Brush having resiliently retractable bristles, in particular for brushing surfaces of complex shape, such as teeth
US4633542A · kind A · utility
64Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1985 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Apr 12, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46B7/06
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Tufts 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.