| 摘要 |
<p>A seal for sealing a space between a housing and a rotatable shaft disposed within the housing includes an annular elastomeric seal body disposeable about the shaft. The body has a central axis an outer portion disposeable within a housing recess and an inner portion with a lip engageable with the shaft. At least a portion of the seal body is configured to bendingly deflect when fluid pressure exerted on the body exceeds a predetermined value such that at least a section of the body inner portion displaces radially outwardly to permit fluid flow between the shaft and the seal body. A rigid support member is disposed within the body outer portion so as to be located at least partially within the housing recess and is configured to reduce bending deflection of the body inner portion so as to prevent disengagement of the body from the recess.</p> |
