发明名称 Automatic driller
摘要 An automatic driller for controlling a rotating primary mover. The automatic driller has a manual brake handle. The manual brake handle has a stroke. A first elastic means applies a first tension to the manual brake handle. A swivel bracket is connected to the first elastic means. The first elastic means provides a first tension onto the swivel bracket.
申请公布号 US7537066(B1) 申请公布日期 2009.05.26
申请号 US20070748271 申请日期 2007.05.14
申请人 EAGLE ROCK MANUFACTURING, LLC 发明人 FLUD SAMMY KENT;WEDDLE ANDREW
分类号 E21B44/02 主分类号 E21B44/02
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