发明名称 Access cover fastening device
摘要 A hollow aluminum pole has access to its interior through a hand hole frame having an access aperture which can be blocked by a cover having a lower end pivotally attached to the hand hole frame by a pivot pin. The pivot pin is biased inwardly by a coil spring which permits outward movement of the cover to a position in which it can be rotated downwardly out of alignment with the access opening.
申请公布号 US7007986(B2) 申请公布日期 2006.03.07
申请号 US20030448437 申请日期 2003.05.30
申请人 KEARNEY-NATIONAL INC. 发明人 LODWICK, JR. WILLIAM HADLEY
分类号 E05C5/04;E04H12/00 主分类号 E05C5/04
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