US Patent 7975605 Food processing device

A food processing device, e.g. a salad spinner, has a housing with a lid, a basket supported in the housing for rotation, and a drive mechanism supported by the lid for rotating the basket to spin water from salad in the housing. The drive mechanism has a crank handle and a drive transmission system coupling the handle to the basket to transmit a rotational driving force from the handle to rotate the basket. The drive transmission system has a first rotary gear arranged to receive the rotational driving force from the handle and a second rotary gear in driving engagement with the first gear for receiving the rotational driving force from the first gear to rotate the basket. The first and second gears have corresponding serial formations, e.g., recesses and protrusions, of respective circular cross-sections that are inter-engageable, one in the other, for transmission of the driving force.