INJECTION DEVICE WITH A TWO-WAY SLIP COUPLING
First Claim
1. An injection device for injecting a substance, the device comprising:
- a casing comprising a reservoir for the substance;
an operating button for selecting a dosage of the substance to be injected, said button moveable relative to the casing in a first movement and a second movement;
a slip coupling comprising co-operating latching elements engageable with each other and coupling the operating button to the casing in discrete latching positions during the movements of the button; and
a spring member which opposes the movement of the operating button in at least one of the movements;
wherein one of the latching elements is shaped such that when the elements are engaged, there is a lower resistance to movement of the button in one of the movements than in the other movement.
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0 Petitions
Accused Products
Abstract
An injection device including casing with a reservoir for an injectable product, an operating button which can be moved relative to the casing in a dosing direction which increases the dosage and in a correcting direction to set a product dosage, a conveying member for delivering the dosage set, a slip coupling comprising a latching element and a co-operating latching element which latch to each other in a latching engagement and couple the operating button to the casing in a positive and non-positive fit in discrete latching positions during a movement in the dosing direction or the correcting direction, and a spring member which opposes the movement of the operating button in at least one of the directions with a spring force, wherein the latching element or co-operating latching element are shaped such that in the latching engagement they offer a lower resistance to the movement in the at least one of the directions than to the movement in the other direction.
66 Citations
29 Claims
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1. An injection device for injecting a substance, the device comprising:
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a casing comprising a reservoir for the substance; an operating button for selecting a dosage of the substance to be injected, said button moveable relative to the casing in a first movement and a second movement; a slip coupling comprising co-operating latching elements engageable with each other and coupling the operating button to the casing in discrete latching positions during the movements of the button; and a spring member which opposes the movement of the operating button in at least one of the movements;
wherein one of the latching elements is shaped such that when the elements are engaged, there is a lower resistance to movement of the button in one of the movements than in the other movement. - View Dependent Claims (7)
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2. An injection device, comprising:
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a) a casing with a reservoir for an injectable product; b) an operating button for setting a product dosage which can be moved relative to the casing in a dosing direction which increases the dosage and in a correcting direction; c) a conveying member for delivering the dosage set; d) a slip coupling comprising a latching element and a co-operating latching element which latch to each other in a latching engagement and couple the operating button to the casing in a positive and non-positive fit in discrete latching positions during a movement in the dosing direction or the correcting direction; and e) a spring member which opposes the movement of the operating button in at least one of the directions;
whereinf) the latching element or co-operating latching element are shaped such that in the latching engagement, they offer a lower resistance to the movement in one of the directions than to the movement in the other direction. - View Dependent Claims (3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification