초록 ▼

A fluid seal made of elastomeric material for use between an external stationary member and a rotating internal member avoids use of a customary pressed steel case. The seal may be stretched over an external flange on a rotatable shaft and recover from the elongation to the designed dimension at whi

A fluid seal made of elastomeric material for use between an external stationary member and a rotating internal member avoids use of a customary pressed steel case. The seal may be stretched over an external flange on a rotatable shaft and recover from the elongation to the designed dimension at which the seal is to operate within the external stationary member. A specially formulated elastomeric composition accommodates elongation during stretching in excess of 300%.

대표청구항 ▼

In combination, a stretchable shaft seal stretched over a crankshaft and sealing fluid between said crankshaft and a split housing, said crankshaft having a predetermined diameter and comprising a flange having a diameter substantially greater than said predetermined diameter, said housing comprisin

In combination, a stretchable shaft seal stretched over a crankshaft and sealing fluid between said crankshaft and a split housing, said crankshaft having a predetermined diameter and comprising a flange having a diameter substantially greater than said predetermined diameter, said housing comprising a first housing member and a second housing member, said first and second housing members defining a split bore therebetween and clamping said soil therein; said seal comprising an elastomeric seal body having a continuous annular form and providing with an integrally molded seal lip, said seal body and said seal lip each comprising an elastomeric material which accommodates elongation over said flanged crankshaft of at least 100% of its original non-stretched length and recovers to its originally molded dimension and forms a continuous positive elastic seal around said flanged crankshaft after undergoing said elongation and wherein leak paths through said seal body are eliminated by said continuous annular form; said seal body having an external circumferential outer surface portion compressed within said split bore and forming a continuous non-rotating annular static seal against said split bore; and said seal lip projecting from said seal body and forming said positive elastic seal as a continuous dynamic elastic seal around seal predetermined diameter of said crankshaft after being stretched over said flange.