초록 ▼

A multi-size expansible pneumatic plug device for sealing the interior of a pipeline section. The expansible plug device has interchangeable front and rear circular rigid support members for supporting the remaining elements of the device and each rigid support member has a generally flat end portio

A multi-size expansible pneumatic plug device for sealing the interior of a pipeline section. The expansible plug device has interchangeable front and rear circular rigid support members for supporting the remaining elements of the device and each rigid support member has a generally flat end portion and a body portion having parallelly disposed circumferential ridges to form first and second grooved portions. The circumferential ridges have top surfaces of an equal predetermined inclined slope. At least one of the rigid support members additionally has an air inlet means. An exteriorly smooth and interiorly corded elastomeric sleeve member is provided for expansion to seal against the interior wall of a pipeline section. The sleeve member has interiorly disposed parallel circumferential rings of a predetermined spacing inward its ends. A pair of strapping clamp members hold the sleeve member rings matingly between the parallel ridges and in the grooved portions of each rigid support member during assembly. A pair of tapered end ring members having an interior frustoconical configuration of the same predetermined slope as the rigid support member ridge surfaces are provided for frictionally engaging and fixing the sleeve member to the front and rear rigid support members.

대표청구항 ▼

An expansible pneumatic plug device for sealing the interior of a pipeline section, said device having expansible body portions to permit the sealing of a predetermined range of pipeline diameters, said pneumatic plug device comprising: a. interchangeable front and rear circular rigid support member

An expansible pneumatic plug device for sealing the interior of a pipeline section, said device having expansible body portions to permit the sealing of a predetermined range of pipeline diameters, said pneumatic plug device comprising: a. interchangeable front and rear circular rigid support members for supporting the remaining elements of the device; each said rigid support member having a generally flat end portion and a body portion having parallelly disposed circumferential ridge members to form first and second grooved portions, said circumferential ridge members having top surfaces that lie in a plane of a predetermined inclined slope, at least one said rigid support member additionally having air inlet means; b. an exteriorly smooth and interiorly corded elastomeric sleeve member for expansion to seal against the interior wall of a pipeline, said sleeve member having interiorly disposed parallel circumferential rings of a predetermined spacing inward its ends to engage said first and second grooved portions of said rigid support members, said sleeve member further having a plurality of apertures circumferentially disposed about its ends at predetermined locations, c. a pair of strapping clamp members, each said clamp member for holding said sleeve member with its rings matingly between the parallel ridge members and in said second grooved portion of each said rigid support member during assembly of said device, d. a pair of tapered end ring members having an interior frustoconical configuration of the same predetermined slope as said rigid support ridge members for frictionally engaging the sleeve member to said front and rear rigid support members, said end ring members further having a plurality of apertures disposed circumferentially at predetermined locations, and e. a plurality of set screw means for threading through said tapered end ring member apertures, for extending through said sleeve member apertures and for abutting in said first grooved portion of said rigid support member bodies to fix said end ring members to said rigid support members and to further fix said sleeve member ends therebetween.