Injector device with force lock-out and injection rate limiting mechanisms

摘要

An injectable substance delivery device comprising a pen device body, a cartridge, a plunger, a drive mechanism, and at least one of a lock-out mechanism and a rate-limiting mechanism. The lock-out mechanism is provided through a ratchet engagement between the body and the plunger to restrict plunger movement and to ensure that the required needle puncture depth is realized prior to injection by locking out the injection mechanism from advancing until a specified force is applied to the skin. A rate-limiting mechanism is also provided through a user compressed plunger drive spring to ensure that a specific rate of injection is realized during the injection of a medicament.

主权项

1. An injection device, comprising:
a main body extending between distal and proximal ends; an outer sleeve disposed about said main body, said outer sleeve having an inner bore and at least one ratchet arm, wherein said at least one ratchet arm protrudes toward said inner bore of said outer sleeve, and wherein said main body is slidably disposed within said inner bore of said outer sleeve; a plunger within said main body and said outer sleeve, and slidably engaged with said main body; a lock-out mechanism for engagement between said outer sleeve and said plunger to restrict a linear movement of said plunger until a specified force is applied to said main body; a rate-limiting mechanism for engagement between said outer sleeve and said plunger to control an advancement of said plunger; and a needle for penetrating a skin surface to inject a content.