US3585980A — Method and device for removing mortar or the like…

Claim 1

Independent Claim 209 words

A dust free method of removing mortar or the like from between rows of superimposed bricks or the like by the use of a guard having a planar open edge and a spinning cutting disc substantially enclosed and pivotally carried by said guard and operating through said open edge, and a vacuum discharge passageway in said guard extending outwardly from one end of said planar open edge at an angle greater than 90* to the plane of said open edge comprising, turning on the vacuum apparatus, and the spinning cutting disc to maximum bringing the guard into substantial angular contact with the wall with the said one end of the planar open edge into initial substantial point contact with the wall, pivoting the guard about the point of wall contact until the disc enters the mortar of the wall, a predetermined depth and simultaneously bringing the open edge of the guard in full contact with the wall and then moving the guard and cutting disc while in full contact along the mortar line of the wall whereby the path of the spoils leaving the rim of the cutting disc is maintained substantially in line with the discharge passageway in the guard at all times including the initial cutting period.

Claim 2

Dependent Claim 209 words

A dust free method of removing mortar or the like from between rows of superimposed bricks or the like by the use of a guard having a planar open edge and a spinning cutting disc substantially enclosed and pivotally carried by said guard and operating through said open edge, and a vacuum discharge passageway in said guard extending outwardly from one end of said planar open edge at an angle greater than 90* to the plane of said open edge comprising, turning on the vacuum apparatus, and the spinning cutting disc to maximum bringing the guard into substantial angular contact with the wall with the said one end of the planar open edge into initial substantial point contact with the wall, pivoting the guard about the point of wall contact until the disc enters the mortar of the wall, a predetermined depth and simultaneously bringing the open edge of the guard in full contact with the wall and then moving the guard and cutting disc while in full contact along the mortar line of the wall whereby the path of the spoils leaving the rim of the cutting disc is maintained substantially in line with the discharge passageway in the guard at all times including the initial cutting period.

Claim 3

Dependent Claim 20 words

The method of claim 1 wherein the outlet is shaped to form a venturi to thereby enchance the extraction force.

Claim 4

Dependent Claim 33 words

The method of claim 1, wherein a shallow space is formed between the disc and guard both above and below the disc to cut down the volume of air close to the disc.

Claim 5

Dependent Claim 65 words

The method of claim 1, wherein the axis of the outlet path for the spoil is at all times approximately tangential to the point on the rim of the cutting disc where the rim emerges from the mortar and the guard is swung relative to the cutting disc to maintain said path at all times substantially in line with the discharge passageway in the guard.

Claim 6

Dependent Claim 143 words

A dust free method of removing mortar or the like from between rows of superimposed bricks or the like at the intersection of a pair of walls by the use of a guard having two straight open edges forming a V-shaped opening at one side and a vacuum discharge passageway at the other side and enclosing a spinning cutting disc operating operating through the apex of said V-shaped opening comprising, turning on the vacuum apparatus, and the spinning cutting disc to maximum, bringing the guard into contact with each wall with the straight open edges of the V-shaped opening in contact with the respective walls, then pivoting the cutting disc through each of the open edges and simultaneously into contact with the mortar of each wall and cutting a slot in each wall and sucking off the spoil through the vacuum discharge passageway.

Claim 7

Dependent Claim 143 words

A dust free method of removing mortar or the like from between rows of superimposed bricks or the like at the intersection of a pair of walls by the use of a guard having two straight open edges forming a V-shaped opening at one side and a vacuum discharge passageway at the other side and enclosing a spinning cutting disc operating operating through the apex of said V-shaped opening comprising, turning on the vacuum apparatus, and the spinning cutting disc to maximum, bringing the guard into contact with each wall with the straight open edges of the V-shaped opening in contact with the respective walls, then pivoting the cutting disc through each of the open edges and simultaneously into contact with the mortar of each wall and cutting a slot in each wall and sucking off the spoil through the vacuum discharge passageway.

Claim 8

Dependent Claim 20 words

The method of claim 5, wherein the outlet is shaped to form a venturi to thereby enhance the extraction force.

