Injection device
OwnerHerbert Bechtold, Jochen Gabrielinventors
Life of this patent
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Abstract
The invention relates to an injection device (10) having a housing (15) and an injector fluid container (12) whicj can move, in relation to this housing, between a distal and proximal end position, and also having a pushrod (14) to act on a plunger 923) in this container (12) for the purpose of expelling fluid from the container. A device connection (27) is provided between the pushrod (14) and the container, this drive connection is effective in both the proximal end position of the container (12), it is only effective when the pushrod (14) is moved in the distal direction.
Claims47
An injection device comprising a housing (15;
- 132, 150) and a container (12;
- 136) for an injection fluid or a retainer (134, 234) for a container of this kind, which is displaceable in relation to this housing between a distal end position (FIGS. 2, 3, 9, 21) and a proximal end position (FIGS. 1, 4, 5, 8, 11, 19, 20), further comprising a pushrod (14;
- 188) movable relative to the housing to expel fluid from such a container (12;
- 136), and comprising a first connecting device (27;
- 112, 114;
- 242, 244, 246, 248), which is position-dependent and/or direction-dependent, between the pushrod (14;
- 188) and the container (12;
- 136).
The injection device according to one or more of the preceding claims, wherein the first connecting device comprises a member (27;
- 112;
- 242, 244) that is connected to the container (12;
- 136) and formed to engage with the pushrod (14;
- 188).
The injection device according to one or more of the preceding claims, wherein the second connecting device comprises a member (38;
- 112;
- 186) provided on the drive mechanism (35;
- 186), which member is formed to engage with the pushrod (14;
- 188) and which, at least in the distal end position range of the container (12;
- 136), engages elastically with the pushrod (14;
- 188).
The injection device according to one or more of the preceding claims, wherein, at least in areas, the pushrod (14;
- 188) is formed in the form of a toothed rod (FIGS. 10;
- 30, 31).
The injection device according to one or more of the preceding claims, wherein the pushrod (14;
- 188) is associated with a stop (91) limiting the movement of the pushrod relative to the housing (15;
- 132), at least in the proximal direction.
The injection device according to one or more of the preceding claims, wherein the container (12;
- 136) is associated with a retainer (17;
- 54;
- 134, 234) which holds the container (12;
- 136) and can move axially in the housing (15;
- 132) between a proximal and a distal end position.
The injection device according to one or more of the preceding claims, wherein the effectiveness of the first and/or second connecting device (27;
- 38;
- 112, 114;
- 122, 124;
- 242, 244, 246, 248, 214, 216, 218, 220) is a function of the respective position of the container (12;
- 136).
An injection device having a housing (15;
- 132, 150), comprising an injection fluid container (12;
- 136) disposed in this housing (15), further comprising a pushrod (14;
- 188) movable in relation to the housing (15;
- 132, 150) to expel fluid from this container (12;
- 136), further comprising a retainer (54;
- 134, 234) serving to hold the container (12;
- 136) and movable in the housing (15;
- 132) between a proximal and a distal end position, and comprising a device (64;
- 236, 240) for adjusting the length of this retainer (54;
- 134, 234).
The injection device according to one or more of the preceding claims, wherein the housing has at least two parts, and a device (144) is provided for changing the relative position of housing parts (132, 150), in particular by linearly moving them relative to each other.
The injection device according to one or more of the preceding claims, wherein the first connecting device (186) comprises two engaging members (214, 216) that are provided with engaging elements (214′, 216′) adapted to engage in corresponding rows of teeth (218, 220) of a toothed rod (188) that serves as a pushrod.
The injection device according to one or more of the preceding claims, wherein the second connecting device has two engaging members (242, 244) that are provided with engaging elements (242′, 244′) adapted to engage in corresponding rows of teeth (246, 248) on a toothed rod (188) that serves as a pushrod.
An injection device having a housing (132, 150) for receiving a container (136) for a fluid to be injected, and having a toothed rod that is movable by means of an actuating member to expel fluid from such a container (136) disposed in the housing, which toothed rod (188), viewed in cross section, is polygonal and on a plurality of sides of this polygon, is respectively provided with a row of teeth (218, 220, 246, 248), said rows of teeth cooperating with another member, in particular the actuating member, that cooperates with the toothed rod (188), said another member having a plurality of engaging members (214, 216), each provided with at least one engaging element (214′, 216′) that is complementary to the associated row of teeth and elastically engages therewith, one engaging member out of this plurality of engaging members (214, 216) engaging fully with the associated row of teeth (218, 220) via its at least one complementary engaging element (214′, 216′), and other engaging members out of this plurality of engaging members being not in full engagement with their associated row of teeth.
Dependencies are inferred from the claim text.