Duct terminator

Claim 2

Duct terminator apparatus to be positioned in the concrete wall of an underground vault or the like at which a plurality of ducts are to terminate, said apparatus being positioned in the form used to shape said wall and said apparatus comprising: a plurality of terminator modules each including respective pairs of barrier walls spaced apart at a distance corresponding substantially to the thickness of said concrete wall and formed at their one extremities with respective female flanges and at their opposite extremities with male flanges for interfitting the female flanges of adjacent modules, each of said modules further including receptacles extending between said barrier walls to form through passages from one of said barrier walls to the other, and with said modules being assembled by interfitting the male and female flanges of adjacent modules whereby concrete poured between said vertical walls during pouring of said vault will position said modules in said vertical walls to form spaced passages for receipt of the extremities of said ducts.

Claim 3

A duct terminator apparatus as set forth in claim 1 wherein: the intermediate portion of each of said receptacles are formed with peripheral shoulders for abutment with the extremities of the respective ducts.

Claim 4

A duct terminator apparatus as set forth in claim 1 wherein: each of said receptacles if formed with a frustoconical shaped portion defining a passage which progressively decreases in cross-sectional area toward the wall opposite to the wall from which said ducts enter to assist in leading said ducts thereinto.

Claim 5

A duct terminator apparatus as set forth in claim 1 wherein: said receptacles are disposed in spaced-apart relationship for receiving concrete reinforcing bars therebetween.

Claim 6

A duct terminator apparatus as set forth in claim 2 wherein: said receptacles are disposed in spaced-apart relationship for receiving horizontal and vertical concrete reinforcing bars therebetween.

Claim 7

A duct terminator apparatus as set forth in claim 1 wherein: said passages flare radially outwardly away from the wall through which said ducts enter to provide tapered surfaces over which conduits fed through said ducts may ride.

Claim 8

A duct terminator apparatus as set forth in claim 1 wherein: certain of said modules include receptacles formed with passages having a selected cross-section and in other of said modules the receptacles thereof are formed with passages having a second cross-section.

Claim 9

A duct terminator apparatus as set forth in claim 1 wherein: said female flanges are in the form of grooves and said male flanges are in the form of tongues for interlocking in said respective grooves.

Claim 10

A duct terminator apparatus as set forth in claim 8 wherein: the grooves forming said female flanges are elongated whereby said tongues may be shifted longitudinally therein to re-position the receptacles of certain modules with respect To the receptacles in other modules.

Claim 11

A duct terminator to be positioned in the concrete wall of an underground vault or the like at which the duct is to terminate, said duct terminator being positioned in the form used to shape said wall, and said duct terminator comprising: a pair of barrier walls spaced apart at a distance substantially corresponding to the thickness of said concrete wall for receipt of concrete therebetween; receptacle means extending between said barrier walls and forming through passage means from one of said barrier walls to the other of said barrier walls, the ends of said receptacle means being integral with said barrier walls whereby said terminator may be positioned in said form and concrete poured into said form to provide a concrete wall having passage means extending therethrough for receipt of the said duct; and with the intermediate portion of said receptacle means being formed with a peripheral shoulder for abutment with the extremities of said duct, said receptacle means being provided with a radially outwardly extending flare at its end opposite the end from which said duct is received.

Claim 12

A duct terminator to be positioned in the concrete wall of an underground vault or the like at which the duct is to terminate, said duct terminator being positioned in the form used to shape said wall, and said duct terminator comprising: a pair of barrier walls spaced apart at a distance substantially corresponding to the thickness of said concrete wall for receipt of concrete therebetween; receptacle means extending between said barrier walls and forming through passage means from one of said barrier walls to the other of said barrier walls, the ends of said receptacle means being integral with said barrier walls whereby said terminator may be positioned in said form and concrete poured into said form to provide a concrete wall having passage means extending therethrough for receipt of the said duct; and with the intermediate portion of said receptacle means being formed with a peripheral shoulder for abutment with the extremities of said duct, said receptacle means being provided with a radially outwardly extending flare at its end opposite the end from which said duct is received.

Claim 13

A duct terminator as set forth in claim 10 wherein: said receptacle means includes a web normally blocking communication through said passage means and which may be removed before said duct is installed.

Claim 14

A duct terminator as set forth in claim 10: wherein the edges of said barrier walls are formed with complementarily interfitting connection means whereby a plurality of said duct terminators may be coupled together.

Claim 15

A duct terminator as set forth in claim 10: which further includes cap means removably secured to said barrier walls to selectively block communication through said passage means.

Claim 16

Duct terminator apparatus to be positioned in the concrete wall of an underground vault or the like at which a plurality of ducts are to terminate, said apparatus being positioned in the form used to shape said wall and said apparatus comprising: a plurality of like terminator modules each including respective pairs of barrier walls spaced apart at a distance corresponding substantially to the thickness of said concrete wall and formed at their edges with complementary male and female flanges and grooves for coupling said edges together, each of said modules further including a receptacle extending between said barrier walls to form a through passage from one of said barrier walls to the other, and with said modules being assembled by interfitting the male and female flanges of adjacent modules whereby concrete poured between said vertical walls during pouring of said vault will position said modules in said vertical walls to form spaced passages for receipt of the extremities of said ducts.

Claim 17

Duct terminator apparatus to be positioned in the concrete wall of an underground vault or the like at which a plurality of ducts are to terminate, said apparatus being positioned in the form used to shape said wall and said apparatus comprising: a plurality of like terminator modules each including respective pairs of barrier walls spaced apart at a distance corresponding substantially to the thickness of said concrete wall and formed at their edges with complementary male and female flanges and grooves for coupling said edges together, each of said modules further including a receptacle extending between said barrier walls to form a through passage from one of said barrier walls to the other, and with said modules being assembled by interfitting the male and female flanges of adjacent modules whereby concrete poured between said vertical walls during pouring of said vault will position said modules in said vertical walls to form spaced passages for receipt of the extremities of said ducts.

Claim 18

A duct terminator apparatus as set forth in claim 14: which further includes cap means removably secured to said barrier walls to selectively block communication through said passage means.