发明名称 Post hole digger
摘要 The subject invention provides a post hole digger which facilitates the digging of deep uniform diameters post holes. The post hole digger accomplishes this by crossing the handles to close the shovel blades. This allows the handles to stay within the diameter of the hole opening, removing the need to increase the diameter of the hole opening as the depth of the hole is increased.
申请公布号 US6273482(B1) 申请公布日期 2001.08.14
申请号 US20000614872 申请日期 2000.07.12
申请人 PICKREN PORTER T. 发明人 PICKREN PORTER T.
分类号 E21B11/00;E21B27/00;(IPC1-7):A01B1/00 主分类号 E21B11/00
代理机构 代理人
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