Dry shavers
US4797997A · kind A · utility
32Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1987 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Nov 4, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB26B19/046
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a twin head dry shaver, the shaver heads are carried at the upper end of a four-bar mounting linkage comprising vertical side members 1A, 1B and bell crank links 2, 3 pivotally connected to the side members at points 7, 8 and 9, 11. The links are pivotally connected to the frame by pivot pins 4 and 6 set above and mid-way between the connections to the side members, thus rendering the heads highly sensitive to cut of balance forces acting on the heads so that they may move vertically, relative to each other to restore the balance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.