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US 5,044,823 AGranted
Relating to seals
AssigneeC.E. Heinke & Company Limited
InventorGeorge H. Burgess
Life of this patent
Estimating the term…
Abstract
A gap between tunnel segments 1 is sealed by rubber sealing members 8 that are provided with grooves 10 and tubular cavities 11. To improve sealing when a high pressure is applied to one side of the seal, at least one cavity nearest that side is open to the high pressure through apertures 12.
Claims11
A sealing member for sealing a gap between two members to separate fluid media at different pressures, comprising:
- an elongate member of elastic material having at least one cavity within it extending along its length,
- wherein at least one said cavity is in communication with the exterior at intervals along its length through a portion of the surface of the sealing member that is arranged, in use, to be exposed to the medium at the higher pressure, and is in communication with the exterior through only the said portion of the surface of the sealing member.
A sealing member for use between two abutting static structural members which separate media under different respective pressures, said sealing member comprising:
- a single unitary flexible body having plural closed cavities, at least one but not all of said cavities including an opening therein which communicates directly or indirectly with the exterior of said body at a location to be exposed in use to the higher pressure one of said media.
Dependencies are inferred from the claim text.