Pipe extracting tool

A ductile iron pipe extracting tool kit for use with a first ductile iron pipe having an outer surface defining an outer circumference and a second ductile iron pipe having an inner surface defining an inner circumference, the first ductile iron pipe received within an open end of the second ductile iron pipe with a gasket disposed between the first and second ductile iron pipes, wherein the gasket has an annular elastomeric body with a circumference sized to be disposed between the first and second ductile iron pipes and a plurality of metal segments extending radially inward from the annular elastomeric body, each metal segment including a plurality of teeth angled away from the open end of the second ductile iron pipe that are engageable with the outer surface of the first ductile iron pipe to prevent the first ductile iron pipe from being pulled axially outward from within the second ductile iron pipe, the ductile iron pipe extracting tool kit comprising:

• (a) a first tool piece, comprising:
• (i) a first arcuate blade having a circumferential length extending between first and second unbroken, continuous, straight edges and an axial length extending between third and fourth unbroken, continuous, straight edges, wherein the third and fourth unbroken, continuous, straight edges are substantially transverse to the first and second unbroken, continuous, straight edges, and wherein the arcuate blade comprises a material that extends continuously between the first, second, third, and fourth edges, the first arcuate blade having a shape and circumferential length to surround a first portion of the first ductile iron pipe and slide between the outer surface of the first ductile iron pipe and the inner circumference of the second ductile iron pipe to disengage the teeth of a first portion of the gasket from the outer surface of the first ductile iron pipe, the first arcuate blade having a circumferential length to define first and second excess portions on the first and second ends of the first arcuate blade;
• (ii) a first driving member portion extending radially outward from the first arcuate blade, the first driving member portion having an inner circumferential length less than the circumferential length of the first arcuate blade to define the first and second excess portions of the first arcuate blade;
• (b) a second tool piece, comprising:
• (i) a second arcuate blade having a circumferential length extending between first and second unbroken, continuous, straight edges and an axial length extending between third and fourth unbroken, continuous, straight edges, wherein the third and fourth unbroken, continuous, straight edges are substantially transverse to the first and second unbroken, continuous, straight edges, and wherein the second arcuate blade comprises a material that extends continuously between the first, second, third, and fourth edges, the second arcuate blade having a shape and circumferential length to surround a second portion of the first ductile iron pipe and slide between the outer surface of the first ductile iron pipe and the inner surface of the second ductile iron pipe to disengage the teeth of a second portion of the gasket from the outer surface of the first ductile iron pipe, the second arcuate blade having a circumferential length to define third and fourth excess portions on the first and second ends of the second arcuate blade that overlap the first and second excess portions of the first arcuate blade when the first and second arcuate blades surround the first ductile iron pipe and the first and second arcuate blades are slid between the outer surface of the first ductile iron pipe and the inner surface of the second ductile iron pipe;
• and
• (ii) a second driving member portion extending radially outward from the second arcuate blade, the second driving member having an inner circumferential length less than the circumferential length of the second arcuate blade to define the third and fourth excess portions of the second arcuate blade.

A method for disengaging a first ductile iron pipe received within an open end of a second ductile iron pipe the method comprising:

• (a) providing a first ductile iron pipe received within an open end of a second ductile iron pipe with a gasket disposed between the first and second ductile iron pipes, the first ductile iron pipe having an outer surface defining an outer circumference and the second ductile iron pipe having an inner surface defining an inner circumference, wherein the gasket has an annular elastomeric body with a circumference sized to be disposed between the first and second ductile iron pipes and a plurality of metal segments extending radially inward from the annular elastomeric body, each metal segment including a plurality of teeth angled away from the open end of the second ductile iron pipe that are engageable with the outer surface of the first ductile iron pipe to prevent the first ductile iron pipe from being pulled axially outward from within the second ductile iron pipe;
• (b) providing a ductile iron pipe extracting tool having first and second tool pieces, each tool piece comprising:
• (i) an arcuate blade having first and second unbroken, continuous, straight edges and third and fourth unbroken, continuous, straight edges that are substantially transverse to the first and second unbroken, continuous, straight edges, the arcuate blade comprising a material that extends continuously between the first, second, third, and fourth edges, the arcuate blade having a shape and circumferential length to surround a portion of the first ductile iron pipe and slide between the outer surface of the first ductile iron pipe and the inner surface of the second ductile iron pipe to disengage a portion of the teeth of the gasket from the outer surface of the first ductile iron pipe, the arcuate blade having a circumferential length to define first and second excess portions on the first and second ends of the arcuate blade;
• (ii) a driving member portion extending radially outward from the arcuate blade, the driving member portion extending axially along a portion of the arcuate blade to define a driving member thickness substantially greater than the thickness of the arcuate blade, the driving member having an inner circumferential length less than a circumferential length of the arcuate blade to define the first and second excess portions of the arcuate blade;
• (b) engaging the arcuate blade of the first tool piece with the outer surface of a first portion of the first ductile iron pipe;
• (c) engaging the arcuate blade of the second tool piece with the outer surface of a second portion of the first ductile iron pipe such that the first and second excess portions of the second tool piece overlap the first and second excess portions of the first tool piece;
• (d) applying a force against the driving member portions of the first and second tool pieces to drive the arcuate blade of the first and second tool pieces between the first and second ductile iron pipes to disengage the teeth of the gasket from the outer surface of the first ductile iron pipe;
• and
• (e) pulling the first ductile iron pipe axially outward until the first ductile iron pipe is no longer received within the second ductile iron pipe.

