Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1986-03-24
1987-05-19
Husar, Cornelius J.
Hydraulic and earth engineering
Earth treatment or control
Chemical
406166, 285283, 414139, 405248, 405267, 405258, E02D 724
Patent
active
046663460
ABSTRACT:
Rotatable fill pipe for use in blind-filling underground voids has a collapsible backfill elbow on the lower end thereof, including an upper elbow part rigidly connected to the lower end of the fill pipe and a lower elbow part pivotally connected to the upper elbow part for pivotal movement between a lower position in coaxial alignment with the fill pipe to facilitate passage of the backfill elbow and lower end of the fill pipe through a fill hole into an underground void, and a raised position extending at an angle relative to the fill pipe to facilitate distribution of fill material introduced into the underground void through the fill pipe in a circular pile within the underground void as the fill pipe and backfill elbow are rotated about the longitudinal axis of the fill pipe. A cable may be connected to the lower elbow part for remotely actuating the lower elbow part for pivotal movement between the lower and raised positions. Also, a lower pipe extension may be provided on the lower elbow part for distributing the fill material in a larger circular pile within the underground void.
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Hall Kristina I.
Hanna-Beric Systems, Inc.
Husar Cornelius J.
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