发明名称 UNIVERSAL TAP JACK
摘要 A drilling device comprises a tubular body portion having annular collar slidably mounted thereon so that the body can freely rotate within the collar and a drill rod is secured to one end of the body. A universal connection at the other end of the body is provided for attachment thereof to drill rotating means and a handle member is pivotally secured to the anular collar for manually directing the device.
申请公布号 US3700347(A) 申请公布日期 1972.10.24
申请号 USD3700347 申请日期 1970.12.07
申请人 ALGAMA STEEL CORP. LTD.:THE 发明人 SILVIO EDWARD NANNE;RENVILLE O. MOODY
分类号 B23Q5/04;B23Q5/54;C21B7/12 主分类号 B23Q5/04
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