Rotary shaft seal
AssigneeSaint-Gobain Performance Plastics Corporation
InventorsMario BOSKOVSKI, Sarah Shabbir, Mirco Gronitzki
Life of this patent
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Abstract
A rotary shaft seal including an annular body having an aperture defining a central axis and an inner surface; a shaft disposed within the aperture of the annular body; and a sealing element positioned at least partially between the shaft and the annular body, where the sealing element is configured to form a seal between the annular body and the shaft, where the sealing element includes a body having a U-shaped or a V-shaped cross-section including a plurality of lips, where at least one lip of the sealing element is fixed to at least one of the shaft or the annular body, and where a cavity exists between at least one of the plurality of lips and at least one of the shaft or the annular body.
Claims20
A rotary shaft seal comprising:
- an annular body having an aperture defining a central axis and an inner surface;
- a shaft disposed within the aperture of the annular body;
- and
- a sealing element positioned at least partially between the shaft and the annular body, wherein the sealing element is configured to form a seal between the annular body and the shaft, wherein the sealing element has a U-shaped or a V-shaped cross-section comprising at least one lip element, wherein the at least one lip element of the sealing element is fixed to at least one of the shaft or the annular body, and wherein a cavity exists between the at least one lip element and at least one of the shaft or the annular body.
A rotary shaft seal comprising:
- an annular body having an aperture defining a central axis and an inner surface;
- a shaft disposed within the aperture of the annular body;
- and
- a sealing element positioned at least partially between the shaft and the annular body, wherein the sealing element is configured to form a seal between the annular body and the shaft, wherein the sealing element has a U-shaped or a V-shaped cross-section comprising a plurality of lips, wherein a cavity exists between at least one of the plurality of lip elements and at least one of the shaft or the annular body, and wherein a first lip element of the plurality of lips has an inner surface area, B1, on an interior side of the first lip, wherein a second lip of the plurality of lips has an inner surface area, B2, on an interior side of the second lip, and wherein B2/B1 is less than 0.95.
A method comprising:
- providing an annular body having an aperture defining a central axis and an inner surface;
- providing a shaft;
- positioning a sealing element at least partially between the shaft and the annular body, wherein the sealing element is configured to form a seal between the annular body and the shaft, wherein the sealing element has a U-shaped or a V-shaped cross-section comprising at least one lip element;
- and
- fixing the at least one lip element of the sealing element to at least one of the shaft or the annular body, wherein a cavity exists between the at least one lip element and at least one of the shaft or the annular body.
Dependencies are inferred from the claim text.