Fluid-dispensing and refilling system for a power toothbrush
Patent 6220772 Issued on April 24, 2001. Estimated Expiration Date: 
September 24, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 24, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3400996 3613698 3636947 3809977 Toothbrush with dentifrice cartridge Fountain tooth-brush Toothbrush with self-contained dentifrice and disposable handle Toothbrush Toothbrush with built-in "squeezable" valved toothpaste holder Combined toothbrush and toothpaste dispenser InventorAssigneeApplicationNo. 404972 filed on 09/24/1999US Classes:401/176, Slidable piston92/162R, SPACED CYLINDER AND PISTON WALLS DEFINE PASSAGE BETWEEN OPPOSED PISTON SIDE WALL ENDS401/150, Piston in cylinder401/284, Material directed to periphery of tool401/286, Feeder terminates among tool elements417/211, INERTIA-TYPE PUMPING MEMBER OR DRIVE MEANS417/469Cylinder and piston reciprocate on common axisExaminersPrimary: Eloshway, Charles R.Attorney, Agent or FirmForeign Patent References
International ClassesA46B 011/04A46B 013/04 AbstractA pump used in a power toothbrush for fluid delivery to the bristles. The pump moves fluid provided to it to a dispensing valve located in the brushhead. The pump includes a pump chamber with a piston ball located therein. The piston ball moves within the chamber in response to movement of the brushhead, moving fluid out a discharge end of the pump chamber under pressure. The pump includes a fluid exit channel which connects the discharge end of the pump chamber with an opening in the brushhead in which the dispensing valve is located.Field of SearchIn or at feederInflexible solid means Piston in cylinder Responsive to movement of implement Feeder terminates among tool elements Attached or attachable to conduit supply means Slidable piston Including mechanical-movement actuator Handle mount Cleaning INERTIA-TYPE PUMPING MEMBER OR DRIVE MEANS Cylinder and piston reciprocate on common axis SPACED CYLINDER AND PISTON WALLS DEFINE PASSAGE BETWEEN OPPOSED PISTON SIDE WALL ENDS | |
