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A mechanical seal assembly is described in which a drive pin can stably exhibit a function to prevent rotation of the stationary seal ring, and a plastic material capable of not causing contamination can be used as a structural material for the drive pin. The seal (4) has a rotary seal ring (8)
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## Patents Seal for an appliance Applicant: Bristol-Myers Squibb Co, USA Inflatable seals for rectal appliances are described in these two patents.
Cross-section of the mechanical seal with pressurized feed to the seal face described in WO 2006/051702, and a detail of the annular face grooves.
## March 2009 Sealing Technology 13 that has seal grooves on the outside and inside diameters. O-rings are fitted in the grooves and there may be two or three grooves each side, with additional groove providing for additional seals that, it is claimed, will provide improved sealing. The number of