Shaft seals

Claim 2

A shaft seal of the type which provides a triple labyrinth type peripheral sealing in cooperation with a suitable housing through which the shaft projects, said seal comprising an annular body made of resilient material to surround and engage the shaft and a split ring of more rigid material adapted to surround the body and having its ends shaped to engage each other in a locked condition, the body having two annular peripheral resilient flanges projecting radially outwards and spaced apart from the split ring which also projects radially outwards and is located between the resilient flanges when assembled thereby forming two annular peripheral grooves separated by the split ring, said split ring having approximately the same diameter as said annular flanges.

Claim 3

A shaft seal of the type which provides a triple labyrinth type peripheRal sealing in cooperation with a suitable housing through which the shaft projects, said seal comprising an annular body made of resilient material to surround and engage the shaft and a split ring of more rigid material adapted to surround the body and having its ends shaped to engage each other in a locked condition, the body having two annular peripheral resilient flanges projecting radially outwards and spaced apart from the split ring which also projects radially outwards and is located between the resilient flanges when assembled thereby forming two annular peripheral grooves separated by the split ring, said split ring having approximately the same diameter as said annular flanges, the split ring having hook-like ends provided with flat engaging surfaces and rounded outer surfaces which ride over each other to give a snap engagement.

Claim 4

A shaft seal of the type which provides a triple labyrinth type peripheRal sealing in cooperation with a suitable housing through which the shaft projects, said seal comprising an annular body made of resilient material to surround and engage the shaft and a split ring of more rigid material adapted to surround the body and having its ends shaped to engage each other in a locked condition, the body having two annular peripheral resilient flanges projecting radially outwards and spaced apart from the split ring which also projects radially outwards and is located between the resilient flanges when assembled thereby forming two annular peripheral grooves separated by the split ring, said split ring having approximately the same diameter as said annular flanges, the split ring having hook-like ends provided with flat engaging surfaces and rounded outer surfaces which ride over each other to give a snap engagement.

Claim 5

A shaft seal of the type which provides a triple labyrinth type peripheral sealing in cooperation with a suitable housing through which the shaft projects, said seal comprising an annular body made of resilient material to surround and engage the shaft and a split ring of more rigid material adapted to surround the body and having its ends shaped to engage each other in a locked condition, the body having two annular peripheral resilient flanges projecting radially outwards and spaced apart from the split ring which also projects radially outwards and is located between the resilient flanges when assembled thereby forming two annular peripheral grooves separated by the split ring, said split ring having approximately the same diameter as said annular flances, said body and split ring having cooperating shaped parts to locate them circumferentially relatively to each other.

Claim 6

A shaft seal of the type which provides a triple labyrinth type peripheral sealing in cooperation with a suitable housing through which the shaft projects, said seal comprising an annular body made of resilient material to surround and engage the shaft and a split ring of more rigid material adapted to surround the body and having its ends shaped to engage each other in a locked condition, the body having two annular peripheral resilient flanges projecting radially outwards and spaced apart from the split ring which also projects radially outwards and is located between the resilient flanges when assembled thereby forming two annular peripheral grooves separated by the split ring, said split ring having approximately the same diameter as said annular flances, said body and split ring having cooperating shaped parts to locate them circumferentially relatively to each other.

Claim 7

A shaft seal of the type which provides a triple labyrinth type of peripheral sealing in cooperation with a suitable housing, said seal comprising an annular body made of resilient material to surround and engage the shaft said body being approximately H-shaped in cross-section to form two annular peripheral flanges projecting radially outwards and two shaft engaging flanges projecting radially inwards, a split ring of more rigid material than the body, a central peripheral groove in said body engaged by said split ring, said split ring extending out of the groove radially and being spaced from the flanges to provide two separated peripheral sealing grooves, said split ring having ends shaped to engage each other with snap action in locked condition and means to locate the body and split ring circumferentially relatively to each other.

Claim 8

A shaft seal of the type which provides a triple labyrinth type of peripheral sealing in cooperation with a suitable housing, said seal comprising an annular body made of resilient material to surround and engage the shaft said body being approximately H-shaped in cross-section to form two annular peripheral flanges projecting radially outwards and two shaft engaging flanges projecting radially inwards, a split ring of more rigid material than the body, a central peripheral groove in said body engaged by said split ring, said split ring extending out of the groove radially and being spaced from the flanges to provide two separated peripheral sealing grooves, said split ring having ends shaped to engage each other with snap action in locked condition and means to locate the body and split ring circumferentially relatively to each other.