Abstract: A pedal assembly for a drum or other foot-actuated device may comprise a curved pedal and an adjustable pedal return spring tensioner mechanism. An actuatable region disposed at a top surface of the pedal preferably comprises a first concavity disposed more or less centrally in a pedal length direction between a first convexity and a second convexity. The tensioner mechanism preferably comprises a vertical lead screw parallel to the pedal return spring and coupled by way of a nut to a lower end of the pedal return spring. The lead screw may be slidingly coupled to a vertical post. By causing the lead screw to be adjustable from above and have an efficiency low enough to prevent backdriving, a drummer or other such operator can conveniently adjust tension without the need for disassembly and without the need to loosen a locknut or other such locking means.

Abstract: A curved pedal having a pedal reference plane and having a width direction and a length direction may comprise an actuatable region disposed at a top surface of the curved pedal; and at least one curvature profile in the length direction within at least one portion of the actuatable region. Slope at the top surface relative to the pedal reference plane may vary smoothly within the at least one portion of the actuatable region. Radius of curvature of the top surface within the at least one portion of the actuatable region may, for example, be not less than one-half of the length of the actuatable region. The actuatable region may comprise at least one first convexity, at least one first concavity, and/or at least one second convexity. Where present, the at least one first concavity may be disposed centrally in the length direction between the at least one first convexity and the at least one second convexity.