Patent ID: 6080460
Filing Date: 2000-06-27
Classification: E01C,Y10S,Y10T

Abstract:
In hoe-chucking mats for temporary protection of ground level ecosystems when crawler track propelled heavy equipment operates upon said mats, a mat structure utilizing portions of recycled tires in cable-strung assembly with one another, wherein said mat structure is characterized by provision of:a mat body section comprising: a set of shorter length units consisting of tread portions of said recycled tires, a set of longer length units also consisting of tread portions of recycled tires, every unit of said tread portions irrespective of length being perforated to receive cable strung therethrough; multiple similar lengths of said cable; an arrangement leaving no two of said shorter length units of said tread portions adjacent one another, thereby systematically distributing permanent airways through said mat body section, said airways being rectangular in plan view and bounded by stiffening means comprising internested deformed edges of said tread portions of recycled tires; said arrangement including at opposite ends of said mat body section successive multiple rows of said longer length units of said tread portions; opposed pairs of perforated cable-receiving rigid plates near opposite ends of each length of said cable strung through rows of said shorter and longer length units of tread portions of recycled tires, said plates during mat assembly being compressed against said rows; clamping means to secure said plates in position on said lengths of cable at mat body ends; and two looped-back and secured cable ends respectively forming a cable eye at each of two of said plates at one mat body end; said mat body section so comprised being united in combination witha mat-handling fixture for ground level mat emplacement and removal, and for hoisted swinging of a mat to de-limb a tree, comprising an intact whole recycled tire looped through by two chains the ends of which are secured by means of shackles to said two cable eyes at one end of said mat body section.