Patent ID: 8083234

Claim:
An apparatus comprising: a housing with an aperture; a member that extends through said aperture; a seal assembly for sealing a clearance gap between an aperture boundary and the member, the seal assembly comprising a seal member and a seal member mounting means disposed around the seal member and configured to engage with the aperture boundary; and at least two joined parts, the aperture being provided in one of said parts, wherein: the seal member mounting means is configured to seal an alignment interspace provided in the clearance gap between the seal member and the aperture boundary, the seal member mounting means is configurable to permit the seal member to be located at a position relative to the aperture boundary in dependence upon the relative positions of the member and aperture boundary to thereby accommodate misalignment between the member and aperture boundary, the seal member mounting means is configurable to rigidly lock the seal member relative to the aperture boundary in said position; the clearance gap comprises an alignment interspace to permit the seal member to be located at a position in the plane of the aperture in dependence upon the relative positions of the member and aperture boundary; each of the at least two joined parts is provided with location features which each have a manufacturing tolerance; and the alignment interspace is at least 60% of the sum of the manufacturing tolerances of the location features but not greater than 120% of the sum of the manufacturing tolerances.