Fluid delivery device, transcutaneous access tool and fluid drive mechanism for use therewith

A fluid delivery device comprising:

• a fluid reservoir;
• a transcutaneous access tool fluidly coupled to the fluid reservoir;
• and
• a drive mechanism comprising:
• a drive wheel;
• a plunger received in the reservoir;
• a leadscrew extending from the plunger;
• a nut threadably engaged with the leadscrew;
• and
• a clutch mechanism coupled to the drive wheel, the clutch mechanism configured to allow the nut to pass through the clutch mechanism when disengaged and to couple the nut to the drive wheel when engaged, the drive wheel configured to rotate the nut to advance the leadscrew and the plunger into the reservoir while the clutch mechanism is engaged.

A drive mechanism for a fluid delivery device, comprising:

• an elongated assembly including a first elongated member and a second elongated member, wherein the first elongated member is configured to extend from a plunger within a reservoir and the second elongated member is coupled to the first elongated member;
• a drive wheel;
• and
• a clutch mechanism coupled to the drive wheel, wherein the clutch mechanism is configured to allow the second elongated member to pass through the clutch mechanism when disengaged and is configured to couple the second elongated member to the drive wheel when engaged, the drive wheel configured to rotate the second elongated member to advance the first elongated member and the plunger into the reservoir while the clutch mechanism is engaged.

A drive mechanism for a fluid delivery device, comprising:

• a drive wheel including a recess comprising a pocket and an axially aligned through-hole;
• a resiliently biased gripping member seated within the pocket of the recess;
• a transmission element configured to convert rotational motion into axial motion of a plunger;
• and
• a clutch mechanism operable between:
• a disengaged state, in which the transmission element is permitted to translate axially through the axially aligned through-hole of the recess without contacting the resiliently biased gripping member, and
• an engaged state, in which rotational motion of the drive wheel is transmitted to the transmission element via the resiliently biased gripping member engaging the transmission element.