Patent ID: 9731067
Date: 2017-08-15
CPC Classifications: A61M

Claim:
1. A mechanical injection pump wearable by a user to deliver a first fluid and a second fluid, the mechanical injection pump comprising: a pump body defining a first fluid chamber and a second fluid chamber, the first fluid chamber being operable to hold the first fluid and the second fluid chamber being operable to hold the second fluid; a common connector having a first inlet, a second inlet, and a common outlet; a first fluid system including the first fluid chamber, a first button drive operably connected to the first fluid chamber, a first fluid delivery path in fluid communication between the first fluid chamber and the first inlet, a first piston slideably disposed in the first fluid chamber, and a first axial shaft operably connected between the first button drive and the first piston, wherein the first axial shaft has external threads, and the first button drive comprises: a second fluid system including the second fluid chamber, a second button drive operably connected to the second fluid chamber, a second fluid delivery path in fluid communication between the second fluid chamber and the second inlet, a second piston slideably disposed in the second fluid chamber, and a second axial shaft operably connected between the second button drive and the second piston; wherein force by the user on the first button drive causes the ratchet assembly to rotate the axially fixed ratchet wheel a predetermined angle to advance the first piston a first predetermined distance into the first fluid chamber to drive a predetermined volume of the first fluid from the first fluid chamber, through the first fluid delivery path to the common connector, and out the common outlet; and force by the user on the second button drive advances the second piston a second predetermined distance into the second fluid chamber to drive a predetermined volume of the second fluid from the second fluid chamber, through the second fluid delivery path to the common connector, and out the common outlet.