Cherne Industries Incorporated

Allen D Mathison

Dale K Nelson

Bryan R Benson

Marc P Bevacco

Randy D Smith

Richard E Larson

Lloyd G Cherne

An assembly process for inflatable fabric bag plugs used to seal low pressure pipelines. The assembly process steps include marking and cutting coated fabric elements from a predetermined woven fabric and a plurality of sealing strips. The fabric elements and sealing strips include a plug body portion, main seam cap strips and first and second end seam cap strips. The process steps further include forming a flat tubular plug body from the plug body portion and bonding sealing rib extrusions thereto. A first end closure is formed in the plug body, a first tethering assembly is bonded over the first end closure and ports are installed therethrough for receiving an inflation assembly and a gauge assembly. A second end closure is formed in the plug body and an opposing tethering assembly is formed and attached thereover. The main seam cap strips, the first and second end seam cap strips and sealing strips are bonded over all internally and externally exposed fabric edges of the plug body to prevent leakage when the plug is inflated.

Assembly process for fabric bag plug

External sealing cap for pipes

Pipeline plug

Mechanical test plug for overflow and waste drains

An inflatable fabric bag plug for sealing low pressure pipelines. The bag plug has a body portion constructed of a coated fabric material and includes a plug body portion, main seam cap strips, first and second end seam cap strips and a plurality of sealing strips which are bonded over all internally and externally exposed fabric edges to prevent leakage when the plug is inflated. The body portion has first and second end closures and opposing tethering assemblies which are bonded over the end closures and to the plug body portion. An inflation assembly and a pressure gauge assembly are provided for inflating and deflating the plug as well as monitoring the plug during use. Bypass assemblies are provided to permit the passage of fluids through the bag plug when inflated in a pipeline.

Inflatable fabric bag plug

Small drain flushing expandable plug

Miniature pneumatic test plug assembly

Pneumatic plug for pipelines

Remote positioning pneumatic plug

A pneumatic test plug for clean-out tees having an elastomeric inflatable body, a closed top, an inwardly tapered side wall and an open bottom end with a peripheral shoulder having a downwardly extending peripheral ridge. A molded end cap with a cylindrical wall having exteriorly disposed threads and an inwardly disposed circular retention channel or area receives a retention collar for placement within the molded end cap and between the cylindrical wall and the inflatable body bottom end. The retention collar fixes the peripheral shoulder and downwardly extending peripheral ridge in the circular retention channel or area of the end cap and compressingly holds the peripheral shoulder of the inflatable body into the end cap.

Pneumatic plug for clean-out tees

Mechanical inspection and sealing plug for a monitoring well

Pneumatic test plug

Pipe plug latch unit

Pipe plug lock unit

A high pressure mechanical plug device for sealing and locking into a high interior pressure pipeline. The mechanical plug device has a hollow cylindrical body structure with an end wall and a side wall structure having a plurality of apertures. A piston structure having an end wall and a frustoconical ram of a predetermined slope is provided for movement in the cylindrical body structure. An elastomeric sealing member is in communication with the end wall of the piston structure. A plurality of rigid securement members are provided for extension through the apertures of the cylindrical body structure and for slidingly engaging the frustoconical ram. A draw bolt extending axially from the frustoconical ram through the end wall of the cylindrical body is provided with a nut to move the piston structure into the cylindrical body to seal and lock the plug device in the pipeline.

High pressure mechanical plug device

Growing community of inventors

Richfield, MN, United States of America

Allen D Mathison