11-03-2021 дата публикации
Номер: US20210069417A1
Принадлежит:
Intervet Inc.
A device for administering a fluid is provided, with 1. A device for administering a fluid , comprising{'b': 16', '116', '17, 'a cylinder (, ) which has an open dispensing end (),'}{'b': 36', '16', '116', '35', '16', '116', '17', '10, 'a piston () which is displaceable between a front and rear end position in the cylinder (, ) and is connected to a plunger rod () that protrudes along a first direction beyond a rear end of the cylinder (, ) opposite the open dispensing end () and is guided in a receiving block (),'}{'b': 18', '17, 'a nonreturn valve () closing the open dispensing end (), and'}{'b': 35', '135', '10, 'a tension device (S) which is connected to the piston rod (, ) and is arranged in the receiving block (),'}{'b': 36', '35', '135', '36', '16', '116', '35', '135', '17, 'wherein the tensioning device (S), when the piston () is in its front end position, can move the piston rod (, ) in a tensioning operation along the first direction until the piston () is in its rear end position in order thereby to fill the cylinder (, ) with the fluid to be administered and in order to pretension the piston rod (, ) toward the open dispensing end (), and'}{'b': 36', '35', '135', '36', '16', '116', '18, 'wherein the tensioning device (S), when the piston () is in its rear end position, can release the piston rod (, ) in a dispensing operation, and therefore the piston () moves counter to the first direction as far as its front end position because of the applied pretension and, in the process, fluid in the cylinder (, ) is dispensed via the nonreturn valve () for administering,'}{'b': 52', '12', '53, 'the tensioning device (S) has a ramp () which is rotatable by means of a motor () and has a ramp track () extending along a helical line,'}{'b': 53', '1', '2', '46, 'wherein the ramp track () ascends from a first plateau along a region of inclination (S, S) to a second plateau and descends from the second plateau to the first plateau via a transition flank (),'}{'b': 51', ' ...
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