Indian Head Inc.

Thyssen-bornemisza Inc.

Other

The Lamson & Sessions Co.

Tbg Inc.

Thyssen-bornemisza, Inc., (tbg Inc.)

Harold T Pate

Helmut P Fochler

Richard J Borsh

Glenn A Wozniak

Robert R Rady

William R Laney

Robert W Ripley

Steve W Neff

Donald H Shell

Steven W Neff

A synthetic resin pipe which includes two identical complementary, extruded semi-cylinders joined by electromagnetic bonding along abutting longitudinal edges to form a smooth walled cylindrical pipe. In one embodiment of the invention, the smooth walled pipe forms an internal sleeve or liner within an external corrugated pipe having contiguous circumferential corrugations over its length, and having the troughs of the corrugations bonded to the outer surface of the internal sleeve. In the method for forming the pipe, two identical flat plastic sheets are extruded, then vacuumed formed into semi-cylinders each having radially outwardly projecting longitudinal flanges extending from opposite side edges thereof. A paste or dispersion containing ferro-magnetic particles is then applied to the flanges on the sides thereof adjacent the concavity of the respective semi-cylinder. The semi-cylinders are next arranged in registry to form a cylinder with the flanges abutting. Radio frequency electromagnetic radiation is then directed through the semi-cylinders at the location of the ferro-magnetic particles to fuse the semi-cylinders to each other adjacent the flanges. The flanges are then sheared away along shear lines tangential to the cylindrical side wall of the pipe thus formed.

Method for manufacturing large diameter plastic pipe

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.

Flexible conduit system

Electrical outlet box

An electrical outlet box optionally having in combination therewith, a connector fitting for connecting a corrugated conduit to the box, the box having a back wall and at least one side wall of synthetic resin. A pressure removable plug is displaced out of the plane of the side wall so as to provide a precisely delineated zone of weakness surrounding the plug. When one preferred type of connector fitting is used in combination with the box, a wedge-shaped end portion of the fitting, having a relatively small surface area, is manually pressed against the pressure removable plug along a pressure zone immediately radially inwardly from the zone of weakness. This pops the plug out of the wall of the box, leaving a neat, smooth hole into which the connector fitting may be inserted by continued manual pressure applied thereto. The connector fitting includes an expandable cylindrical body portion, and further includes an external circumferential groove at the intersection of the cylindrical body portion with the wedge-shaped end portion. The edge of the wall which defines the opening formed on removal of the plug snaps into this groove to interlock the connector fitting in the wall of the box.

Electrical outlet box and method of manufacturing same

Large diameter plastic pipe

A connector fitting for interconnecting flexible corrugated conduit sections which includes a pair of arcuate sections joined by flexible straps and having corrugation-engaging ribs which engage the corrugation conduit sections when the arcuate sections of the fitting are closed about the conduit sections. In the closed position, the two arcuate conduit sections are interlocked by means of tongues carried on each of the arcuate sections, which tongues engage a slot carried on the other of the arcuate sections.

Connector fitting for connecting corrugated conduit sections

Apparatus for cutting a conduit or tubular element transversely to the longitudinal axis thereof which includes a base having a housing projecting vertically therefrom. The housing includes opposed, substantially parallel side plates separated by a vertical slot at their upper ends, and by a mechanism chamber at their lower ends. A blade element is pivotally supported between the parallel side plates, and carries a plurality of ratchet teeth along the lower peripheral edge, and a cutting edge disposed at the opposite side of the blade element from the ratchet teeth. Between the teeth and cutting edge, the knife element has an elongated, arcuate slot formed therethrough. An operating handle is pivotally connected to the housing at a side thereof spaced from the pivotal axis of the blade element. A pawl lever is pivotally connected to the operating handle and has a dog thereon positioned to ride over and operatively engage the ratchet teeth as the operating handle is pivoted. An elongated indexing link is pivotally connected at one end to the pawl lever and carries a stud at its other end which rides in the arcuate slot in the blade element. A conduit supporting jaw is mounted at the upper side of the housing, and defines an arcuate recess dimensioned to support a conduit to be cut by the apparatus.

Floor or bench mounted conduit cutting device

A wall drainage system for protecting foundations and basement walls from water contact and seepage and including a water-impermeable synthetic resin backing plate adapted for securement to a surface to be protected and defining drainage channels along one side thereof facilitating drainage of water downwardly along the backing plate through the channels. A water-permeable synthetic resin strainer film is secured to the backing plate across the drainage channels. A synthetic resin water-receiving footer structure is connected to the lower end of the backing plate and includes a foraminous, synthetic resin bead pack and a perforated drainage pipe at least partially surrounded by the bead pack.

Wall drainage system

An electrical outlet box which includes side walls and a back wall and has an opening opposite the back wall. Screw-receiving retainer lugs are provided on the side walls to facilitate attachment of a cover plate to the box, and a plurality of conductor windows are provided in the box at the intersection of the back wall with one or more side walls. A flexible, resilient arcuate locking tongue carries locking teeth on a convex, outwardly facing side of the tongue for locking, tangential contact with an electrical conductor extended through the respective conductor window and against the locking tongue while the locking tongue is in a deflected status. Cusps having arcuate ramp surfaces are formed on the back wall to guide conductors inserted into the box through the windows into the interior of the box.

A clamp for suspending a pipe from a strut, the clamp including an elongated flexible strap carrying pipe spacing protuberances on one side, and having tee subassemblies at opposite ends. Each of the tee subassemblies includes a cross-arm which defines a tool-receiving slot aligned with a neck portion of the respective tee subassembly. Each cross-arm carries channel engaging lugs at the opposite ends thereof. The clamp is used in combination with a strut channel having an open mouth and reverse turned edges at opposite sides of the open mouth.

Growing community of inventors

Solon, OH, United States of America

Harold T Pate