Patent attributes
Devices with mechanical drivers for displaceable elements are described. In one aspect, a device includes a displaceable element, a driver, and a controller. The driver includes a plurality of actuatable drive elements. Each drive element has a respective engagement area that is operable to move from a respective start position to a respective end position and back to the start position. During movement from the start position to the end position the engagement area is engaged with the displaceable element and applies a mechanical force urging the displaceable element to move. During movement from the end position to the start position the engagement area is disengaged from the displaceable element. The controller is configured to choreograph the operation of the actuatable drive elements in moving the displaceable element.
