| 摘要 |
<p>A wellpoint jetting head having a plurality of spade-like teeth annularly positioned around the forward end of the head and projecting longitudinally therefrom for dislodging and chopping of the soil during hydrostatic jetting in combination with a tilting, side-to-side, rotational and/or up-and-down manipulation of the wellpoint. The teeth are beveled in a counterbalancing inward-outward staggered arrangement with the cutting surface formed by the teeth ends defining a cutting plane canted with respect to the longitudinal axis of the head. The teeth are circumferentially spaced providing lateral confronting side faces for dislodging soil particulate during use.</p> |
