发明名称 LOCKING GROUND HOLE COVER
摘要 A locking ground hole cover is disclosed comprising a cover plate with a scissor-type apparatus suspended therefrom which apparatus can be actuated from above the cover plate. The apparatus allows for the locking of a hole by pulling the cover plate down into a sealed locked position with the hole mouth. Variations on the device are disclosed.
申请公布号 CA2292295(A1) 申请公布日期 2001.06.15
申请号 CA19992292295 申请日期 1999.12.15
申请人 MIHALICZ, LARRY;BOYACHEK, OREST 发明人 MIHALICZ, LARRY;BOYACHEK, OREST
分类号 E01C23/06;E01F9/60;E02D17/10 主分类号 E01C23/06
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