Pipes and tubular conduits – With closures and plugs – Inflatable
Patent
1985-11-14
1986-09-30
Marcus, Stephen
Pipes and tubular conduits
With closures and plugs
Inflatable
138 89, 138 90, 277 346, 285259, F16L 5510
Patent
active
046142061
ABSTRACT:
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.
REFERENCES:
patent: 1221733 (1917-04-01), Henderson
patent: 2681706 (1954-06-01), Pottorf
patent: 2974685 (1961-03-01), Ver Nooy
patent: 3129726 (1964-04-01), Moore
patent: 3292254 (1966-12-01), Sloan
patent: 3902528 (1975-09-01), Tartabini
patent: 4449584 (1984-05-01), Christensen
Cherne Industries, Inc., Multi-Size Muni-Ball, 5/76, Product Brochure.
American Logiball, Inc., Reinforced Rubber Multisize Plugs, 2/84, Product Brochure.
Mathison Allen D.
Nelson Dale K.
Cherne Industries, Inc.
Eggink Anthony G.
Marcus Stephen
Peters Leo J.
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