发明名称 Device for facilitating insertion of a beach umbrella in sand
摘要 A device for facilitating the insertion of a beach umbrella in the sand includes a shaft formed as a helix about an axis of rotation with a handle attached to one end thereof. The curvature of the helix defines a major diameter and the shaft of the device is at least a quarter the size of the major diameter. The shaft is manually inserted in the sand and then withdrawn thereby forming a hole for the insertion of the beach umbrella support shaft.
申请公布号 US5454435(A) 申请公布日期 1995.10.03
申请号 US19940249148 申请日期 1994.05.25
申请人 REINHARDT, LISA 发明人 REINHARDT, LISA
分类号 E21B11/00;(IPC1-7):E21B10/44 主分类号 E21B11/00
代理机构 代理人
主权项
地址