Dispensing device
AssigneeTata Elxsi Limited
InventorsVasanthan Mani, Suresh Kumar Natarajan
Life of this patent
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Abstract
A dispensing device is provided to dispense a designated amount of a material on every dose delivery operation. The dispensing device includes a thumb pad, a cam drum coupled to the thumb pad, and a pawl nut comprising a one-way pawl. The thumb pad may be pulled out in a direction away from a distal end of the dispensing device for setting a dose of the material to be dispensed out and may be pushed in towards the distal end for delivering the dose. The cam drum includes a plurality of linear cam profiles and a plurality of helical cam profiles that may be disposed on a surface of the cam drum. The one-way pawl may engage with a ratchet disposed at a distal end of the cam drum and may prevent a rotation of the cam drum in an undesired direction.
Claims30
A dispensing device (102), comprising:
- a thumb pad (202) that is configured to be pulled out in a direction away from a distal end (106) of the dispensing device (102) for setting a dose of a material to be dispensed and to be pushed in towards the distal end (106) of the dispensing device (102) for delivering the dose;
- a cam drum (204) that is coupled to the thumb pad (202), wherein the cam drum (204) comprises:
- a distal end that comprises a ratchet (904);
- a plurality of linear cam profiles (502A-D) disposed on a surface of the cam drum (204), wherein the thumb pad (202) is configured to ride on at least one linear cam profile selected from the plurality of linear cam profiles (502A-D) when setting the dose, and
- a plurality of helical cam profiles (504A-D) disposed on the surface of the cam drum (204), wherein the thumb pad (202) is configured to ride on at least one helical cam profile selected from the plurality of helical cam profiles (504A-D) when delivering the dose;
- and
- a pawl nut (214) comprising a one-way pawl (1804), wherein the one-way pawl (1804) is configured to engage with the ratchet (904) that is disposed at the distal end of the cam drum (204) and is further configured to prevent a rotation of the cam drum (204) in an undesired direction.
Dependencies are inferred from the claim text.