Chain saw tensioning apparatus

An apparatus for tensioning a chain of a chain saw comprising:

• tensioner mounts for mounting the apparatus within a housing of the chain saw;
• tensioning guide means interconnected with the tensioner mounts, the tensioner guide means comprising:
• a tensioner guide channel having a side;
• a slot extending along the side;
• an aperture in the side positioned rearward of the slot;
• a tensioner box means interconnected with the tensioning guide means, the tensioner box means comprising:
• opposing sides with slots in registration with the slot in the tensioning guide means;
• an aperture extending through the opposing sides in registration with the aperture in the tensioning guide means;
• tensioner shaft means telescopically received by the tensioner box means, the tensioner shaft means comprising sides with slots corresponding to the slots in the tensioner box means and the tensioning guide means;
• a tension screw interconnected with the tensioner shaft means by a tensioner shank, at one end, the tension screw adjustably interconnected with the housing of the chain saw at the other end thereof;
• a tensioner nut for adjustably engaging the tension screw with the housing of the chain saw;
• a spring within the tensioner shaft means;
• a bolt grip within the tensioner shaft means, the bolt grip interconnected with the spring and biased forward with respect thereto;
• an anchor bolt extending through the tensioning guide means, the tensioner box means and a slot in a chain saw blade;
• a slidable bolt extending through the slot in the tensioning guide means, the slot in the tensioner box means, the slot in the tensioner shaft means, and an aperture in a chain saw blade;
• the bolt grip contacting the slidable bolt and acting against the slidable bolt to bias the bolt forward with respect to the housing of the chain saw, to bias the blade of the chain saw forward with respect to the housing, to tension the chain riding the chain saw blade.