Abstract: 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.
Abstract: A wellpoint having an outer screen pipe, and an inner intake pipe connected to a vacuum source. A positionable valve is mounted between the screen pipe and the intake pipe to regulate the amount of screen pipe surface subject to vacuum by the intake pipe.
November 5, 1974
Date of Patent:
January 6, 1976
Griffin Wellpoint Corporation
Walter W. Brennan, Charles R. Myers, Paul E. Perry