Fittings for joining lengths of pipe by a press-fit connection and pipe assembly formed using same

A pipe assembly comprising:

• a male fitting, comprising:
• a body having a radially outer surface and a radially inner surface;
• a distal end and a proximal end;
• and
• an alignment tooth oriented closest to the distal end on a removed portion of the radially outer surface, and at least one load tooth on the removed portion of the radially outer surface,
• wherein the alignment tooth includes, from an alignment tooth distal direction toward an alignment tooth proximal direction, a first axial surface parallel to an axial direction of the pipe assembly, a first ramped surface biased with respect to the axial direction, a second axial surface parallel to the axial direction, and a first radial surface parallel to a radial direction of the pipe assembly,
• wherein the at least one load tooth includes, from a load tooth distal direction toward a load tooth proximal direction, a third axial surface parallel to the axial direction, a second ramped surface biased with respect to the axial direction, a fourth axial surface parallel to the axial direction, and a second radial surface parallel to the radial direction,
• wherein the first axial surface, the second axial surface, the third axial surface, and the fourth axial surface each have a radial height measured from the radially inner surface, and wherein the radial height of the fourth axial surface is greater than the radial height of the second axial surface, the radial height of the second axial surface is greater than the radial height of the first axial surface, and the radial height of the first axial surface is greater than the radial height of the third axial surface, and
• wherein the first ramped surface is biased at an angle AM1 relative to the axial direction, the second ramped surface is biased at an angle AM2 relative to the axial direction, and wherein the angle AM1 is smaller than the angle AM2, and
• a female fitting, comprising:
• a body having a radially inner surface and a radially outer surface;
• a distal end and a proximal end;
• and
• an alignment cavity oriented closest to the proximal end on a removed portion of the radially inner surface, and at least one load cavity on the removed portion of the radially inner surface,
• wherein the alignment cavity includes, from an alignment cavity proximal direction toward an alignment cavity distal direction, a first axial surface parallel to the axial direction, a first ramped surface biased with respect to the axial direction, a second axial surface parallel to the axial direction, and a first radial surface parallel to the radial direction,
• wherein the at least one load cavity includes, from a load cavity proximal direction toward a load cavity distal direction, a third axial surface parallel to the axial direction, a second ramped surface biased with respect to the axial direction, a fourth axial surface parallel to the axial direction, and a second radial surface parallel to the radial direction,
• wherein the first axial surface, the second axial surface, the third axial surface, and the fourth axial surface each have a radial height measured from the radially outer surface, and wherein the radial height of the third axial surface is greater than the radial height of the first axial surface, the radial height of the first axial surface is greater than the radial height of the second axial surface, and the radial height of the second axial surface is greater than the radial height of the fourth axial surface, and
• wherein the first ramped surface is biased at an angle AF1 relative to the axial direction, the second ramped surface is biased at an angle AF2 relative to the axial direction, and wherein the angle AF1 is smaller than the angle AF2, and
• when the male fitting is fully engaged with the female fitting, the alignment tooth fits within the alignment cavity, and the load tooth fits within the load cavity.