Shaft seals
AssigneeNeptune Glenfield Limited
InventorJohn W. Lambie
Life of this patent
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Abstract
A shaft seal incorporates a casing formed with a stepped bore both diameters of which are greater than the diameter of the shaft fitted to the bore. A bearing sleeve fitting the shaft is located in the smaller diameter portion of the bore. A seal-carrying ring held captive within the larger diameter portion of the bore is formed to support at each end a sealing ring in contact with the shaft and a sealing ring located between the outer surface of the ring and the casing.
Claims6
A shaft seal which incorporates a casing formed with a stepped bore having a small diameter portion extending from one end of the casing, the diameter of said portion being greater than the diameter of the shaft to be sealed, and a large diameter portion extending from the other end of the casing, a bearing sleeve arranged to fit the shaft held against rotation within the smaller diameter portion of the bore, a seal-carrying ring contained within the larger diameter portion of the bore, each end face of the ring being formed with an annular notch which penetrates some distance along the inner surface of the ring, a resilient sealing ring contained in each notch and a resilient sealing ring located between the outer surface of the ring and the casing.
Dependencies are inferred from the claim text.