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1. WO2017001693 - A PISTON WASHER FOR A DRUG DELIVERY DEVICE AND DRUG DELIVERY DEVICE INCORPORATING SUCH PISTON WASHER

Publication Number WO/2017/001693
Publication Date 05.01.2017
International Application No. PCT/EP2016/065620
International Filing Date 01.07.2016
IPC
A61M 5/31 2006.1
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm rests
178Syringes
31Details
A61M 5/315 2006.1
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm rests
178Syringes
31Details
315Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod; Appliances on the rod for facilitating dosing
A61M 5/24 2006.1
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm rests
178Syringes
24Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or cartridges, e.g. automatic
CPC
A61M 2207/00
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
2207Methods of manufacture, assembly or production
A61M 5/2033
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
178Syringes
20Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
2033Spring-loaded one-shot injectors with or without automatic needle insertion
A61M 5/24
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
178Syringes
24Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
A61M 5/3146
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
178Syringes
31Details
3146Priming, e.g. purging, reducing backlash or clearance
A61M 5/31515
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
178Syringes
31Details
315Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod ; or piston; Appliances on the rod for facilitating dosing ; ; Dosing mechanisms
31511Piston or piston-rod constructions, e.g. connection of piston with piston-rod
31515Connection of piston with piston rod
A61M 5/31541
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
5Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
178Syringes
31Details
315Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod ; or piston; Appliances on the rod for facilitating dosing ; ; Dosing mechanisms
31533Dosing mechanisms, i.e. setting a dose
31535Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
31541Means preventing setting of a dose beyond the amount remaining in the cartridge
Applicants
  • NOVO NORDISK A/S [DK]/[DK]
Inventors
  • BENGTSSON, Henrik
  • CARROLL, Ronan
  • STEENFELDT-JENSEN, Søren
  • GRÅSKOV, Henning
  • PREUTHUN, Jan Harald
  • SPORK, Emil Gram
Priority Data
15174922.301.07.2015EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A PISTON WASHER FOR A DRUG DELIVERY DEVICE AND DRUG DELIVERY DEVICE INCORPORATING SUCH PISTON WASHER
(FR) RONDELLE DE PISTON POUR DISPOSITIF D'ADMINISTRATION DE MÉDICAMENT ET DISPOSITIF D'ADMINISTRATION DE MÉDICAMENT INCORPORANT UNE TELLE RONDELLE DE PISTON
Abstract
(EN) The present invention relates to a piston washer (109, 209) for use in a drug delivery device for transferring a distally directed axial force from a piston rod (107, 207) towards a piston (199, 299) of a held cartridge (189, 289). The piston washer (109, 209) defines a proximal surface portion (109a) adapted for engagement with the distal portion of a piston rod (107, 207) and a distal surface portion (109b) configured to engage and abut a piston (199, 299). An axial distance defining device (19a1, 109b1, 109c, 209c) is positioned between the proximal surface portion (109a) and the distal surface portion (109b), wherein the axial distance defining device (19a1, 109b1, 109c, 209c) is configured to be shifted from a first axial compressible state into a second axial non-compressible state. The invention further relates to a drug delivery device incorporating such piston washer (109, 209).
(FR) La présente invention concerne une rondelle (109, 209) de piston destinée à être utilisée dans un dispositif d'administration de médicament permettant de transférer une force axiale dirigée distalement à partir d'une tige (107, 207) de piston vers un piston (199, 299) d'une cartouche (189, 289) maintenue en place. La rondelle (109, 209) de piston définit une partie de surface proximale (109a) conçue pour venir en contact avec la partie distale d'une tige (107, 207) de piston et une partie de surface distale (109b) conçue pour venir en contact avec un piston (199, 299) et venir en butée contre celui-ci. Un dispositif (19a1, 109b1, 109c, 209c) définissant une distance axiale est positionné entre la partie de surface proximale (109a) et la partie de surface distale (109b), ledit dispositif (19a1, 109b1, 109c, 209c) définissant une distance axiale étant conçu pour passer d'un premier état compressible axial à un second état non compressible axial. L'invention concerne en outre un dispositif d'administration de médicament incorporant une telle rondelle (109, 209) de piston.
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