Patent ID: 6135567
Filing Date: 2000-10-24
Classification: B27B,B28D,E01C,E02F

Abstract:
An apparatus for engaging a surface, the apparatus comprising:(a) a rotatable member for engaging the surface, the rotatable member having an axis of rotation;(b) a rocker, the rocker having a forward end, a rearward end, and a surface contact face, the surface contact face of the rocker extending from the forward end of the rocker to the rearward end of the rocker; and,(c) attaching means rotatably mounting and fixedly positioning the rotatable member over the rocker so that, upon contact of the surface contact face of the rocker with the surface, and upon forward or rearward rocking motion of the rocker, the axis of rotation of the rotatable member moves away from or toward the surface, causing the rotatable member to engage the surface at varying depths.