Inflatable Seal

An inflatable seal comprising an annular body made of elastic material, wherein the inflatable seal comprises a chamber disposed in the annular body, wherein the inflatable seal includes a fixing end and a movable end opposite to the fixing end in a cross section, wherein the inflatable seal further includes first and second sides interconnected between the fixing end and the movable end and opposite to each other, and wherein the movable end has a reinforcing layer therein.

An inflatable seal comprising an annular body that is circular, wherein the inflatable seal is comprised of at least two arcuate bladders which are arcuate, identical to each other, and coupled to each other, wherein each of the at least two bladders includes a chamber separating the bladder, such that the bladder has an outer arcuate portion, an inner arcuate portion spaced from the outer arcuate portion in a radial direction, two sides spaced from each other in an axial direction perpendicular to the radial direction, and first and second ends spaced from each other in an arcuate extending direction of the bladder, wherein the outer arcuate portion has an air hole intercommunicating with the chamber, wherein each of the at least two bladders includes a lining enveloped in the outer arcuate portion thereof, and wherein each air hole extends through a respective lining.