A ductile iron pipe extracting tool for use with a first ductile iron pipe received within an open end of a second ductile iron pipe with a gasket disposed between the first and second ductile iron pipes, the first ductile iron pipe having an outer surface defining an outer circumference and the second ductile iron pipe having an inner surface defining an inner circumference, wherein the gasket has an annular elastomeric body with a circumference sized to be disposed between the first and second ductile iron pipes and a plurality of metal segments extending radially inward from the annular elastomeric body, each metal segment including a plurality of teeth angled away from the open end of the second ductile iron pipe that are engageable with the outer surface of the first ductile iron pipe to prevent the first ductile iron pipe from being pulled axially outward from within the second ductile iron pipe, the ductile iron pipe extracting tool comprising:

• (a) an arcuate blade having a circumferential length extending between first and second unbroken, continuous, straight edges and an axial length extending between third and fourth unbroken, continuous, straight edges, wherein the third and fourth unbroken, continuous, straight edges are substantially transverse to the first and second unbroken, continuous, straight edges, and wherein the arcuate blade comprises a material that extends continuously between the first, second, third, and fourth edges, the arcuate blade being sized and shaped to completely surround the outer circumference of the first ductile iron pipe and slide between the outer surface of the first ductile iron pipe and the inner surface of the second ductile iron pipe to disengage the teeth of the gasket from the outer surface of the first ductile iron pipe;
• and
• (b) a driving member portion extending radially outward from the arcuate blade.

A ductile iron pipe extracting tool kit for use with a first ductile iron pipe having an outer surface defining an outer circumference and a second ductile iron pipe having an inner surface defining an inner circumference, the first ductile iron pipe received within an open end of the second ductile iron pipe with a gasket disposed between the outer surface of the first ductile iron pipe and the inner surface of the second ductile iron pipe, wherein the gasket has an annular elastomeric body with a circumference sized to be disposed between the first and second ductile iron pipes and a plurality of metal segments extending radially inward from the annular elastomeric body, each metal segment including a plurality of teeth angled away from the open end of the second ductile iron pipe that are engageable with the outer surface of the first ductile iron pipe to prevent the first ductile iron pipe from being pulled axially outward from within the second ductile iron pipe, the ductile iron pipe extracting tool kit comprising:

• (a) a first tool piece, comprising:
• (i) a first arcuate blade having a circumferential length extending between first and second unbroken, continuous, straight edges and an axial length extending between third and fourth unbroken, continuous, straight edges, wherein the third and fourth unbroken, continuous, straight edges are substantially transverse to the first and second unbroken, continuous, straight edges, and wherein the arcuate blade comprises a material that extends continuously between the first, second, third, and fourth edges, the first arcuate blade having a shape and circumferential length to surround a first portion of the outer circumference of the first ductile iron pipe and slide between the outer surface of the first ductile iron pipe and the inner surface of the second ductile iron pipe to disengage the teeth of a first portion of the gasket from the outer surface of the first ductile iron pipe;
• (ii) a first driving member portion extending radially outward from the first arcuate blade;
• (b) a second tool piece, comprising:
• (i) a second arcuate blade having a circumferential length extending between first and second unbroken, continuous, straight edges and an axial length extending between third and fourth unbroken, continuous, straight edges, wherein the third and fourth unbroken, continuous, straight edges are substantially transverse to the first and second unbroken, continuous, straight edges, and wherein the second arcuate blade comprises a material that extends continuously between the first, second, third, and fourth edges, the second arcuate blade having a shape and circumferential length to surround a second portion of the first ductile iron pipe and slide between the outer surface of the first ductile iron pipe and the inner surface of the second ductile iron pipe to disengage the teeth of a second portion of the gasket from the outer surface of the first ductile iron pipe;
• and
• (ii) a second driving member portion extending radially outward from the second arcuate blade.

A method for disengaging a first ductile iron pipe received within an open end of a second ductile iron pipe, the method comprising:

• (a) providing a first ductile iron pipe received within an open end of a second ductile iron pipe with a gasket disposed between the first and second ductile iron pipes, the first ductile iron pipe having an outer surface defining an outer circumference and the second ductile iron pipe having an inner surface defining an inner circumference, wherein the gasket has an annular elastomeric body with a circumference sized to be disposed between the first and second ductile iron pipes and a plurality of metal segments extending radially inward from the annular elastomeric body, each metal segment including a plurality of teeth angled away from the open end of the second ductile iron pipe that are engageable with the outer surface of the first ductile iron pipe to prevent the first ductile iron pipe from being pulled axially outward from within the second ductile iron pipe;
• (b) providing a ductile iron pipe extracting tool having first and second tool pieces, each tool piece comprising:
• (i) an arcuate blade having first and second unbroken, continuous, straight edges and third and fourth unbroken, continuous, straight edges that are substantially transverse to the first and second unbroken, continuous, straight edges, the arcuate blade comprising a material that extends continuously between the first, second, third, and fourth edges, the arcuate blade having a shape and circumferential length to surround a portion of the first ductile iron pipe and slide between the outer surface of the first ductile iron pipe and the inner surface of the second ductile iron pipe to disengage all the teeth of a portion of the gasket having substantially the same circumferential length as the arcuate blade from the outer surface of the first ductile iron pipe;
• (ii) a driving member portion extending radially outward from the arcuate blade, the driving member portion extending axially along a portion of the arcuate blade to define a driving member thickness substantially greater than the thickness of the arcuate blade;
• (c) engaging the arcuate blade of the first tool piece with a first portion of the outer surface of the first ductile iron pipe;
• (d) engaging the arcuate blade of the second tool piece with a second portion of the outer surface of the exterior of the first ductile iron pipe;
• (e) applying a force against the driving member portion of the first and second tool pieces to drive the arcuate blade of the first and second tool pieces between the first and second ductile iron pipes to disengage the teeth of the gasket from the outer surface of the first ductile iron pipe;
• and
• (f) pulling the first ductile iron pipe axially outward until the first ductile iron pipe is no longer received within the second ductile iron pipe.