An apparatus to produce cementitial ducts in a trench or trench (Machine-translation by Google Translate, not legally binding)

摘要

Apparatus for producing cement ducts in a trench or trench, comprising a straight movable barrier having a configuration that substantially conforms to the cross-sectional configuration of the trench in which the duct is to be formed and adapted to be moved along of the trench with its plane disposed normal to the longitudinal axis of the trench, an interior shape comprising a lower movable member secured to the barrier inward of the bottom and sides thereof and extended backwards of the barrier and defining a space with the bottom of said ditch, said form including a top member composed of a plurality of removably secured sections together, disposed in sliding overlapping relationship with respect to the movable lower member and extended through the detent engagement catch slide therewith, a member of outer form secured to the barrier and defining a space with respect to said upper member, tenie said outer-shaped member having an opening therein communicating with the space between the inner form and the outer-form member and between the inner form and the outer-form member and between the inner form and the bottom of the trench for the introduction of settable material, and means for moving said barrier longitudinally of the trench and with respect to said upper member. (Machine-translation by Google Translate, not legally binding)