Lid assembly for facility access opening
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United States of America Patent
Stats
-
Oct 11, 2005
Grant Date -
Jun 2, 2005
app pub date -
Feb 13, 2003
filing date -
Feb 14, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A cover assembly includes a support frame (20) fixed to a utility access hole and a rounded cover (10) fitted into the support frame. The support frame is provided in its upper portion with an S-curved inner peripheral surface (20b) having a convex curved surface portion (21) and a concave curved surface portion (22) that continues to the convex curved surface portion and is formed thereabove. The cover has an S-curved peripheral surface (10b) that is substantially complementary in shape to the S-curved inner peripheral surface of the support frame. When the access hole is closed by the cover, the cover is smoothly fitted into the support frame due to a guide function of the S-curved inner peripheral surface of the support frame.
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