Patent ID: 8733597

Claim:
A dispenser comprising: a reservoir configured to contain a liquid and a reservoir tube operably connected to the reservoir and configured to dispense liquid from the reservoir; a compression element on a rotor assembly, wherein the compression element compresses the reservoir tube when the rotor assembly rotates; a drive gear operably connected to the rotor assembly and configured to rotate the rotor assembly about an axle; a pawl configured to engage the drive gear when advanced in a first direction; the pawl being pivotably mounted on a housing where the housing rotates about the axle, and a ratchet spring for biasing the pawl toward a first position; a drive mechanism operably connected to the housing for rotating the housing about the axle for moving the pawl in the first direction; a backlash ratchet configured to engage a gear on the rotor assembly that prevents the rotor assembly from rotating in a second direction, wherein the second direction is opposite the direction the rotor assembly rotates when the pawl engages the drive gear, the gear having a larger diameter than the drive gear.