Claim 9

Dependent Claim 34 words

The method of claim 5, wherein a shallow space is formed between the disc and guard wall on each side of the disc to cut down the volume of air close to the disc.

Claim 10

Dependent Claim 186 words

A dust free method of removing mortar or the like from between rows of superimposed bricks to a predetermined depth in a wall or the like by the use of a guard substantially enclosed pivoted spinning cutting disc operating through a planar open edge of the guard, said guard having a vacuum discharge passageway therein leading from one end of said planar open edge and at an obtuse and an acute angle thereto comprising, turning on the vacuum apparatus an the spinning cutting disc to maximum, bringing the guard against the wall with the planar open end at an arcuate angle to the face of the wall, contacting the cutter disc with the wall substantially aligning the path of the spoils leaVing the rim of the cutter disc up with the discharge passageway in the guard and swing the planar open edge of the guard toward the face of the wall to maintain said substantial alignment as the disc cuts to the predetermined depth, then upon contact of the planar open edge with the face of the wall moving the guard and cutter along said wall.

Claim 11

Dependent Claim 186 words

A dust free method of removing mortar or the like from between rows of superimposed bricks to a predetermined depth in a wall or the like by the use of a guard substantially enclosed pivoted spinning cutting disc operating through a planar open edge of the guard, said guard having a vacuum discharge passageway therein leading from one end of said planar open edge and at an obtuse and an acute angle thereto comprising, turning on the vacuum apparatus an the spinning cutting disc to maximum, bringing the guard against the wall with the planar open end at an arcuate angle to the face of the wall, contacting the cutter disc with the wall substantially aligning the path of the spoils leaVing the rim of the cutter disc up with the discharge passageway in the guard and swing the planar open edge of the guard toward the face of the wall to maintain said substantial alignment as the disc cuts to the predetermined depth, then upon contact of the planar open edge with the face of the wall moving the guard and cutter along said wall.

Claim 12

Dependent Claim 40 words

The method as defined in claim 8, wherein said acute angle made by the planar open edge with the wall is substantially equal to the first-named acute angle made by the passageway with the planar open edge of the guard.

Claim 13

Dependent Claim 51 words

The method as defined in claim 8, wherein the fixed obtuse angle made by the passageway with the planar open edge is substantially the same as the angle made by the path of the spoils with the planar open edge when the disc is at its maximum depth in the wall.

Claim 14

Dependent Claim 143 words

A spoil guard for use with a cutting tool having a rotatable grinding or cutting disc, said guard comprising a housing for enclosing at least a part of the disc and defining a straight edged opening through which said disc can extend and a spoil outlet opening, means for mounting said disc in the housing and defining the rotational axis of the disc, said outlet opening being spaced to one side of said rotational axis and defining the entrance to an outlet duct, and the outlet duct having one wall extending from the end of said straight edged opening on said one side of the axis and the spoil outlet duct defining a longitudinal axis making approximately a right angle with the line joining the said rotational axis of the disc to the point of intersection of said longitudinal axis and said edge.

Claim 15

Dependent Claim 143 words

A spoil guard for use with a cutting tool having a rotatable grinding or cutting disc, said guard comprising a housing for enclosing at least a part of the disc and defining a straight edged opening through which said disc can extend and a spoil outlet opening, means for mounting said disc in the housing and defining the rotational axis of the disc, said outlet opening being spaced to one side of said rotational axis and defining the entrance to an outlet duct, and the outlet duct having one wall extending from the end of said straight edged opening on said one side of the axis and the spoil outlet duct defining a longitudinal axis making approximately a right angle with the line joining the said rotational axis of the disc to the point of intersection of said longitudinal axis and said edge.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1974-06-21	1974-12-21	1975-06-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1978-06-21	1978-12-21	1979-06-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1982-06-21	1982-12-21	1983-06-22	$7700.00	Window Closed / Lapsed

Method and device for removing mortar or the like from between superimposed rows of bricks or the like

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