Tool for forming asbestos linings and the like

Claim 2

A tool for forming compactable plastic material into a lining around the interior of a cylindrical chamber, comprising: a generally cylindrical body having a first end and a second end and being of a size to be rotated and moved lengthwise through the chamber with the second end following the first end, at least a portion of the outer periphery of the body having a radius progressively increasing in a circumferential direction from a smaller radius to a radius substantially equal to the radius of the inner diameter of the lining to be formed, said increase in radius being in a direction opposite to the direction of rotation of the tool; a drive pipe connected to the body for rotating the body, moving the body through the chamber and supplying the plastic material to the body; and means carried by the body in communication with the drive pipe for depositing the plastic material between the first end of the body and the inner periphery of the chamber, whereby the material will be forced radially outwardly against the inner periphery of the cylindrical chamber by the outer periphery of the body as the body is turned and moved lengthwise through the chamber.

Claim 3

A tool as defined in claim 1 wherein the outer periphery of the body is tapered inwardly to a smaller diameter from the medial portion of the body to the first end of the body.

Claim 4

A tool as defined in claim 2 wherein the outer periphery of the body is tapered inwardly to a smaller diameter from a medial portion of the body to the second end of the body.

Claim 5

A tool for forming compactable plastic material into a lining around the interior of a cylindrical chamber, comprising: a generally cylindrical body having a first end and a second end and being of a size to be rotated and moved lengthwise through chamber with the second end trailing the first end, the outer periphery of the body being shaped to provide a plurality of surfaces arranged side-by-side circumferentially around the body, each of said surfaces being of a progressively increased radius from one side thereof to the opposite side thereof relative to the center line of the body, said surfaces being arranged with the smallest radius side thereof adjacent to the largest radius side of the next surface around the body in the direction the body is to be rotated and said surfaces being tapered radially inward from the medial portion of the body to the first end of the body; a drive pipe connected to the body for rotating the body, moving the body through the chamber and supplying the plastic material to the body, and means carried by the body in communication with the drive pipe for depositing the plastic material between the first end of the body and the inner periphery of the chamber, in a position to be compacted against said inner periphery by said surfaces as the tool is rotated and moved lengthwise through the chamber.

Claim 6

A tool for forming compactable plastic material into a lining around the interior of a cylindrical chamber, comprising: a generally cylindrical body having a first end and a second end and being of a size to be rotated and moved lengthwise through chamber with the second end trailing the first end, the outer periphery of the body being shaped to provide a plurality of surfaces arranged side-by-side circumferentially around the body, each of said surfaces being of a progressively increased radius from one side thereof to the opposite side thereof relative to the center line of the body, said surfaces being arranged with the smallest radius side thereof adjacent to the largest radius side of the next surface around the body in the direction the body is to be rotated and said surfaces being tapered radially inward from the medial portion of the body to the first end of the body; a drive pipe connected to the body for rotating the body, moving the body through the chamber and supplying the plastic material to the body, and means carried by the body in communication with the drive pipe for depositing the plastic material between the first end of the body and the inner periphery of the chamber, in a position to be compacted against said inner periphery by said surfaces as the tool is rotated and moved lengthwise through the chamber.

Claim 7

A tool for forming compactable plastic material into a lining around the interior of a cylindrical chamber, comprising: a generally cylindrical body having a first end and a second end and being of a size to be rotated and moVed lengthwise through the chamber with the second end trailing the first end, the outer periphery of the body being shaped to provide a plurality of surfaces arranges side-by-side circumferentially around the body, each of said surfaces being of a progressively increased radius from one side thereof to the opposite side thereof relative to the center line of the body, said surfaces being arranged with the smallest radius side thereof adjacent to the largest radius side of the next surface around the body in the direction the body is to be rotated, and said surfaces being tapered radially inward from the medial portion of the body to the first end of the body; a drive pipe connected to the body for rotating the body, moving the body through the chamber and supplying the plastic material to the body; and a feed nozzle at the first end of the body at the smallest radius side of each of said surfaces in communication with the drive pipe to direct streams of the plastic material radially outward toward the walls of the chamber through which the tool is moved in a position to be compacted against said walls by said surfaces as the tool is rotated and moved lengthwise through the chamber.

Claim 8

A tool for forming compactable plastic material into a lining around the interior of a cylindrical chamber, comprising: a generally cylindrical body having a first end and a second end and being of a size to be rotated and moVed lengthwise through the chamber with the second end trailing the first end, the outer periphery of the body being shaped to provide a plurality of surfaces arranges side-by-side circumferentially around the body, each of said surfaces being of a progressively increased radius from one side thereof to the opposite side thereof relative to the center line of the body, said surfaces being arranged with the smallest radius side thereof adjacent to the largest radius side of the next surface around the body in the direction the body is to be rotated, and said surfaces being tapered radially inward from the medial portion of the body to the first end of the body; a drive pipe connected to the body for rotating the body, moving the body through the chamber and supplying the plastic material to the body; and a feed nozzle at the first end of the body at the smallest radius side of each of said surfaces in communication with the drive pipe to direct streams of the plastic material radially outward toward the walls of the chamber through which the tool is moved in a position to be compacted against said walls by said surfaces as the tool is rotated and moved lengthwise through the chamber.

