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US 4,140,240 AGranted
Closure for pipes or pressure vessels
AssigneeGeneral Descaling Company Limited
InventorDouglas J. Platts
Life of this patent
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AssigneeGeneral Descaling Company Limited
InventorDouglas J. Platts
Estimating the term…
A closure for a pipe or pressure vessel comprises a door adapted to fit into an aperture in a pipe or pressure vessel and an arcuate locking member disposed around the periphery of the door for locking the door to the pipe or pressure vessel, the ends of the locking member being movable towards and away from each other to cause radial expansion and contraction of the locking member, whereby the locking member is brought into and out of locking engagement with the pipe or pressure vessel. A seal for the closure comprises a rigid, usually annular, support having first and second flanges for engaging respective opposed faces on the closure and the pipe or pressure vessel, the first flange having a greater surface area and being less flexible than the second flange, and a flexible lining carried by the support and extending beyond the terminal edges of the flanges.
A closure for a pipe or pressure vessel comprising a door adapted to fit into an aperture in a pipe or pressure vessel, an arcuate locking member disposed around the periphery of the door for locking the door to the pipe or pressure vessel, means for moving the ends of the locking member away from and towards each other to cause radial expansion and contraction of the locking member, whereby the locking member may be brought into and out of locking engagement with the pipe or pressure vessel, and a hinge assembly by means of which the door may be mounted on the pipe or pressure vessel, said hinge assembly comprising a main bracket adapted to be secured to the pipe or pressure vessel, a secondary bracket pivotally mounted on the main bracket and a support for the door mounted on the secondary bracket for movement about an axis parallel to the pivot axis of the secondary bracket.
Dependencies are inferred from the claim text.