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US 4,558,614 AGranted
Band saw apparatus and method
OwnerGerald R. Harrisinventor
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OwnerGerald R. Harrisinventor
Estimating the term…
Band saw apparatus are disclosed which include a drive assembly formed for support and guided movement of a saw blade for cutting of a workpiece, an endless band saw mounted to the drive assembly, and reciprocation apparatus formed for reciprocation of the blade toward and away from the workpiece to enable variation of the force per unit area of the cutting edge of the blade on the workpiece. In the preferred form blade reciprocation is provided by a pair of spaced apart guide assemblies each including independently operable fluid piston-cylinder assemblies coupled to a lever carrying guide blocks which engage the back edge of the saw blade. The guide blocks can be reciprocated by the fluid piston-cylinder assemblies in synchronism or out-of-phase to vary the amplitude, frequency and duration of displacement independently of blade speed and at two locations along a length of the blade so as to produce oscillation as well as simple reciprocation. Alternative blade displacement assembly constructions and a method for cutting workpieces employing the apparatus also are disclosed.
A method of cutting a workpiece with a band saw or the like having carriage means movably mounted or advancement of said saw blade toward said workpiece to effect cutting, including the steps of moving a cutting stretch of a saw blade between two blade support assemblies carried by said carriage means across said workpiece to effect cutting, and simultaneously and periodically varying the force per unit area of said saw blade against said workpiece, wherein the improvement in said method of cutting is comprised of:
A method of cutting a workpiece with a band saw or the like having automatic control means for advancing a movable carriage having the saw blade mounted thereto toward said workpiece to effect cutting which comprises the steps of:
Band saw apparatus including, movable carriage means, a pair of blade supporting wheels rotatably mounted to said carriage means and formed for support and movement of a saw blade thereon for cutting of a workpiece, an endless bandsaw blade mounted to said wheels and having a cutting stretch extending between said wheels, a pair of relatively spaced apart blade support assemblies mounted to said carriage means and each formed to engage said blade at spaced apart locations along said cutting stretch for support of said blade during cutting, and displacement means formed and mounted to reciprocate said blade toward and away from said workpiece during cutting movement of said blade, wherein the improvement in said band saw apparatus comprises:
Band saw apparatus including, blade drive means having a movable carriage formed for support and movement of a saw blade thereon for cutting of a workpiece, an endless bandsaw blade mounted to said carriage;
Band saw apparatus including, blade drive means formed for support and movement of a saw blade thereon for cutting of a workpiece, and endless bandsaw blade mounted to said drive means, a pair of relatively spaced apart blade support assemblies each having a guide element formed to engage said blade at spaced apart locations along the length of said blade, and displacement means coupled to at least one of said support assemblies and formed and mounted to reciprocate said guide element toward and away from said workpiece during cutting movement of said blade, wherein the improvement in said bandsaw apparatus comprises:
Dependencies are inferred from the claim text.