Various pump configurations for oral irrigators. In one example, an oral irrigator including a reservoir, a handle, a pump body is disclosed. The pump body includes a pump inlet, a wall defining a planar area, a pump outlet disposed adjacent to an edge of the planar area and extending through the wall into the pump body. The pump inlet and the pump outlet are in fluid communication with the reservoir and a first valve is disposed at least partially within the pump body and a second valve disposed at least partially within the pump body.

An oral irrigator including a reservoir, a handle, a tip, a pump, a motor connected to the pump and configured to selectively actuate the pump, a processing element, and a signal generator, wherein during operation in a normal mode, the signal generator provides a first control signal to the motor causing the pump to cycle at a first pulse rate having a first flow rate over a first time duration and has a normal magnitude and a normal frequency, and wherein during operation in a massage mode, the signal generator provides a second control signal to the motor, the second control signal having a massage magnitude below the normal magnitude and a massage frequency longer than the normal frequency causing the pump to cycle at a second pulse rate and having a second flow rate over a second time duration.

A dental handpiece for drilling and suctioning includes a handle including multiple tubes extending along the handle from a first end of the handle to a second end of the handle. The dental handpiece also includes a head, connected to the first end of the handle, including a fluid nozzle connected to a first tube and a turbine operatively connected to an attachment unit to engage a dental burr and a second tube. The dental handpiece further includes a suction system, attached to the head, for suctioning inside an oral cavity including a suction head. The suction head is connected to a third tube via a 360-degree rotation tube configured to rotate the suction head. The second end of the handle and the multiple tubes are configured to engage in a main dental instrument.

An oral rinse capsule is provided. The oral rinse capsule is configured to be mounted in a capsule accommodating chamber of a water flosser, and includes a capsule shell assembly, a moving member, a piston assembly, and a connecting shell. The moving member is movably arranged in the capsule shell assembly. The oral rinse accommodating chamber is formed between an inner wall of the moving member and an inner wall of the capsule shell assembly. The capsule shell assembly is further provided with a piston chamber. The piston chamber is communicated to the oral rinse accommodating chamber and is configured to be communicated to a liquid outlet of the water flosser. The piston assembly is slidably arranged in the piston chamber. The connecting shell is provided with a sliding chamber. The capsule shell assembly is slidably arranged in the sliding chamber.

A pump assembly for a dental cleaning appliance includes a positive displacement pump including a fluid chamber and a fluid displacement member which is moveable in a linear direction relative to the fluid chamber, and a drive for actuating the pump to draw fluid into the fluid chamber through a fluid inlet. An energy storage device converts kinetic energy generated during actuation of the pump by the drive into potential energy, and stores the potential energy. A cam is connected to the drive for rotation relative to the fluid displacement member. The cam has a ramp extending about the fluid displacement member which is engaged by a cam follower connected to the fluid displacement member. As the cam moves relative to the fluid displacement member, the cam follower moves along the ramp to actuate the pump to draw fluid into the fluid chamber, and beyond the end of the ramp to enable the energy storage device to use the stored potential energy to actuate the pump to urge fluid from the fluid chamber.