Patent ID: 6158817
Filing Date: 2000-12-12
Classification: B28D

Abstract:
A machine including a powered truck-like vehicle having a support base and an apparatus mounted on the base for making a groove into a surface, the apparatus comprising:two spaced-apart booms, said two booms being parallel to each other and each having one end pivotally mounted on the base;tilting means mounted on said base to tilt the parallel booms vertically in unison about their one ends;a rail-structure-holding head slidably mounted on each of said parallel booms;sliding means to slide each head separately along its respective boom;an elongated main rail having a pair of opposite ends;means for mounting the main rail on said heads for rotation about a longitudinal axis parallel to said elongated main rail, said means for mounting the main rail comprising:curved support members, each said curved support member being pivotally connected to its respective head for rotation about said longitudinal axis, and having a first end on which said main rail is pivotably mounted by a support means about a transversal axis perpendicular to said longitudinal axis, and a second end;power means extending between the second end of each curved support member and the respective head for levering the first end of said curved support member and, therefore, for rotating said main rail about said longitudinal axis;a saw carrier mounted on the main rail;displacing means for moving the saw carrier along the main rail in a first direction parallel to the longitudinal axis;a motorized saw mounted on said saw carrier;means on the saw carrier for displacing the saw on said saw carrier in a second direction perpendicular to said first direction;a powered extendible leg mounted on each opposite end of the main rail for stabilizing said apparatus whenever required;each leg being mounted pivotally on the main rail so that each leg can be rotated with respect to the main rail; andeach leg being fixable with respect to the main rail so that each leg can be rotated with the main rail around the longitudinal axis.