Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ – Repositioning or moving mold to form sequential portions of...
Patent
1975-02-07
1977-01-04
Baldwin, Robert D.
Plastic and nonmetallic article shaping or treating: processes
Forming structural installations in situ
Repositioning or moving mold to form sequential portions of...
264312, 425 59, 425 64, E03F 306
Patent
active
040013588
ABSTRACT:
A cementitious conduit is formed in situ in a ditch or the like by defining an elongated volume of annular cross-section within the ditch with the axis of elongation of the annular volume extending along the ditch and with one end of the annular volume closed and the other end thereof open. A solidifiable cementitious material is introduced into the annular volume at the closed end thereof and such cementitious material is continuously urged to move toward the open end thereof at a rate at least equal to a given rate. Simultaneously, the volume is moved along the ditch at such given rate with the closed end thereof preceding the open end thereof and circumferential frictional forces are applied to the cementitious material at the inner surface of such annular volume. According to a preferred embodiment of the apparatus for practicing this invention, the inner boundary of the annular volume is defined by two axially aligned cylindrical members in abutting end-to-end relation and the outer boundary of the annular volume is defined in part by the walls of the ditch and in part by a generally horizontal member closing the opening of the ditch over such cylindrical members and the cylindrical members are designed so that, by counter rotating the cylindrical members with respect to each other, the cementitious material is continuously urged to move toward the open end of the annular volume and circumferential frictional forces are applied thereto at the inner surface of such volume.
REFERENCES:
patent: 2734248 (1956-02-01), Gaudin
patent: 3096556 (1963-07-01), Woods
patent: 3193901 (1965-07-01), Lee
patent: 3534449 (1970-10-01), Blixt
patent: 3551537 (1970-12-01), Thomason
McNeill Charles T.
Silva Melba F.
Baldwin Robert D.
No-Joint Concrete Pipe Co.
LandOfFree
Apparatus and method for forming a cementitious conduit in situ does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for forming a cementitious conduit in situ, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for forming a cementitious conduit in situ will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-254541