Brush having resiliently retractable bristles, in particular for brushing surfaces of complex shape, such as teeth
Patent 4633542 Issued on January 6, 1987. Estimated Expiration Date: 
April 12, 2005. 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.
April 12, 2005. 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 2882544 2935755 3082457 3129449 Differential hair engagement retainer Patent #: 4240451 InventorAssigneeApplicationNo. 06/722445 filed on 04/12/1985US Classes:15/167.1, Tooth or nail brush15/201Movable tuft sectionExaminersPrimary: Feldman, PeterAttorney, Agent or FirmInternational ClassesA46B 7/00 (20060101)A46B 7/06 (20060101) Foreign Application Priority Data1984-04-13 FRAbstractTufts of bristles (3) in a brush are resiliently retractable by thrusting against a membrane (5) which is capable of resilient spot deformation, with each tuft being retractable independently from the other tufts of the brush. Tufts are retracted into the brush in order to continuously match the envelope surface (18) defined by the free ends (15) of said tufts (3) to the shape of the surface to be brushed (17), and said matching takes place without substantial difference in the force applied to the various zones of said surface by the various tufts of bristles.Field of SearchMovable tuft section | |
