Waste ejecting blade assemblies for hand-held cutting tools

A blade assembly for a fiber-cement siding cutting tool, comprising:

• a first finger having a first guide surface and a first interior surface transverse to the first guide surface, the first finger being attachable to the cutting tool;
• a second finger having a second guide surface and a second interior surface transverse to the second guide surface, the second finger being attachable to the cutting tool to position the first and second guide surfaces in a guide plane and to space the first and second interior surfaces apart from one another;
• and
• a reciprocating cutting member between the first and second fingers, the cutting member having a body and a blade projecting from the body, the body being pivotally coupled to the first and second fingers, the blade having a first side surface facing the first interior surface of the first finger, a second side surface facing the second interior surface of the second finger, a top surface between the first and second side surfaces, and a waste ejection member at a rear portion of the top surface configured to direct a waste portion of the workpiece away from the blade toward the first or second finger.

A blade assembly for a reciprocating fiber-cement siding cutting tool, comprising:

• a first finger having a first guide surface and a first interior surface, the first finger being attachable to the cutting tool to position the first guide surface in a first guide plane;
• a second finger having a second guide surface and a second interior surface, the second finger being attachable to the cutting tool to space the first and second interior surfaces apart from one another and to position the second guide surface in a second guide plane, wherein the first and second guide planes are offset from each other;
• and
• a reciprocating cutting member pivotally coupled between the first and second fingers, the cutting member having a body and a blade projecting from the body, the body being pivotally coupled to the first and second fingers, the blade having a first side surface facing the first interior surface of the first finger, a second side surface facing the second interior surface of the second finger, and a top surface between the first and second side surfaces, the top surface having an arcuate portion configured to be a cutting surface.

A blade assembly for a reciprocating fiber-cement siding cutting tool, comprising:

• a first finger having a first guide surface and a first interior surface, the first finger being attachable to the cutting tool to position the first guide surface in a first guide plane;
• a second finger having a second guide surface and a second interior surface, the second finger being attachable to the cutting tool to space the first and second interior surfaces apart from one another and to position the second guide surface in a second guide plane, wherein the first and second guide surfaces are offset from each other;
• and
• a reciprocating cutting member between the first and second fingers, the cutting member having a body and a blade projecting from the body, the body being pivotally coupled to the first and second fingers, the blade having a first side surface facing the first interior surface of the first finger, a second side surface facing the second interior surface of the second finger, a top surface between the first and second side surfaces, and a waste ejection member at a rear portion of the top surface, the waste ejection member including a ramp having a front edge, a back edge, and an inclined portion between the front and back edges, the inclined portion being canted toward the first or second finger.

A cutting member for a hand-held cutting tool having a motor, a casing having a support adapted to carry a pair of fixed cutting blades in a spaced-apart relationship, the cutting member positioned to pivot about a transverse axis to reciprocate between the fixed cutting blades, the cuffing member comprising:

• a body operatively coupled to the motor;
• a blade projecting from the body, the blade having spaced-apart first and second side surfaces and a top surface between the first and second side surfaces;
• and
• a waste ejection member at a distal portion of the top surface, the waste ejection member including a ramp having a front edge, a back edge, and an inclined surface between the front and back edges, the inclined surface being canted toward one of the fixed cutting blades.

A fiber-cement cutting tool, comprising:

• a hand-held motor unit having a housing, a motor inside the housing, and a switch operatively coupled to the motor to selectively activate the motor;
• a head having a casing attached to the housing of the motor unit and a reciprocating drive assembly coupled to the motor;
• a first finger attachable to the head or motor unit, the first finger having a first guide surface and a first interior surface transverse to the first guide surface;
• a second finger having a second guide surface and a second interior surface transverse to the second guide surface, the second finger being attachable to the head or motor unit to position the first and second guide surfaces in a guide plane and to space the first and second interior surfaces apart from one another;
• and
• a reciprocating cutting member between the first and second fingers for severing fiber-cement along a cutting path, the cutting member having a body and a blade projecting from the body, the body being pivotally coupled to the first and second fingers, the blade having a first side surface facing the first interior surface of the first finger, a second side surface facing the second interior surface of the second finger, a top surface between the first and second side surfaces, and a waste ejection member at a rear portion of the top surface, the waste ejection member including a ramp having a front edge, a back edge, and an inclined portion between the front and back edges, the inclined portion being canted toward the first or second finger.

A fiber-cement cutting tool, comprising:

• a hand-held motor unit having a housing, a motor inside the housing, and a switch operatively coupled to the motor to selectively activate the motor;
• a head having a casing attached to the housing of the motor unit and a reciprocating drive assembly coupled to the motor;
• a first finger having a first guide surface and a first interior surface, the first finger being attachable to the head or motor unit to position the first guide surface in a first guide plane;
• a second finger having a second guide surface and a second interior surface, the second finger being attachable to the head or motor unit to space the first and second interior surfaces apart from one another and to position the second guide surface in a second guide plane, wherein the first and second guide planes are offset from each other;
• and
• a reciprocating cuffing member pivotally coupled between the first and second fingers, the cutting member having a body and a blade projecting from the body, the body being pivotally coupled to the first and second fingers, the blade having a first side surface facing the first interior surface of the first finger, a second side surface facing the second interior surface of the second finger, and a top surface between the first and second side surfaces, the top surface having an arcuate portion configured to be a cutting surface.

A method for cutting fiber-cement, comprising:

• engaging a first surface of the fiber-cement with guide surfaces of two spaced-apart finger portions of a cutting tool;
• reciprocating a blade between the fingers in a direction transverse to the guide surfaces along a stroke between an open position and a closed position;
• moving the fiber-cement and/or the cutting tool relative to the other along a cutting path;
• and
• ejecting waste portions cut from the workpiece away from the blade toward one of the finger portions.