Firing button for automatic injection device
First Claim
1. An automatic injection device having a proximal end configured to deliver a dose of a therapeutic agent and a distal end configured to be controllable by a user, the automatic injection device comprising:
- a firing body provided at the distal end of the automatic injection device, the firing body comprising;
a hollow tubular member having a bore, anda radial surface extending inwardly from a distal portion of the hollow tubular member;
a plunger having a first and second longitudinally extending plunger arm, each plunger arm terminating in a respective, first radially extending plunger foot and a second radially extending plunger foot, the plunger arms extending through the bore of the hollow tubular member of the firing body, and the first and second plunger foot seated on the radial surface of the firing body, the first plunger foot of the first plunger arm has a first conical surface and a second conical surface, and the second plunger foot of the second plunger arm has a first conical surface and a second conical surface, wherein a first contact surface of the plunger is defined by the first conical surface of the first plunger foot and the first conical surface of the second plunger foot, and wherein a second contact surface of the plunger is defined by the second conical surface of the first plunger foot and the second conical surface of the second plunger foot; and
a firing button provided at the distal end of the automatic injection device, the firing button comprising;
an inner ring having an inner diameter of between 6.0 mm and 6.7 mm provided in proximity to the plunger foot, the inner ring configured to contact the plunger foot and to disengage the plunger foot from the radial surface of the firing body to allow the plunger to move through the bore of the hollow tubular member of the firing body, when the firing button is activated by the user.
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Accused Products
Abstract
Exemplary embodiments provide firing mechanism assemblies that minimize or eliminate a misfire of an automatic injection device that causes a delay in the delivery of an injection. Exemplary embodiments provide automatic injection devices including firing mechanism assemblies that minimize or eliminate a misfire that causes a delay in the delivery of an injection. Exemplary embodiments provide methods for minimizing or eliminating misfire that causes a delay in delivery of an injection in automatic injection devices. Exemplary embodiments provide methods for using automatic injection devices that are free of a misfire that causes delay in delivery of a therapeutic substance into a patient'"'"'s body.
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Citations
35 Claims
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1. An automatic injection device having a proximal end configured to deliver a dose of a therapeutic agent and a distal end configured to be controllable by a user, the automatic injection device comprising:
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a firing body provided at the distal end of the automatic injection device, the firing body comprising; a hollow tubular member having a bore, and a radial surface extending inwardly from a distal portion of the hollow tubular member; a plunger having a first and second longitudinally extending plunger arm, each plunger arm terminating in a respective, first radially extending plunger foot and a second radially extending plunger foot, the plunger arms extending through the bore of the hollow tubular member of the firing body, and the first and second plunger foot seated on the radial surface of the firing body, the first plunger foot of the first plunger arm has a first conical surface and a second conical surface, and the second plunger foot of the second plunger arm has a first conical surface and a second conical surface, wherein a first contact surface of the plunger is defined by the first conical surface of the first plunger foot and the first conical surface of the second plunger foot, and wherein a second contact surface of the plunger is defined by the second conical surface of the first plunger foot and the second conical surface of the second plunger foot; and a firing button provided at the distal end of the automatic injection device, the firing button comprising; an inner ring having an inner diameter of between 6.0 mm and 6.7 mm provided in proximity to the plunger foot, the inner ring configured to contact the plunger foot and to disengage the plunger foot from the radial surface of the firing body to allow the plunger to move through the bore of the hollow tubular member of the firing body, when the firing button is activated by the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification