Emission-free exhaust pipe joint and clamp therefor

Claim 2

A clamped joint for use in internal combustion engine exhaust systems which comprises: A. a joint formed of a pair of pipes, each pipe having a bead formation at an end thereof, the bead formations including respective axially facing flange surfaces and the flange surfaces being substantially abutted face to face, B. a pipe clamp engaged over the bead formations and constricted thereon, the clamp having radially inwardly facing groove means along its inner surface with opposite surfaces of the groove means engaging the bead formations and applying wedging forces on said bead means causing the flange surfaces to be forced axially together, C. the clamp being formed of two generally semi-circular halves, each half having a substantially radially outwardly extending tongue on one end thereof with the tongues spaced apart and having cooperating fastening means for bringing the tongues together in securing the clamp to the joint, each half having a medial section provided with said groove means, and the second end of each half having cooperating formations providing a separable hinge connection thereat, D. said cooperating formations comprising an open bight on one of said second ends and a tab on the other of said second ends, the tab lying in the bight engaged against one side of said bight in surface engagement only, E. said bight being generally rectangular in configuration and having a pair of planar portions spaced apart, one planar portion extending substantially radially outwardly of the clamp and the other being parallel thereto, a bridge connecting the planar portions, said other planar portion having a free end, the said tab extending substantially radially outwardly of the clamp and being disposed in facing engagement with the inside of said other planar portion, F. said tongues having aligned perforations and said fastening means comprising a bolt extending through said perforations generally tangential to said clamp, one of said tongues having a right angle bent flange adapted to limit movement of the tongues toward one another.

Claim 3

A clamped joint for use in internal combustion engine exhaust systems which comprises: A. a joint formed of a pair of pipes, each pipe having a bead formation at an end thereof, the bead formations including respective axially facing flange surfaces and the flange surfaces being substantially abutted face to face, B. a pipe clamp engaged over the bead formations and constricted thereon, the clamp having radially inwardly facing groove means along its inner surface with opposite surfaces of the groove means engaging the bead formations and applying wedging forces on said bead means causing the flange surfaces to be forced axially together, C. one pipe of said joint having its bead formation spaced from the free end of said one pipe whereby to form a pilot extension, said pilot extension being telescoped within the other pipe to bring the bead formations together, D. the clamp being formed of two generally semi-circular halves, each half having a substantially radially outwardly extending tongue on one end thereof with the tongues spaced apart and having cooperating fastening means for bringing the tongues together in securing the clamp to the joint, each half having a medial section provided with said groove means, and the second end of each half having cooperating formations providing a separable hinge connection thereat, E. said cooperating formations comprising an open bight on one of said second ends and a tab on the other of said second ends, the tab lying in the bight engaged against one side of said bight in surface engagement only, F. said bight being generally rectangular in configuration and having a pair of planar portions spaced apart, one planar portion extending substantially radially outwardly of the clamp and the other being parallel thereto, a bridge connecting the planar portions, said other planar portion having a free end, the said tab extending substantially radially outwardly of the clamp and being disposed in facing engagement with the inside of said other planar portion, G. said tongues having aligned perforations and said fastening means comprising a bolt extending through said performations generally tangential to said clamp, one of said tongues having a right angle bent flange adapted to limit movement of the tongues toward one another.

Claim 4

A clamped joint for use in internal combustion engine exhaust systems which comprises: A. a joint formed of a pair of pipes, each pipe having a bead formation at an end thereof, the bead formations including respective axially facing flange surfaces and the flange surfaces being substantially abutted face to face, B. a pipe clamp engaged over the bead formations and constricted thereon, the clamp having radially inwardly facing groove means along its inner surface with opposite surfaces of the groove means engaging the bead formations and applying wedging forces on said bead means causing the flange surfaces to be forced axially together, C. one pipe of said joint having its bead formation spaced from the free end of said one pipe whereby to form a pilot extension, said pilot extension being telescoped within the other pipe to bring the bead formations together, D. the clamp being formed of two generally semi-circular halves, each half having a substantially radially outwardly extending tongue on one end thereof with the tongues spaced apart and having cooperating fastening means for bringing the tongues together in securing the clamp to the joint, each half having a medial section provided with said groove means, and the second end of each half having cooperating formations providing a separable hinge connection thereat, E. said cooperating formations comprising an open bight on one of said second ends and a tab on the other of said second ends, the tab lying in the bight engaged against one side of said bight in surface engagement only, F. said bight being generally rectangular in configuration and having a pair of planar portions spaced apart, one planar portion extending substantially radially outwardly of the clamp and the other being parallel thereto, a bridge connecting the planar portions, said other planar portion having a free end, the said tab extending substantially radially outwardly of the clamp and being disposed in facing engagement with the inside of said other planar portion, G. said tongues having aligned perforations and said fastening means comprising a bolt extending through said performations generally tangential to said clamp, one of said tongues having a right angle bent flange adapted to limit movement of the tongues toward one another.

