Flour sifter
US5850923A · kind A · utility
8Cited by
20References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1996 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | Aug 30, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47J43/22
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A manual sifter including a rotor overlying a sifter screen and rotatable in response to longitudinal reciprocation of a drive arm engaging a crank wheel fixed to the rotor. The drive arm includes a projecting pin engaged within an elongated slot of the crank wheel, the drive arm having a cam edge thereon engage with the crank wheel to vary the torque applied to the rotation of the crank wheel as the arm reciprocates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.