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A system of flexible conduit and fittings useful particularly, though not exclusively, for conveying, supporting and connecting electrical service cables and wires. The system includes a corrugated, synthetic resin conduit which is flexible and mechanically strong, connector sleeves for clampingly e

A system of flexible conduit and fittings useful particularly, though not exclusively, for conveying, supporting and connecting electrical service cables and wires. The system includes a corrugated, synthetic resin conduit which is flexible and mechanically strong, connector sleeves for clampingly engaging sections of the corrugated conduit in end-to-end relation, and hanger sleeves for clampingly engaging the conduit and suspending it from a wall or similar surface. A novel electrical outlet box is provided and includes internally toothed conduit-receiving inlet fittings for securely engaging an end of the conduits in inlets to the box.

대표청구항 ▼

An inlet fitting for engaging a corrugated tubing section to an electrical box having an opening in a side wall thereof comprising: a generally cylindrical body severed along parallel, axially extending lines to define a pair of opposed clamping portions of arcuate cross-sectional configuration pivo

An inlet fitting for engaging a corrugated tubing section to an electrical box having an opening in a side wall thereof comprising: a generally cylindrical body severed along parallel, axially extending lines to define a pair of opposed clamping portions of arcuate cross-sectional configuration pivotable radially outwardly relative to the axis of the cylindrical body, said cylindrical body further including a medial cylindrical body portion having one side connected to one of the ends of each of said clamping portions, and having an opposite side, each of said clamping portions including: a plurality of axially spaced, radially inwardly extending teeth projecting toward the axis of the cylindrical body from the radially inner side of the respective clamping portion; a hinge section of radially reduced thickness adjacent said medial cylindrical body portion and connecting said one end of the respective clamping portion to said cylindrical body portion to hingedly interconnect the respective clamping portion to the medial cylindrical body portion for radial pivotation of the respective clamping portion about said hinge section of radially reduced thickness; a free end opposite said one end of the respective clamping portion; an inclined surface sloping radially outwardly from a relatively thin radial section to a relatively thick radial section in an axial direction from a location adjacent said hinge section toward the free end of the respective clamping portion, said inclined surface terminating in a first radially extending shoulder spaced axially from the free end of the respective clamping portion and spaced axially from said teeth toward said hinge section; and a radially outwardly projecting end portion of the respective clamping portion adjacent the free end thereof spaced from said shoulder and defining with said shoulder a locking collar-receiving recess extending transversely across the clamping portion, said recess having a bottom which is in coplanar alignment with the external surface of said generally cylindrical body; a cylindrical nipple of smaller diameter than said cylindrical body; a second radially extending shoulder extending between, and interconnecting, one end of said nipple with a side of said cylindrical body opposite the side thereof connected to said clamping portions; and an annular locking collar having a greater internal diameter than the outer diameter of said cylindrical body mounted on, and surrounding, said cylindrical body, and axially slidable on said cylindrical body to a position around said clamping portions in which said locking collar is retained in said recesses to retain said clamping portions in a conduit-engaging position extending parallel to the axis of the cylindrical body, said annular locking collar including a radially inner surface adapted to cooperate with said inclined surface to allow said locking collar to be slid over said inclined surface as said locking collar is moved axially from a location adjacent said second radially extending shoulder, across said inclined surface, into the recesses of said clamping portions.