Claim 5

A clamp for a pipe joint of the type which has a pair of side by side beads adapted to be forced against one another axially, said clamp comprising: A. a pair of independent generally semi-circular halves, B. each half having a first end and a second end and a medial section between the ends, the medial section having a generally arcuate cross-section to form inner groove means adapted to be engaged upon the side by side beads, C. a generally radially extending tongue on each first end, the tongues being spaced apart and having cooperating fastening means associated therewith to bring the tongues together in constricting the clamp, D. the second ends having cooperating formations providing a separable hinge joint thereat, E. said cooperating formations comprising an open bight on one of said second ends and a tab on the other of said second ends, the tab lying in the bight engaged against one side of the bight in surface engagement only, F. said bight being generally rectangular in configuration and having a pair of planar portions spaced apart, one planar portion extending substantially radially outwardly of the clamp and the other being parallel thereto, a bridge connecting the planar portions, said other planar portion having a free end, the said tab extending substantially radially outwardly of the clamp and being disposed in facing engagement with the inside of the said other planar portion, G. one of said tongues having a right angle bent flange directed toward the other tongue and adapted to limit movement of the tongues toward one another.

Claim 6

A clamp for a pipe joint of the type which has a pair of side by side beads adapted to be forced against one another axially, said clamp comprising: A. a pair of independent generally semi-circular halves, B. each half having a first end and a second end and a medial section between the ends, the medial section having a generally arcuate cross-section to form inner groove means adapted to be engaged upon the side by side beads, C. a generally radially extending tongue on each first end, the tongues being spaced apart and having cooperating fastening means associated therewith to bring the tongues together in constricting the clamp, D. the second ends having cooperating formations providing a separable hinge joint thereat, E. said cooperating formations comprising an open bight on one of said second ends and a tab on the other of said second ends, the tab lying in the bight engaged against one side of the bight in surface engagement only, F. said bight being generally rectangular in configuration and having a pair of planar portions spaced apart, one planar portion extending substantially radially outwardly of the clamp and the other being parallel thereto, a bridge connecting the planar portions, said other planar portion having a free end, the said tab extending substantially radially outwardly of the clamp and being disposed in facing engagement with the inside of the said other planar portion, G. one of said tongues having a right angle bent flange directed toward the other tongue and adapted to limit movement of the tongues toward one another.

Claim 7

The clamp as claimed in claim 3 in which said tongues have aligned perforations and said fastening means comprise a bolt extending through said perforations generally tangential to said clamp.

Claim 8

A clamped joint comprising: A. a pair of pipes, each pipe having a rolled end forming a beaded formation directly thereon at an end thereof, said beaded formation each including respective axially facing flange surfaces, said flange surfaces being substantially abutted in face-to-face contact, and B. a pipe clamp formed of two generally semi-circular bands each formed of a single piece and each having a semi-circular medial portion and two end poritions extending respectively outwardly from said medial portion, the medial portion of each band having an arcuate cross-section and radially outwardly facing groove means along its inner surface with opposite surfaces of said groove means engaging the beaded formation and forming wedge portions tangentially engaging only at one point the surface of the rolled ends forming said beaded formation to apply a wedging force thereto to force the flange surfaces axially together, and fastening means cooperating with said respective end portions of said two semi-circular bands to secure the two semi-circular bands in tight fitting engagement over said band formations.

Claim 9

A clamped joint comprising: A. a pair of pipes, each pipe having a rolled end forming a beaded formation directly thereon at an end thereof, said beaded formation each including respective axially facing flange surfaces, said flange surfaces being substantially abutted in face-to-face contact, and B. a pipe clamp formed of two generally semi-circular bands each formed of a single piece and each having a semi-circular medial portion and two end poritions extending respectively outwardly from said medial portion, the medial portion of each band having an arcuate cross-section and radially outwardly facing groove means along its inner surface with opposite surfaces of said groove means engaging the beaded formation and forming wedge portions tangentially engaging only at one point the surface of the rolled ends forming said beaded formation to apply a wedging force thereto to force the flange surfaces axially together, and fastening means cooperating with said respective end portions of said two semi-circular bands to secure the two semi-circular bands in tight fitting engagement over said band formations.

Claim 10

The clamped joint as claimed in claim 5 in which one pipe of the joint has its bead formation spaced from the free end of said one pipe whereby to form a pilot extension, said pilot extension being telescoped within the other pipe to bring the bead formations together.

Claim 11

The clamped joint as claimed in claim 6 in which the pipes are of the same outer and inner diameters and the pilot extension is formed as a smaller diameter neck to enable its outer diameter to engage within the other pipe.

Claim 12

The clamped joint as claimed in claim 6 in which the pipe having the pilot extension is of an outer diameter substantially the same as the inner diameter of the other pipe.

Claim 13

The clamped joint as claimed in claim 5 in which each said semi-circular band has a substantially radially outwardly extending tongue on one end thereof with the tongues spaced apart and having cooperating fastening means for bringing the tongues together in securing the clamp to the joint, each semi-circular band having a medial section provide with said groove means, and the second end of each semi-circular band having cooperating formations providing a separable hinge connection thereat.

Claim 14

The clamped joint as claimed in claim 9 in which said cooperating formations comprise an open bight on one of said second ends and a tab on the other of said second ends, the tab lying in the bight engaged against one side of said bight in surface engagement only.

Claim 15

The clamped joint as claimed in claim 10 in which said bight is generally rectangular in configuration and has a pair of planar portions spaced apart, one planar portion extending substantially radially outwardly of the clamp and the other being parallel thereto, a bridge connecting the planar portions, said other planar portion having a free end, the said tab extending substantially radially outwardly of the clamp and being disposed in facing engagement with the inside of said other planar portion.