Injector device with force lock-out and injection rate limiting mechanisms
First Claim
Patent Images
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.
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Accused Products
Abstract
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.
88 Citations
49 Claims
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1. An injection device, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An injection device, comprising:
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a main body extending between distal and proximal ends; an outer sleeve disposed about said main body, the 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; and a needle for penetrating a skin surface to inject a content. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method for injecting medication in an injection device, comprising the steps of:
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dialing in a desired measure dosage of medication in the injection device; securing a plunger of the injection device for injecting medication using ratchet arms of an outer sleeve and preventing release of said plunger and injection until a specified force is applied by an injection needle and needle stop of a main body of said injection device against a skin surface; slidably interposing said main body between said plunger and said outer sleeve to disengage said ratchet arms and thereby release said plunger and actuate an injection in response to said specified force being applied by the injection needle and needle stop against said skin surface and implementing an injection; and limiting a rate of injection of said desired measure dosage of medication using a spring force between said plunger and said outer sleeve once said specified force is applied against said skin surface. - View Dependent Claims (25, 26)
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27. An injection device, comprising:
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a main body extending between distal and proximal ends; an outer sleeve disposed about said main body and having an inner bore and at least one ratchet arm, wherein said at least one ratchet arm is disposed within said outer sleeve and protrudes into 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; wherein said ratchet arm is configured to engage said plunger to restrict a linear movement of said plunger until a specified force is applied to said main body; a first spring 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. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. An injection device, comprising:
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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; and a needle for penetrating a skin surface to inject a content; wherein said ratchet arm is configured to engage said plunger to restrict a linear movement of said plunger until a specified force is applied to said main body. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49)
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Specification