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US 2001/0017445 A1Published application
Seal assemblies
AssigneeJohn Crane UK Limited
InventorsLeonard Arthur Hall, Wayne Darren Read
Life of this patent
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AssigneeJohn Crane UK Limited
InventorsLeonard Arthur Hall, Wayne Darren Read
Estimating the term…
A seal assembly (22) for sealing a pressurized gaseous product includes, a pair of seals (24,26) spaced axially to provide a chamber (28) therebetween, a gas seal (24) being disposed on the inboard side of the seal assembly (22) between the sealed gaseous product and the chamber (28), an inlet (38) opening to the side of the gas seal (24) exposed to the gaseous product, the inlet (38) being connected to a supply of clean gas, the chamber (38) defined between the seals (24,26) being connected to a reservoir (50), the reservoir (50) being connected back to inlet (38) via a pressure intensifier (70) and the reservoir (50) being connected to the supply of clean gas, so that additional clean gas may be supplied thereto, when pressure in the reservoir (50) falls below a predetermined minimum value.
A seal assembly for sealing a pressurised gaseous product comprising a pair of seals spaced axially to provide a chamber therebetween, an inboard seal being a gas seal which is disposed between the sealed gaseous product and the chamber, means being provided to supply clean gas to an inlet opening to the side of the inboard seal exposed to the gaseous product, the chamber defined between the seals being connected to a reservoir, the reservoir being connected back to the inlet via a pressure intensifier and means being provided to deliver additional clean gas to the reservoir when pressure in the reservoir falls below a predetermined minimum value.
Dependencies are inferred from the claim text.