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US 4,893,662 AGranted
Cutting tool
OwnerVito Gervasiinventor
Life of this patent
Estimating the term…
Abstract
A cutting tool for a planer or similar machine is described. The tool comprises a flat blade having a straight cutting edge, a blade holder for holding said blade for rotation about an axis and means for locating said blade on said holder to have said blade present one cutting angle at one axial end and a different cutting angle at an opposite axial end, and to have the two opposite axial ends of the cutting edge of the blade located substantially at the same distance from the axis of rotation of the blade holder.
Claims35
In a wood planer, apparatus comprising:
- (a) a generally cylindrical cutterhead having an axis of revolution, an outer surface and at least one generally elongated slot in said surface, said slot having a bottom and one long wall joined to said bottom, said one long wall of said slot being defined by a flat plane which is inclined at acute angle relative to a flat plane which contains said axis;
- (b) a flat cutting blade adapted to fit within said slot and against said one long wall, said blade having two parallel spaced apart flat sides, a flat base between said sides, two opposite ends which are generally perpendicular to said base and said sides, and a straight flat bevelled cutting edge which is located opposite to said base;
- and
- (c) alignment and holding means, carried by said cutterhead, for holding said blade in said cutterhead against said one long wall of said slot and for aligning said blade relative to said outer surface to have one end of said cutting edge present a first predetermined cutting angle and an opposite end of said cutting edge present a second predetermined cutting angle which is greater than said first predetermined cutting angle and to have said one end of said cutting edge located substantially at the same distance from said axis as said opposite end of said cutting edge, said first and second angle being selected to optimize the planing of a family of hardwoods or one species of hardwood.
1 more element
In a wood planer, apparatus comprising:
- (a) a generally cylindrical cutterhead having an axis of revolution, an outer surface and a plurality of evenly spaced generally rectangular slots in said surface, the axis of each slot being inclined at an acute angle to a first flat plane containing said axis of revolution, said slots having two long generally flat interior walls which are inclined at said acute angle and a bottom wall which together define an outwardly converging cross section that is wider at the interior of said cutterhead than at the outer surface of said cutterhead, said bottom wall being generally parallel to a second flat plane containing said axis of revolution;
- (b) a flat cutting blade for each slot, each blade having two parallel spaced apart flat sides, a flat straight base between said sides, two opposite flat ends joined to said base and said sides, and a straight flat bevelled cutting edge which is located opposite said base;
- (c) filling means, fitting together with each blade, for substantially filling each slot;
- (d) alignment means, carried by said cutterhead adjacent said bottom of each slot, for aligning its blade relative to said outer surface to have one end of the cutting edge of its blade present a first predetermined cutting angle of approximately fifteen degrees and an opposite end of the cutting edge of its blade present a second predetermined cutting angle of approximately twenty-five degrees and to have said one end of said cutting edge located substantially at the same distance from said axis of revolution as said opposite end of said cutting edge, said alignment means comprising adjustable means threaded into said cutterhead at opposite ends of said bottom of each slot for raising and lowering the base of its blade relative to said outer surface of said cutterhead;
- (e) means, carried by the planer, for establishing the radial position of said one end and said opposite end of said cutting edge of each blade, such that one end of the cutting edge of each blade is located substantially at the same distance from said axis of revolution as the opposite end of the cutting edge;
- and
- (f) threaded means, carried by said cutterhead adjacent each slot, for holding said filling means and its blade in that slot.
4 more elements
A planer, comprising:
- (a) a cutterhead having an axis of rotation and at least one axially inclined cavity;
- and
- (b) straight edged blade means having two flat generally parallel sides, a bottom end which is generally flat and which is perpendicular to said sides and a generally flat bevelled upper surface which is disposed between said sides, one of said sides and said bevelled surface defining a straight cutting edge;
- and
- (c) holding means, carried by said cutterhead, for holding said blade means in said cavity of said cutterhead to have said sides of said blade at an acute angle relative to a plane containing said axis of rotation, to have one end of said cutting edge at a first predetermined cutting angle and an opposite end of said cutting edge at a second predetermined cutting angle, and to have said one end located at generally the same distance from said axis of rotation as said opposite end, said first and second cutting angles being selected to optimize the planing of a family of hardwoods or a species of hardwood.
