Fluid Dispenser with Rotating Pump

A fluid dispenser comprising:

• a fluid pump for dispensing a fluid;
• and
• a dispenser housing;
• wherein the fluid pump comprises:
• a piston chamber forming body;
• a piston member that is moveable along a piston axis relative to the piston chamber forming body between an extended position and a retracted position;
• and
• a piston rotator that is moveable along the piston axis relative to the piston chamber forming body between an expanded position and a contracted position;
• wherein, when the piston rotator is moved between the expanded position and the contracted position, the piston rotator rotates about the piston axis relative to the piston chamber forming body;
• wherein, on movement of the piston rotator from the expanded position to the contracted position, the piston rotator rotates the piston member about the piston axis relative to the piston chamber forming body from a loading position to an engagement position;
• wherein the dispenser housing comprises:
• a lock-out body comprising a rotator engagement surface and a piston receiving opening;
• a piston engagement body;
• and
• a pump activation mechanism that, on activation of the fluid dispenser, moves the piston engagement body between a first position and a second position;
• wherein the piston member has a keyed portion that is configured to pass through the piston receiving opening when the piston member is in the loading position;
• wherein, on assembly of the fluid dispenser, the fluid pump is moved relative to the dispenser housing from a disassembled condition to an assembled condition;
• wherein, on movement of the fluid pump from the disassembled condition to the assembled condition:
• the keyed portion of the piston member is passed through the piston receiving opening while the piston member is in the loading position;
• and
• the piston rotator engages with the rotator engagement surface, which moves the piston rotator from the expanded position to the contracted position, rotating the piston member from the loading position to the engagement position after the keyed portion of the piston member has passed through the piston receiving opening;
• wherein, when the fluid pump is in the assembled condition and the fluid dispenser is activated, the piston engagement body moves between the first position and the second position, engaging with the piston member and moving the piston member between the extended position and the retracted position, which causes the fluid pump to dispense the fluid.