Claim 9

A tool as defined in claim 5 wherein the body includes four of said surfaces.

Claim 10

A tool as defined in claim 5 wherein said nozzles are disposed at an angle of about 45* to the center line of the body.

Claim 11

A tool as defined in claim 5 wherein each of said surfaces is also tapered radially inward from a medial portion of the body to a second end of the body.

Claim 12

A tool for forming compactable plastic material into a lining around the interior of a cylindrical chamber, comprising: a generally cylindrical body having a first end and a second end and being of a size to be rotated and moved lengthwise through the chamber with the second end trailing the first end, said body comprising a plurality of identical, circumferentially arranged and interconnected segments, the outer periphery of each of said segments being progressively increased in radius with respect to the center line of the body from one side to the opposite side thereof and with the smaller radius side of each segment being adjacent the larger radius side of the next adjacent segment in the direction of rotation of the tool, each of said segments also being tapered radially inward from the medial portion of the body to the first end of the body; a drive pipe connected to the body for rotating the body, moving the body through the chamber and supplying the plastic material to the body; and a feed nozzle at the first end of the body at the smallest radius side of each segment extending at an angle to the center line of the body in communication with the drive pipe to direct a stream of the plastic material radially outward from the body and toward an area opposite the medial portion of the body, whereby the material will be compacted against the walls of the chamber as the body is turned and moved lengthwise through the chamber.

Claim 13

A tool for forming compactable plastic material into a lining around the interior of a cylindrical chamber, comprising: a generally cylindrical body having a first end and a second end and being of a size to be rotated and moved lengthwise through the chamber with the second end trailing the first end, said body comprising a plurality of identical, circumferentially arranged and interconnected segments, the outer periphery of each of said segments being progressively increased in radius with respect to the center line of the body from one side to the opposite side thereof and with the smaller radius side of each segment being adjacent the larger radius side of the next adjacent segment in the direction of rotation of the tool, each of said segments also being tapered radially inward from the medial portion of the body to the first end of the body; a drive pipe connected to the body for rotating the body, moving the body through the chamber and supplying the plastic material to the body; and a feed nozzle at the first end of the body at the smallest radius side of each segment extending at an angle to the center line of the body in communication with the drive pipe to direct a stream of the plastic material radially outward from the body and toward an area opposite the medial portion of the body, whereby the material will be compacted against the walls of the chamber as the body is turned and moved lengthwise through the chamber.

Claim 14

A tool as defined in claim 9 wherein the body comprises four of said segments.

Claim 15

A tool as defined in claim 9 wherein each of said segments is also tapered radially inwardly from the medial portion of the body toward the second end of the body.

Claim 16

A tool as defined in claim 9 characterized further to include: a flow divider in the drive pipe; and a flexible conduit connecting the drive pipe at the location of the flow divider to each of the feed nozzles to conduct the plastic material from the drive pipe to the feed nozzles.

Claim 17

A tool as defined in claim 9 wherein the feed nozzles extend at an angle of about 45* to the centerline of the body.

Claim 18

A tool as defined in claim 9 wherein each of said segments comprises a quarter section of a pipe and plates interconnecting said sections at the first and second ends of the body in a non-symmetrical arrangement to provide said variations in said radii circumferentially arouNd the body.

Claim 19

A tool as defined in claim 14 characterized further to include reinforcing plates secured around the inner periphery of each of said sections.

Claim 20

A tool as defined in claim 9 characterized further to include a tubular shield secured to the first end of the body in alignment with the center line of the body and having an outer diameter substantially equal to the maximum diameter of the first end of the body.

Claim 21

A tool as defined in claim 16 characterized further to include a plurality of centralizers secured around the shield in spaced relation along the length of the shield sized to engage the surfaces of the chamber and retain the body centered in the chamber.

Claim 22

A tool as defined in claim 9 wherein each of said segments is a metal bar.

Claim 23

A tool as defined in claim 18 wherein said nozzles comprise ports formed in said bars.

Claim 24

A tool for forming compactable plastic material into a lining around the interior of a vertically oriented cylindrical chamber, comprising: a generally cylindrical body having an upper end and a lower end and being of a size to be rotated and moved upwardly through the chamber, the outer periphery of the body being shaped to provide a plurality of surfaces arranged side-by-side circumferentially around the body, each of said surfaces being of a progressively increased radius from one side thereof to the opposite side thereof relative to the center line of the body, said surfaces being arranged with the smallest radius side thereof adjacent to the largest radius side of the next surface around the body in the direction the body is to be rotated, and said surfaces being tapered radially inward from the medial portion of the body to the upper end of the body; and a distributing head supported above the body concentrically with the center line of the body, said head having a plurality of circumferentially spaced plastic material feed ports therein arranged to deposit the material evenly around the inner periphery of the chamber where the material will be compacted against said inner periphery of the body as the body is rotated and moved upwardly through the champer; wherein the head is supported from the body by a drive pipe and a tubular shield extending concentrically around the drive pipe between the head and the upper end of the body, said shield having an outer diameter substantially equal to the maximum outer diameter of the upper end of the body, and characterized further to include means forming passages from the upper end portion of the body below the shield through the shield and the head for the escape of fluid evolved during the compaction of the plastic material against the inner periphery of the chamber.

Claim 25

A tool for forming compactable plastic material into a lining around the interior of a vertically oriented cylindrical chamber, comprising: a generally cylindrical body having an upper end and a lower end and being of a size to be rotated and moved upwardly through the chamber, the outer periphery of the body being shaped to provide a plurality of surfaces arranged side-by-side circumferentially around the body, each of said surfaces being of a progressively increased radius from one side thereof to the opposite side thereof relative to the center line of the body, said surfaces being arranged with the smallest radius side thereof adjacent to the largest radius side of the next surface around the body in the direction the body is to be rotated, and said surfaces being tapered radially inward from the medial portion of the body to the upper end of the body; and a distributing head supported above the body concentrically with the center line of the body, said head having a plurality of circumferentially spaced plastic material feed ports therein arranged to deposit the material evenly around the inner periphery of the chamber where the material will be compacted against said inner periphery of the body as the body is rotated and moved upwardly through the champer; wherein the head is supported from the body by a drive pipe and a tubular shield extending concentrically around the drive pipe between the head and the upper end of the body, said shield having an outer diameter substantially equal to the maximum outer diameter of the upper end of the body, and characterized further to include means forming passages from the upper end portion of the body below the shield through the shield and the head for the escape of fluid evolved during the compaction of the plastic material against the inner periphery of the chamber.

Claim 26

A tool as defined in claim 20 wherein said feed ports are curved to eject the plastic material from the head in a direction generally opposite to the direction of rotation of the head.

Claim 27

A tool for forming compactable plastic material into a lining around the interior of a vertically oriented cylindrical chamber, comprising: a generally cylindrical body having an upper end and a lower end and being of a size to be rotated and moved upwardly through the chamber, said body comprising a plurality of identical, circumferentially arranged and interconnected segments, the outer periphery of each of said segments being progressively increased in radius with respect to the center line of the body from one side to the opposite side thereof and with the smaller radius side of each segment being adjacent the larger radius side of the next adjacent segment in the direction of rotation of the tool, each of said segments also being tapered radially inward from the medial portion of the body to the upper end of the body; a feed nozzle at the first end of the body adjacent the smallest radius side of each segment extending at an angle to the center line of the body to direct a stream of the plastic material radially outward from the body and toward an area opposite tHe medial portion of the body in a position to be compacted against the inner periphery of the chamber as the body is turned and moved upwardly through the chamber; a drive pipe secured to the upper end of the body for moving the body and supplying the plastic material to the nozzles; a distributing head interposed in the drive pipe above the body, said head having a plurality of circumferentially spaced plastic material feed ports therein communicating with the interior of the drive pipe to supply an additional quantity of the material to the chamber; and a tubular shield extending concentrically around the drive pipe between the head and the body and having an outer diameter substantially equal to the maximum outer diameter of the upper end of the body to direct said additional quantity of material between the body and the inner periphery of the chamber.

Claim 28

A tool for forming compactable plastic material into a lining around the interior of a vertically oriented cylindrical chamber, comprising: a generally cylindrical body having an upper end and a lower end and being of a size to be rotated and moved upwardly through the chamber, said body comprising a plurality of identical, circumferentially arranged and interconnected segments, the outer periphery of each of said segments being progressively increased in radius with respect to the center line of the body from one side to the opposite side thereof and with the smaller radius side of each segment being adjacent the larger radius side of the next adjacent segment in the direction of rotation of the tool, each of said segments also being tapered radially inward from the medial portion of the body to the upper end of the body; a feed nozzle at the first end of the body adjacent the smallest radius side of each segment extending at an angle to the center line of the body to direct a stream of the plastic material radially outward from the body and toward an area opposite tHe medial portion of the body in a position to be compacted against the inner periphery of the chamber as the body is turned and moved upwardly through the chamber; a drive pipe secured to the upper end of the body for moving the body and supplying the plastic material to the nozzles; a distributing head interposed in the drive pipe above the body, said head having a plurality of circumferentially spaced plastic material feed ports therein communicating with the interior of the drive pipe to supply an additional quantity of the material to the chamber; and a tubular shield extending concentrically around the drive pipe between the head and the body and having an outer diameter substantially equal to the maximum outer diameter of the upper end of the body to direct said additional quantity of material between the body and the inner periphery of the chamber.

Claim 29

A tool as defined in claim 22 characterized further to include means forming air passages from the outer periphery of the body below the nozzles to the interior of the shield and vertically through the head between said feed ports.