2 more elements
A cutterhead adapted to use a generally flat cutting blade having a straight leading edge defined by two flat intersecting plane, comprising:
- (a) a drum having at least one elongated cavity along the periphery of said drum and having an axis of rotation;
- and
- (b) means for removably holding one blade in said cavity of said drum to have opposite ends of the straight leading edge project beyond said periphery of said drum at generally the same distance from said axis, and to have the leading edge lie along an intersection of two flat planes which are inclined at acute angles to said axis of rotation, and to have said leading edge present a range of cutting angles which are selected to optimize the planing of a range of hardwoods or species of hardwood.
A method of using a straight edged planer blade to reduce noise and improve wood working quality for a range of hardwoods, comprising the steps of:
- (a) locating in a generally cylindrical drum a plurality of straight edged cutting blades in at least two rows at each end of the drum with each blade in each row offset from the blades in the other rows and with adjacent ends of each blade row overlapping each other;
- (b) positioning the cutting edge of each blade along a line defined by two mutually perpendicular planes which are inclined at an angle relative to the axis of rotation of the cutterhead such that one end of the blade is inclined at a first predetermined cutting angle of approximately 15 degrees and the opposite end of the blade is inclined at a cutting angle of 25 degrees;
- and
- (c) fixing the height of said blade relative to said drum such that said one end is approximately at the same distance from the axis of said cutterhead as said opposite end.
1 more element
A planer cutting tool, comprising:
- (a) a generally cylindrical cutterhead having an axis of revolution, an outer surface and at least one elongated slot in said surface;
- (b) a flat cutting blade adapted to fit within said slot, said blade having two parallel spaced apart long flat sides, a flat straight base between said long sides, two opposite flat ends which are joined to said base and said sides, and a straight flat bevelled cutting edge which is at an angle to said base;
- and
- (c) alignment and holding means, carried by said cutterhead, for holding said blade in said slot and aligning said blade relative to said outer surface to have one end of said cutting edge present a first predetermined cutting angle and the opposite end of said cutting edge present a second predetermined cutting angle which is greater than said first predetermined cutting angle and to have said one end located substantially at the same distance from said axis as said opposite end.
1 more element
A planer cutting tool for blades having two parallel spaced apart flat sides, a flat straight base between the sides, two opposite ends which are generally perpendicular to the base and the sides, and a straight flat bevelled cutting edge which is included at an angle to the base, comprising:
- (a) a cutterhead having an axis of revolution;
- and
- (b) holding means, carried by said cutterhead, for holding thereon a plurality of blades to have the cutting edge of each blade present a predetermined range of cutting angles to the workpiece and to have one end of the cutting edge of said blade located substantially at the sam distance from said axis as an opposite end of the blade.
In a wood planer, apparatus comprising:
- (a) a generally cylindrical cutterhead having an axis of revolution, an outer surface and no more than four elongated blade slots in said surface, each of said slot having a bottom wall means and a side wall means which are inclined angles to set of mutually perpendicular planes which define said axis, said side wall means comprising a generally flat fixed wall formed into said cutterhead and removable shimming means, said shimming means having a substantially flat cutterhead wall disposed against said fixed wall and a substantially flat blade wall which is located opposite to said cutter wall;
- and
- (b) means, carried by said cutterhead, for holding a blade in a blade slot and for aligning said blade relative to said outer surface to have the cutting edge of said blade lie at the intersection of two flat planes which are perpendicular to each other and which are inclined at an acute angle to two flat mutually perpendicular planes defining said axis of revolution, and to have one end of said cutting edge located substantially at the same distance from said axis as an opposite end of said cutting edge.
