초록 ▼

A pipe sealing apparatus insertable inside a pipe and inflatable therein to prevent fluid flow through the pipe includes an elongated inflatable sleeve of elastomeric material and an elongated outer sleeve substantially surrounding the inflatable sleeve. The inflatable sleeve is shiftable with respe

A pipe sealing apparatus insertable inside a pipe and inflatable therein to prevent fluid flow through the pipe includes an elongated inflatable sleeve of elastomeric material and an elongated outer sleeve substantially surrounding the inflatable sleeve. The inflatable sleeve is shiftable with respect to the outer sleeve during inflation of the inflatable sleeves. An intermediate sleeve, shiftable with respect to each of the inflatable sleeve and outer sleeve, may be provided between the inflatable sleeve and the outer sleeve. The ends of the inflatable, intermediate, and outer sleeves may be folded and clampingly sealed to each other to provide a fluid-tight seal at opposite ends of the sealing apparatus. A flexible cylindrical member may extend through the inflatable sleeve between the opposite ends thereof, an inflatable space being defined between the cylindrical member and the inflatable sleeve.

대표청구항 ▼

[ What is claimed is:] [1.] A pipe sealing apparatus insertable into a pipe and inflatable therein to restrict fluid flow through the pipe, said pipe sealing apparatus comprising:a first support member disposed at a first end of said pipe sealing apparatus;a second support member disposed at a secon

[ What is claimed is:] [1.] A pipe sealing apparatus insertable into a pipe and inflatable therein to restrict fluid flow through the pipe, said pipe sealing apparatus comprising:a first support member disposed at a first end of said pipe sealing apparatus;a second support member disposed at a second end of said pipe sealing apparatus;an elongated inflatable sleeve includinga first inflatable sleeve end sealingly engaging said first support member;a second inflatable sleeve end sealingly engaging said second support member;an inner surface extending between said first and second inflatable sleeve ends, said inner surface substantially defining an expandable inflatable space therein; andan outer surface extending between said first and second inflatable sleeve ends;an elongated outer sleeve havinga first outer sleeve end;a second outer sleeve end; andan inner surface substantially surrounding said inflatable sleeve, wherein said outer surface of said inflatable sleeve is shiftable with respect to said inner surface of said outer sleeve during inflation of said inflatable space;a first means for securing said first outer sleeve end about said first end of said pipe sealing apparatus, wherein a fluid tight seal is formed between said first support member and said first outer sleeve end;a second means for securing said second outer sleeve end about said second end of said pipe sealing apparatus, wherein a fluid tight seal is formed between said second support member and said second outer sleeve end; andat least one elongated middle sleeve substantially surrounding said inflatable sleeve and disposed between said inflatable sleeve and said outer sleeve.