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US 5,850,923 AGranted
Flour sifter
AssigneeDart Industries Inc.
InventorsPieter K. J. DeCoster, Dimitri M. C. J. Backaert
Life of this patent
Estimating the term…
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.
Claims7
A sifter for pulverulent foodstuff, comprising:
- a container having upper and lower ends and an interior for receiving said foodstuff;
- a sifter screen mounted to said lower end of said container in communication with said interior;
- an agitator mounted within said interior in close proximity to said sifter screen and for relative movement thereto, said agitator including a central hub with a peripheral surface and a crank arm extending radially outward from said hub, said crank arm including an elongated slot therein;
- and
- a drive arm mounted to, and for substantially reciprocating movement between first and second positions with respect to, said container, said drive arm including a pin received within said slot and further including a cam edge engaged with said peripheral surface of said hub, said cam edge causing relative sliding of said pin within said slot during said movement of said drive arm between said first and second positions.
2 more elements
Dependencies are inferred from the claim text.