The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 2022
Filed:
May. 15, 2017
Amgen Inc., Thousand Oaks, CA (US);
Sean Fitzgibbon, Camarillo, CA (US);
Julian Jazayeri, Woodland Hills, CA (US);
AMGEN INC., Thousand Oaks, CA (US);
Abstract
A drug delivery device includes a reservoir, a drug delivery member in fluid communication with the reservoir, and a plunger disposed in and moveable relative to the reservoir. A plunger rod has a mass Mand is movable from (i) a first position, where the distal end of the plunger rod is spaced apart from the plunger to (ii) a second position, where the distal end of the plunger rod contacts the plunger. A drive mechanism is coupled to the proximal end of the plunger rod and is configured to deliver a drive force Fto move the plunger rod from the first position to the second position. A ratio of the mass of the plunger rod to the drive force of the drive mechanism (M/F) is in a range of approximately a value greater than 0 kg/kgf to approximately 0.05 kg/kgf.