE FOR A DRUG DELIVERY DEVICE
First Claim
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1. A spindle for driving a bung of a cartridge, said spindle comprising:
- a generally circular shaft having an outer surface, said generally circular shaft extending from a distal end to a proximal end of said circular shaft;
a first helical groove provided along a first portion of said outer surface of said generally circular shaft, said first helical groove having a first pitch; and
a second helical groove provided along a second portion of said outer surface of said generally circular shaft, said second helical groove overlapping said first helical groove, said second helical groove having a second pitch.
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Abstract
A spindle for driving a bung of a cartridge. The spindle includes a generally circular shaft having an outer surface. The generally circular shaft extends from a distal end to a proximal end of said circular shaft. A first helical groove is provided along a first portion of the outer surface. The first helical groove having a first pitch. A second helical groove provided along a second portion of the outer surface of the generally circular shaft. The second helical groove overlapping the first helical groove. The second helical groove having a second pitch.
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Citations
29 Claims
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1. A spindle for driving a bung of a cartridge, said spindle comprising:
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a generally circular shaft having an outer surface, said generally circular shaft extending from a distal end to a proximal end of said circular shaft; a first helical groove provided along a first portion of said outer surface of said generally circular shaft, said first helical groove having a first pitch; and a second helical groove provided along a second portion of said outer surface of said generally circular shaft, said second helical groove overlapping said first helical groove, said second helical groove having a second pitch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A dose setting mechanism for use with a drug delivery device, said mechanism comprising:
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an housing; a rotating sleeve in rotatable engagement with respect to said housing; a driver releasably coupled to said rotating sleeve; and a spindle having two overlapping helical grooves, said spindle operatively coupled to said driver; such that when a user sets a dose by rotating said rotating sleeve, said driver also rotates. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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Specification