B - Operations – Transporting – 21 – K
Patent
B - Operations, Transporting
21
K
26/162
B21K 1/20 (2006.01) F16B 3/00 (2006.01) F16J 13/08 (2006.01) F16K 27/08 (2006.01)
Patent
CA 1174445
ABSTRACT OF THE DISCLOSURE A cover having a substantially elliptical periphery is fitted into a substantially eliptical opening in a hous- ing. Along the two longer sides of the elliptical periphery first half-throats or grooves of semi-circular cross-section are formed whereof their open sides face the open sides of second half-throats or grooves of semi-circular cross-section formed along the inner edge of the two longer sides of the elliptical opening. Each combination of a corresponding first and second half-throat forms a respective substantially complete throat along which corresponding cylindrical lock- ing bars disposed therein extend and prevent up and down dis- placement of the cover relatively to the housing. Each throat is interrupted intermediate its opposite ends by an elongate recess in the housing, allowing said bars to be in- serted into the throat through the recess. The recesses and the gap between the cover periphery and the inner edge of the housing opening are occupied and covered by an elliptical hermetic seal. The cover is fixed without bolts to the housing which can be a valve housing, particularly of an underground valve or one subject to a corrosive atmosphere.
388491
Marks & Clerk
Pont-A-Mousson S.a.
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