Medication delivery pen cap actuated dose delivery clutch
First Claim
Patent Images
1. A medication delivery pen comprising:
- a cap;
a medication-containing cartridge assembly having a distal end for receiving said cap of said medication delivery pen and an open proximal end having an array of threads, said medication-containing cartridge assembly further including;
a cartridge having a pierceably sealed distal end, anda plunger in sliding fluid tight engagement within the cartridge at a location distally of said array of threads; and
a pen body assembly releasably mountable on said medication-containing cartridge assembly of said medication delivery pen for moving said plunger in said cartridge, said pen body assembly having;
a housing surrounding said pen body assembly and having opposed proximal and distal ends, said distal end having an array of threads dimensioned and having a pitch for threaded engagement with said array of threads at said proximal end of said medication-containing cartridge assembly,a lead screw having a proximal end disposed in said housing, a distal end projecting beyond said distal end of said housing for selective engagement with said plunger, and an array of threads extending between said proximal and distal ends of said lead screw and defining a pitch substantially equal to said pitch of said array of threads at said distal end of said pen body assembly,driver means in said pen body assembly for moving said lead screw distally in said pen body assembly selected amounts,dose setting means for defining specified distances of distal travel for defining specified distances of distal travel for said lead screw corresponding to selected doses of medication to be delivered and causing said driver means to move said lead screw and said plunger in said cartridge distally a defined specified distance corresponding to a selected dose, andclutch means in said pen body assembly for disconnecting said dose setting means from said lead screw when said cap is mounted on said pen body assembly and connecting said dose means to said lead screw means when said cap is not mounted on said pen body assembly.
1 Assignment
0 Petitions
Accused Products
Abstract
A medication delivery pen is provided having a medication cartridge assembly, a pen body assembly and a cap. The pen body assembly includes a dose setting mechanism and a dose delivery mechanism that are selectively disconnected and connected by attaching and removing, respectively, the cap of the medication delivery pen. When the cap is attached to the medication delivery pen the user can easily dial in and correct the dialed in dosage and when the cap is removed the medication delivery pen is ready to dispense the dialed in dosage.
-
Citations
9 Claims
-
1. A medication delivery pen comprising:
-
a cap; a medication-containing cartridge assembly having a distal end for receiving said cap of said medication delivery pen and an open proximal end having an array of threads, said medication-containing cartridge assembly further including; a cartridge having a pierceably sealed distal end, and a plunger in sliding fluid tight engagement within the cartridge at a location distally of said array of threads; and a pen body assembly releasably mountable on said medication-containing cartridge assembly of said medication delivery pen for moving said plunger in said cartridge, said pen body assembly having; a housing surrounding said pen body assembly and having opposed proximal and distal ends, said distal end having an array of threads dimensioned and having a pitch for threaded engagement with said array of threads at said proximal end of said medication-containing cartridge assembly, a lead screw having a proximal end disposed in said housing, a distal end projecting beyond said distal end of said housing for selective engagement with said plunger, and an array of threads extending between said proximal and distal ends of said lead screw and defining a pitch substantially equal to said pitch of said array of threads at said distal end of said pen body assembly, driver means in said pen body assembly for moving said lead screw distally in said pen body assembly selected amounts, dose setting means for defining specified distances of distal travel for defining specified distances of distal travel for said lead screw corresponding to selected doses of medication to be delivered and causing said driver means to move said lead screw and said plunger in said cartridge distally a defined specified distance corresponding to a selected dose, and clutch means in said pen body assembly for disconnecting said dose setting means from said lead screw when said cap is mounted on said pen body assembly and connecting said dose means to said lead screw means when said cap is not mounted on said pen body assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification