Auger conveyor

Claim 2

An auger conveyor comprising: a. an elongated cylindrical core tube composed of a spiral-wound strip and having a raised, spiral seam on its external surface; b. spiral flighting connected externally to the core tube and having a spiral inner edge parallel with and abutting the raised spiral seam of the tube; c. elongated housing means for the core tube and flighting assembly; and, d. drive means for rotating the core tube and flighting assembly relative to the housing to advance material therealong.

Claim 3

The invention defined in claim 1 wherein adjacent edges of the spiral-wound strip are overlapped and interlocked to form the spiral seam on the core tube.

Claim 4

The invention defined in claim 1 wherein the flighting is welded to the spiral seam on the core tube.

Claim 5

The invention defined in claim 1 wherein the housing means comprises an elongated cylindrical tube, the assembly being rotatable within the tube to advance material therethrough.

Claim 6

The invention defined in claim 4 wherein the housing tube is composed of a spiral-wound strip and has a raised, spiral seam on its internal surface extending in close proximity to the outer edge of the flighting and serving as a stripper therefor.

Claim 7

An auger conveyor comprising: a. a core tube composed of a spiral-wound strip, the adjacent edges of the strip being interconnected to form a spiral seam on the external surface of the tube; and b. external, spiral flighting having a spiral inner edge connected to the external surface of the tube and parallel with the spiral seam thereof.

Claim 8

An auger conveyor comprising: a. a core tube composed of a spiral-wound strip, the adjacent edges of the strip being interconnected to form a spiral seam on the external surface of the tube; and b. external, spiral flighting having a spiral inner edge connected to the external surface of the tube and parallel with the spiral seam thereof.

Claim 9

The invention defined in claim 6 wherein the inner spiral edge of the flighting adjoins the spiral seam of the tube.

Claim 10

The invention defined in claim 6 wherein the spiral seam of the core tube is raised from the external surface thereof and abuts the inner spiral edge of the flighting.

Claim 11

The invention defined in claim 6 further including housing means for the core tube and flighting assembly, the assembly being rotatable relative to the housing means to advance material therealong.

Claim 12

The invention defined in claim 9 wherein the housing means comprises a tube composed of a spiral-wound strip and having a raised, spiral seam on its internal surface extending in close proximity to the outer edge of the flighting.

Claim 13

The invention defined in claim 10 wherein the housing tube and core tube seams are wound in opposite directions.

Claim 14

An auger conveyor comprising: a pair of continuous members, the first member being a strip spirally wound about an axis to form a solid cylindrical core, and having its adjacent spiralled edges joined to one another at a continuous spiralled juncture projecting radially from the core, and the other member being a spiral flighting having an inner continuous spiral edge at the same pitch as said juncture and extending around the core adjacent said juncture; and fastening means between the flighting and core at the inner edge and juncture.

Claim 15

An auger conveyor comprising: a pair of continuous members, the first member being a strip spirally wound about an axis to form a solid cylindrical core, and having its adjacent spiralled edges joined to one another at a continuous spiralled juncture projecting radially from the core, and the other member being a spiral flighting having an inner continuous spiral edge at the same pitch as said juncture and extending around the core adjacent said juncture; and fastening means between the flighting and core at the inner edge and juncture.

Claim 16

An auger conveyor comprising: a strip spirally wound about an axis to form a solid cylindrical core, and having adjacent spiralled edges offset outwardly from the core and joined to one another to define a continuous spiralled juncture projecting radially from the core; a spiral flighting having an inner continuous spiral edge portion at the same pitch as said juncture and having a radial side thereof bearing against said juncture; and fastening means between the inner edge portion and said juncture.

Claim 17

An auger conveyor comprising: a strip spirally wound about an axis to form a solid cylindrical core, and having adjacent spiralled edges offset outwardly from the core and joined to one another to define a continuous spiralled juncture projecting radially from the core; a spiral flighting having an inner continuous spiral edge portion at the same pitch as said juncture and having a radial side thereof bearing against said juncture; and fastening means between the inner edge portion and said juncture.

Claim 18

The auger conveyor as set forth in claim 13 in which the juncture has a radial surface and said radial side of the inner edge portion engages it, and said radial surface is behind the inner edge portion with respect to the normal direction of movement of material by the auger conveyor.

Claim 19

An auger conveyor comprising: a first strip spirally wound about an axis to form a solid cylindrical core, and having adjacent spiralled edges offset outwardly from the core and joined to one another to define a continuous spiralled juncture projecting radially from the core; a second strip spirally wound about the aforesaid axis to form a solid cylinder concentric with and outward of the core; a spiral flighting having an inner continuous spiral edge portion at the same pitch as said juncture, the edge portion having a radial side thereof bearing against said juncture, the flighting further having an outer continuous spiral edge closely adjacent the internal surface of said cylinder; fastening means between the inner edge portion and said juncture; and drive means for rotating said core relative to the cylinder.

Claim 20

An auger conveyor comprising: a first strip spirally wound about an axis to form a solid cylindrical core, and having adjacent spiralled edges offset outwardly from the core and joined to one another to define a continuous spiralled juncture projecting radially from the core; a second strip spirally wound about the aforesaid axis to form a solid cylinder concentric with and outward of the core; a spiral flighting having an inner continuous spiral edge portion at the same pitch as said juncture, the edge portion having a radial side thereof bearing against said juncture, the flighting further having an outer continuous spiral edge closely adjacent the internal surface of said cylinder; fastening means between the inner edge portion and said juncture; and drive means for rotating said core relative to the cylinder.