Rotary reciprocating seals with exterior metal band
First Claim
1. A seal assembly comprising:
- a seal ring in the shape of an annulus having a body portion with an inside flange and an outside flange extending longitudinally therefrom, said body portion having a smooth cylindrical exterior surface, said seal ring being formed from a compression moldable material;
spring means, disposed between the flanges, for outwardly biasing the flanges from one another to cause sealing between a shaft and a housing;
band means, disposed externally around the body portion exterior surface, for holding the seal ring within the housing, reducing distortion of the seal ring within the housing, and preventing rotation of the seal ring within the housing, said band means comprising interior groove means, with adjoining depending portions for engaging the body portion exterior surface in order to compressively mold the body portion exterior surface into the groove means, and exterior groove means for increasing flexibility of the band means in order to accommodate for out-of-roundness between the seal ring and the shaft, said interior and exterior groove means being aligned with one another to define a narrowed portion of said band means, said band means having a maximum outside diameter less than an outside diameter of the outside flange.
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Accused Products
Abstract
A seal assembly is provided for rotary and reciprocating sealing between a shaft and a housing. The seal assembly includes a seal ring in the shape of an annulus having a body portion with an inside flange and an outside flange extending longitudinally therefrom. A body portion of the seal ring has a smooth cylindrical exterior surface and the seal ring is formed from a compressible moldable material. A spring is provided and disposed between the flanges for outwardly biasing the flanges from one another to enable sealing between the shaft and the housing. A band is provided and disposed externally around the body portion for holding the seal ring within the housing. A bond is provided between the band and the seal ring by way of striations and grooves which enable the seal ring material to compressibly mold into the band to provide a bond therebetween.
83 Citations
20 Claims
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1. A seal assembly comprising:
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a seal ring in the shape of an annulus having a body portion with an inside flange and an outside flange extending longitudinally therefrom, said body portion having a smooth cylindrical exterior surface, said seal ring being formed from a compression moldable material; spring means, disposed between the flanges, for outwardly biasing the flanges from one another to cause sealing between a shaft and a housing; band means, disposed externally around the body portion exterior surface, for holding the seal ring within the housing, reducing distortion of the seal ring within the housing, and preventing rotation of the seal ring within the housing, said band means comprising interior groove means, with adjoining depending portions for engaging the body portion exterior surface in order to compressively mold the body portion exterior surface into the groove means, and exterior groove means for increasing flexibility of the band means in order to accommodate for out-of-roundness between the seal ring and the shaft, said interior and exterior groove means being aligned with one another to define a narrowed portion of said band means, said band means having a maximum outside diameter less than an outside diameter of the outside flange. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A seal assembly comprising:
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a shaft; a housing; a seal ring in the shape of an annulus having a body portion with an inside flange and an outside flange extending longitudinally therefrom, said body portion having a smooth cylindrical exterior surface, said seal ring being formed from a compression moldable material; spring means, disposed between the flanges, for outwardly biasing the flanges from one another to cause sealing between the shaft and the housing; band means, disposed externally around the body portion exterior surface, for holding the seal ring within the housing, reducing distortion of the seal ring within the housing, and preventing rotation of the seal ring within the housing, said band means comprising interior groove means, with adjoining depending portions, for engaging the body portion exterior surface in order to compressively mold the body portion exterior surface into the groove means, and exterior groove means for increasing flexibility of the band means in order to accommodate for out-of-roundness between the seal ring and the shaft, said interior and exterior groove means being aligned with one another to define a narrowed portion of said band means, said band means having a maximum outside diameter less than an outside diameter of the outside flange. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification