Multi-blade razors
US7448135B2 · kind B2 · utility
31Cited by
44References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2006 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | Aug 20, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26B21/60
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Multi-blade razors are provided, having blades with differing properties. In one aspect, a razor is provided that includes a safety razor blade unit comprising a guard, a cap, and first, second and third blades with parallel sharpened edges located between the guard and cap with the first blade closest to the cap, the third blade furthest from the cap, and the second blade disposed between the first and third blades, the blades having first, second and third tip radii, respectively, at least two of the three blades having different tip radii, and at least two of the blades having different coefficients of friction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.