Abstract: A thatch rake consisting of a frame carrying a multiplicity of downwardly projecting spring teeth dragging the ground and supporting the frame, said teeth being biased forwardly and downwardly but sprung rearwardly by forward motion of the frame, each tooth having a stop member intermediate its ends engageable with the frame after partial springing thereof to reduce its effective length so that portion between the stop and its free end, so as to increase its effective stiffness, and being so supported as to provide a pronounced downward movement thereof if allowed by ground contour to recover forwardly, so as to be enabled to follow uneven ground contours accurately, all of the teeth being connected loosely to allow only limited relative forward and rearward movement thereof, so as to prevent possible bouncing or "leapfrogging" movements of the rake.

Abstract: A mulch loosening rake consisting of a frame carrying a multiplicity of downwardly projecting spring teeth dragging the ground, said teeth being biased forwardly and downwardly but sprung rearwardly by forward motion of the frame, each tooth having a stop member intermediate its ends engageable with the frame after partial springing thereof to reduce its effective length to the portion between the stop and its free end, so as to increase its effective stiffness, and being so supported as to provide a pronounced downward movement thereof if allowed by ground contour to recover forwardly, so as to be enabled to follow the ground contour accurately.