Reciprocating saw
AssigneeJarvis Products Corporation
InventorLeo J. Kendzior
Life of this patent
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Abstract
A reciprocating blade saw wherein the counterbalancing of the drive system includes the provision of two directly opposed and coaxial rams, one attached to the saw blade and the other having a mass equal to the first ram plus the blade, both being attached to a crankshaft by links which have their masses symmetrically distributed. The crankshaft is driven by a hydraulic motor, and all the masses are so matched that the saw is in balance at all speeds and can be operated at high speeds with minimal vibration. The saw is designed for use particularly in the meat industry.
Claims7
A reciprocating blade saw comprising a motor, a saw blade, a drive system and an elongated housing, the drive system including a crankshaft having three eccentric assemblies, a saw drive ram axially slidable in the forward portion of the housing, a counterbalance ram slidable in the rear portion of the housing coaxially with the saw drive ram, a drive link connecting the middle eccentric assembly to the saw drive ram and drive links connecting each other eccentric assembly to the counterbalance ram and straddling said counterbalance ram, said other eccentric assemblies being oriented 180.degree. from the middle eccentric assembly and the mass of the counterbalance ram being substantially equal to the total mass of the saw blade and the saw drive ram.
Dependencies are inferred from the claim text.