A planer, comprising:
- (a) a cutterhead having an axis of rotation and at least one axially inclined cavity;
- and
- (b) straight edged blade means having two flat generally parallel sides, a bottom end which is generally flat and which is perpendicular to said sides and a generally flat bevelled upper surface which is disposed between said sides, one of said sides and said bevelled surface defining a straight cutting edge;
- and
- (c) holding and shimming means carried in said cutterhead for holding said blade means in said cavity of said cutterhead to have said sides of said blade at an acute angle relative to a plane containing said axis of rotation, to have one end of said cutting edge at a first predetermined cutting angle and an opposite end of said cutting edge at a second predetermined cutting angle, and to have said one end located at generally the same distance from said axis of rotation as said opposite end.
2 more elements
A cutterhead adapted to use a generally flat cutting blade having a straight leading edge defined by two flat intersecting planes, comprising:
- (a) a drum having at least one elongated cavity along the periphery of said drum and having an axis of rotation;
- and
- (b) means for removably holding and incremently positioning one blade in said cavity of said drum to have opposite ends of the straight leading edge project beyond said periphery of said drum at generally the same distance from said axis, and to have the leading edge lie along an intersection of two flat planes which are inclined at acute angles to said axis of rotation.
A method of using a straight edged planer blade to reduce noise and improve wood working quality for a range of hardwoods, comprising the steps of:
- (a) locating in a generally cylindrical drum a plurality of axially inclined walls which are inclined at a first acute angle;
- (b) locating, relative to each of said walls, a plurality of straight edged cutting blades in at least two rows at each end of the drum with each blade in each row off-set from the blades in the other rows and with adjacent ends of each blade row overlapping each other;
- (c) adding at least one wedge-shaped shim between each blade and one of said walls;
- (d) positioning the cutting edge of each blade at a position defined by two mutually perpendicular planes which are inclined at an angle relative to the axis of rotation of the cutterhead such that one end of the blade is inclined at a first predetermined cutting angle;
- and
- (e) fixing the height of said blade relative to said cutterhead such that said one end is approximately at the same distance from the axis of said cutterhead as said opposite end.
3 more elements
In a wood planer, apparatus comprising:
- (a) a generally cylindrical cutterhead having an axis of revolution, an outer surface and at least one generally elongated slot in said surface, said slot having a bottom and one long wall joined to said bottom, said one long wall of said slot being defined by a flat plane which is inclined at acute angle relative to a flat plane which contains said axis;
- (b) a flat cutting blade adapted to fit within said slot and against said one long wall, said blade having two parallel spaced apart flat sides, a flat base between said sides, two opposite ends which are generally perpendicular to said base and said sides, and a straight flat bevelled cutting edge which is located opposite to said base;
- (c) alignment and holding means, carried by said cutterhead, for holding said blade in said cutterhead against said one long wall of said slot and for aligning said blade relative to said outer surface to have one end of said cutting edge present a first predetermined cutting angle and an opposite end of said cutting edge present a second predetermined cutting angle which is greater than said first predetermined cutting angle and to have said one end of said cutting edge located substantially at the same distance from said axis a said opposite end of said cutting edge;
- and
- (d) angle changing means, disposed between at least one of said sides of said blade and at least one of said alignment and holding means and said long wall of said slot, for changing said first predetermined cutting angle and said second predetermined cutting angle by at least a predetermined increment.
