Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-10583259-B2
Publication Date
2020-03-10
Expiration Date
Abstract
An injection device includes a housing and a setting part configured to, in relation to said housing, rotate in a first rotational direction when an amount of injection fluid to be dispensed is being set. The setting part rotates in a second rotational direction counter to the first rotational direction when the injection fluid is pressed out of the injection device. A latching unit defines at least one latching position of the setting part and acts between the setting part and the housing. The latching unit is active at least when the amount of injection fluid to be dispensed is set and each of the latching positions has an unequivocal rotational position of the setting part in relation to the housing assigned thereto.
Core Innovation
The invention relates to an injection device defining a longitudinal center axis, comprising a housing and a setting part configured to rotate in a first rotational direction when an amount of injection fluid to be dispensed is being set, and to rotate in a second rotational direction counter to the first rotational direction when the injection fluid is being pressed out of the injection device. A latching unit is provided between the setting part and the housing and defines at least one latching position, each latching position assigning an unequivocal rotational position of the setting part in relation to the housing.
The injection device defines a proximal direction and a distal direction, and the setting part is directly connected to the housing via a first threaded connection. In addition to rotating in the first rotational direction during setting, the setting part is configured to move in the distal direction, and in addition to rotating in the second rotational direction during pressing out, the setting part is configured to move in the proximal direction. The latching unit includes an axially displaceable latching part that is independent of the setting part in axial movement along the longitudinal center axis and rotationally fixed to the housing.
Further refinement describes a coupling between the setting part and an operating element, with first and second coupling positions defining rotationally fixed connection and relative rotation, respectively. The coupling positions are adjusted by proximal displacement of the operating element such that the operating element need not rotate during injection. The disclosed kinematics also include threaded connection between setting part, feed part, and dosing piston, together with a cartridge structure including a glass container, a plug, and a sealing disk pierced by an injection needle.
Claims Coverage
The relevant independent claim is clm-00001, defining an injection device with coordinated rotation of a setting part during dose setting and dose expelling, a latching unit with unequivocal rotational positions, and distal/proximal axial movement of the setting part via a first threaded connection.
Opposite rotation of setting part for setting and expelling
The setting part rotates in a first rotational direction when an amount of injection fluid to be dispensed is being set, and rotates in a second rotational direction counter to the first rotational direction when the injection fluid is being pressed out of the injection device.
Latching unit defining unequivocal rotational latching positions
A latching unit defines at least one latching position between the setting part and the housing; the latching unit is active at least when the amount of injection fluid to be dispensed is being set; each latching position has an unequivocal rotational position of the setting part in relation to the housing assigned thereto.
Coordinated distal/proximal axial movement with rotational movement via threaded connection
The setting part is directly connected to the housing via a first threaded connection and is configured to move in the distal direction in addition to rotating in the first rotational direction when the amount of injection fluid to be dispensed is being set, and to move in the proximal direction in addition to rotating in the second rotational direction when the injection fluid is being pressed out.
Independent claim clm-00001 is centered on a setting part that rotates in opposite directions for setting versus pressing out, combined with a latching unit that defines latching positions with an unequivocal rotational relationship to the housing, and a kinematic requirement that the setting part undergoes distal/proximal axial movement in addition to its rotational movement via a first threaded connection.
Stated Advantages
Documented Applications
No documented applications found
Interested in licensing this patent?