Abstract: A locking segment is disclosed herein for restraining an outer surface of a spigot of a first pipe to a bell of a second pipe. The locking segment may have a body with an upper surface for contacting the socket of the bell at a contact point, a lower surface with teeth for contacting the outer surface of the spigot, a juncture of the rear side and the lower surface defining a reference point, and a hole extending through a centroid of the body. The upper surface of the locking segment is a logarithmic spiral curved such that a line connecting the contact point to the reference point proximately intersects the centroid. An apparatus can include multiple of the locking segments disposed upon a ring passing through the hole in each of the segments, such that each segment may pivot about the ring.

Abstract: A pipe joint having a compound locking ring is disclosed herein. The pipe joint bell has a segment cavity into which ring segments may be inserted through a slot on the face or outer surface of the bell end of a first pipe. The locking ring has multiple ring segments, each segment having an arcuate outer surface. The outer surface may be a compound surface of multiple arcs.

Abstract: A pipe joint having a compound locking ring is disclosed herein. The pipe joint bell has a segment cavity into which ring segments may be inserted through a slot on the face or outer surface of the bell end of a first pipe. The locking ring has multiple ring segments, each segment having an arcuate outer surface. The outer surface may be a compound surface of multiple arcs.

Abstract: A part of a gasket that conducts electricity across the otherwise nonconducting gasket. Versions of the insert provide an electrical connection when installed even if the parts sealed by the gasket deflect, and do not deform under compression due to their resilient nature. The gaskets can be used in pipe joints, among other uses, resulting in a pipe joint that conducts electricity between the pipe spigot and the socket of a pipe or fixture even if a deflection event occurs.

Abstract: A pipe joint having a compound locking ring is disclosed herein. The pipe joint bell has a a segment cavity into which ring segments may be inserted through a slot on the face or outer surface of the bell end of a first pipe. The locking ring has multiple ring segments, each segment having an arcuate outer surface. The outer surface may be a compound surface of multiple arcs.

Abstract: A pipe joint having a compound locking ring is disclosed herein. The pipe joint bell has a a segment cavity into which ring segments may be inserted through a slot on the face or outer surface of the bell end of a first pipe. The locking ring has multiple ring segments, each segment having an arcuate outer surface. The outer surface may be a compound surface of multiple arcs.

Abstract: A part of a gasket that conducts electricity across the otherwise nonconducting gasket. Versions of the insert provide an electrical connection when installed even if the parts sealed by the gasket deflect, and do not deform under compression due to their resilient nature. The gaskets can be used in pipe joints, among other uses, resulting in a pipe joint that conducts electricity between the pipe spigot and the socket of a pipe or fixture even if a deflection event occurs.

Abstract: A part of a gasket that conducts electricity across the otherwise nonconducting gasket. Versions of the insert provide an electrical connection when installed even if the parts sealed by the gasket deflect, and do not deform under compression due to their resilient nature. The gaskets can be used in pipe joints, among other uses, resulting in a pipe joint that conducts electricity between the pipe spigot and the socket of a pipe or fixture even if a deflection event occurs.

Abstract: A part of a gasket that conducts electricity across the otherwise nonconducting gasket. Versions of the insert provide an electrical connection when installed even if the parts sealed by the gasket deflect, and do not deform under compression due to their resilient nature. The gaskets can be used in pipe joints, among other uses, resulting in a pipe joint that conducts electricity between the pipe spigot and the socket of a pipe or fixture even if a deflection event occurs.