2 more elements
In a wood planer, apparatus comprising:
- (a) a generally cylindrical cutterhead having an axis of revolution, an outer surface and a plurality of evenly spaced generally rectangular slots in said surface, the axis of each slot being inclined at an acute angle to a first flat plane containing said axis of revolution, said slots having two long generally flat interior walls which are inclined at said acute angle and a bottom wall which together define an outwardly converging cross section that is wider at the interior of said cutterhead than at the outer surface of said cutterhead, said bottom wall being generally parallel to a second flat plane containing said axis of revolution;
- (b) a flat cutting blade for each slot, each blade having two parallel spaced apart flat sides, a flat straight base between said sides, two opposite flat ends joined to said base and said sides, and a straight flat bevelled cutting edge which is located opposite said base;
- (c) filling means, fitting together with each blade, for substantially filling each slot such that said blade and said wedge means have substantially the same cross section as said slot, said filling means comprising:
- a gib which is located adjacent one of said long walls, and shimming means, on at least one side of said blade, for changing the position of said blade relative to at least one long wall of said slot;
- (d) alignment means, carried by said cutterhead adjacent said bottom of each slot, for aligning its blade relative to said outer surface to have one end of the cutting edge of its blade present a first predetermined cutting angle and an opposite end of the cutting edge of its blade present a second predetermined cutting angle and to have said one end of said cutting edge located substantially at the same distance from said axis of revolution as said opposite end of said cutting edge, said alignment means comprising adjustable means threaded into said cutterhead at opposite ends of said bottom of each slot for raising and lowering the base of its blade relative to said outer surface of said cutterhead;
- (e) means, carried by the planer, for establishing the radial position of said one end and said opposite end of said cutting edge of each blade, such that one end of the cutting edge of each blade is located substantially at the same distance from said axis of revolution as the opposite end of the cutting edge;
- and
- (f) threaded means, carried by said cutterhead adjacent each slot, for holding said blade and its gib and its shimming means in that slot.
5 more elements
A planer, comprising:
- (a) a cutterhead having an axis of rotation and at least one axially inclined cavity;
- and
- (b) straight edged blade means having two flat generally parallel sides, a bottom end which is generally flat and which is perpendicular to said sides and a generally flat bevelled upper surface which is disposed between said sides, on of said sides and said bevelled surface defining a straight cutting edge;
- (c) holding means, carried by said cutterhead, for holding said blade means in said cavity of said cutterhead to have said sides of said blade at an acute angle relative to a plane containing said axis of rotation, to have one end of said cutting edge at a first predetermined cutting angle and an opposite end of said cutting edge at a second predetermined cutting angle, and to have said one end located at generally the same distance from said axis of rotation as said opposite end;
- (d) shimming means, on at least one side of said blade for changing the position of said blade relative to at least one such of said long walls of said slot such that said first predetermined cutting angle is increased and said second predetermined cutting angle is increased;
- and
- (e) a gib, fitting together with said blade and said shimming means, for substantially filling each slot.
4 more elements
A cutterhead adapted to use a generally flat cutting blade having a straight leading edge defined by two flat intersecting planes, comprising:
- (a) a drum having at least one elongated cavity along the periphery of said drum and having an axis of rotation;
- and
- (b) means for removably holding one blade in said cavity drum to have opposite ends of the straight leading edge project beyond said periphery of said drum at generally the same distance from said axis, and to have the leading edge lie along an intersection of two flat planes which are inclined at acute angles to said axis of rotation, and to have said leading edge present a range of cutting angles;
- and
- (c) angle changing means, disposed in said cavity, and at least one of the flat sides of the blade, for changing said range of the cutting angle by at least a predetermined increment.
2 more elements
A method of using a straight edged planer blade to reduce noise and improve wood working quality for a range of hardwoods, comprising the steps of:
- (a) establishing in a drum a plurality of axially inclined cavities for each blade, each cavity having at least one elongated flat wall which is open to the exterior of said drum;
- (b) locating in said cavities a plurality of straight edged cutting blades in at least two rows at each end of the drum with each blade in each row off-set from the blades in the other rows and with adjacent ends of each blade row overlapping each other;
- (c) inserting at least one wedge-shaped shim between said flat wall and said blade;
- (d) positioning the cutting edge of each blade along a line defined by two mutually perpendicular planes which ar inclined at an angle relative to the axis of rotation of the cutterhead such that one end of the blade is inclined at a first predetermined cutting angle and the opposite end of the blade is inclined at a cutting angle;
- and
- (e) fixing the height of said blade relative to said drum such that said one end is approximately at the same distance from the axis of said cutterhead as said opposite end.
3 more elements
Dependencies are inferred from the claim text.