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US 4,825,741 AGranted
Reciprocatory machine tool
AssigneeRio Grande-Albuquerque, Inc.
InventorsRobert Wellington, Louis Bell
Life of this patent
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AssigneeRio Grande-Albuquerque, Inc.
InventorsRobert Wellington, Louis Bell
Estimating the term…
A power driven reciprocatory machine tool employs an endless belt trained in tension around spaced end pulleys to transmit reciprocatory movement of a drive attached to one run of the belt to a tool carrier clamped to the opposite run of the belt. The moving elements attached to the opposite runs of the belt counterbalance each other to minimize vibration generated by stroke reversal. In one application, the tool carrier mounts a relatively thin saw blade between spaced upper and lower arms which is employed to saw finely detailed edges on a workpiece manually guided to the blade on a stationary horizontal work table. Clamp means which are tightened by the tension of the blade couple the blade to upper and lower arms of the tool carrier, one of the clamp means being mounted on its arm by a manually adjustable blade tensioning device. The saw, tool carrier and drive may be rotatively adjusted about a horizontal axis to cut inclined or beveled edges on a workpiece supported on the stationary horizontal table.
A power driven reciprocatory machine tool comprising a first frame, a pair of pulleys mounted on said first frame for free rotation about spaced parallel axes, an endless belt operatively trained about said pulleys and extending between said pulleys along opposed parallel runs lying in a first general plane normal to said axes, tool carrier means fixedly secured to said belt at a location on one of said runs, drive means including reciprocable drive member means fixedly secured to said belt at a location on the other of said runs, and cyclically reversible power driven drive means for driving said drive member means in cyclically reversed linear movement along a path parallel to said first general plane, the weight of said drive member means being substantially equal to the weight of said tool carrier means whereby inertial forces induced by the reversal of the linear movement of said drive member means and said tool carrier means are counterbalanced.
Dependencies are inferred from the claim text.