Abstract: A twin shaft “compulsory mixer” having a capacity in the range of twelve cubic yards has a static mixing chamber bottom defined from two horizontally disposed and interfering cylindrical shapes. Two centrally disposed elongate rectilinear discharge gates are each defined from an end in the bottom of the static mixing chamber to abut at the middle of the static mixing chamber. At the middle bottom of the static mixing chamber, a tensioning rod is placed extending normally across the abutted ends of the two rectilinear slots. Two eccentrically mounted elongate rectilinear gates are mounted for movement into and out of sealing relation to the rectilinear slot centrally of the static mixing chamber. These gates are mounted centrally of the mixing chamber to a pillow block and spherical bearing arrangement and actuated at the respective static mixer chamber ends by conventional piston drives. Reducing the gates in length, reduces deflection making chamber sealing possible.

Abstract: A slipform paver having a dowel bar inserter pan. The inserter pan has a plurality of dowel bar receiving stations therein. The inserter pan is movable relative to the suspended slip form such that the pan moves towards and away from the slip form during dowel bar insertion.

Abstract: A twin shaft “compulsory mixer” having a capacity in the range of twelve cubic yards has a static mixing chamber bottom defined from two horizontally disposed and interfering cylindrical shapes. Two centrally disposed elongate rectilinear discharge gates are each defined from an end in the bottom of the static mixing chamber to abut at the middle of the static mixing chamber. At the middle bottom of the static mixing chamber, a tensioning rod is placed extending normally across the abutted ends of the two rectilinear slots. Two eccentrically mounted elongate rectilinear gates are mounted for movement into and out of sealing relation to the rectilinear slot centrally of the static mixing chamber. These gates are mounted centrally of the mixing chamber to a block and spherical bearing arrangement and actuated at the respective static mixer chamber ends by conventional piston drives. Reducing the gates in length, reduces deflection making chamber sealing possible.

Abstract: In combination with a slipform paver, a new chain feeder is disclosed which is contained within the profile of a slipform paver. The chain feeder is used in combination with a plurality of dowel bar inserter stations. A single file dowel bar path is provided immediately above the plurality of dowel bar inserter stations overlying an upper dowel bar shuttle for each inserter station. The feeder includes a plurality of feeding lugs for pushing dowel bars along the single file dowel bar path parallel to openings in the upper dowel bar shuttle. This enables dowel bars to fall into the upper dowel bar shuttle until all inserter stations are loaded with dowel bars. When the dowel bars are inserted, the upper dowel bar shuttle moves relative to the lower dowel bar shuttle. This permits an upper shuttle bar opening in the upper dowel bar shuttle and the lower shuttle bar opening in the lower dowel bar shuttle to move into registration one with another.

Abstract: A dowel bar inserter kit is used, typically in combination with a paver. The dowel bar inserter kit is removably detachable from the paver and includes at least two laterally extending support beams supported from the paver extending away from and behind the paver over the formed plastic concrete slab. A plurality of support carriages move synchronously on each laterally extending support beam towards and away from the supported frame of the paver. A suspended dowel bar inserter pan is attached at distal ends to the support carriages, the suspended dowel bar inserter pan defines apertures for insertion of dowel bars through the suspended dowel bar inserter pan. The dowel bar inserter pan has a medial dowel bar insert pan hinge to enable the suspended dowel bar inserter pan to crown with respect to the freshly placed plastic concrete slab. An inserter beam is supported at distal ends to the support carriages.

Abstract: In combination with a slipform paver, a new chain feeder is disclosed which is contained within the profile of a slipform paver and enables improved cycling time for the insertion of dowel bars. The chain feeder is used in combination with a plurality of dowel bar inserter stations. A single file dowel bar path is provided immediately above the plurality of dowel bar inserter stations overlying an upper dowel bar shuttle for each inserter station. The feeder includes a plurality of feeding lugs for pushing dowel bars along the single file dowel bar path parallel to openings in the upper dowel bar shuttle. This enables dowel bars to fall into the upper dowel bar shuttle until all inserter stations are loaded with dowel bars. When the dowel bars are inserted, the upper dowel bar shuttle moves relative to the lower dowel bar shuttle. This permits an upper shuttle bar opening in the upper dowel bar shuttle and the lower shuttle bar opening in the lower dowel bar shuttle to move into registration one with another.

Abstract: A dowel bar inserter kit has removable attachment to and from a slipform paver. The kit includes a track bolster on each side having a crossbeam tying the bolsters together at the rear of the inserter. Each bolster is provided with two flange attachments to the paver, typically one flange attachment to the frame and one flange attachment to the jacking column of the paver. These paired attachments of each side bolster assure the kit maintains the same overall level maintained by the rectilinear frame of the paver during paver travel. Each bolster defines support car tracks. These support car tracks enabling inserter support cars to travel on the tracks during machine paving. During dowel bar placement, the support cars remain stationary with respect to the formed slab while the slip form paver continues with its required forward motion. These support cars also enable vertical up and down movement to permit insertion and removal of the dowel bar inserters from the recently formed slab.

Abstract: A cross slope level/torsion control for mobile machines is disclosed. At least two crawler tracks or four wheels or rail bogies are provided for transporting and elevating the frame with at least one crawler track or two wheels or rail bogies on a reference side of the mobile machine and at least one crawler track or two wheels or rail bogies on cross slope side of the mobile machine. At least four jacking points having variable vertical extension are placed between the crawler tracks, wheels or rail bogies and frame with two jacking points being on the reference side of the mobile machine and two jacking points being on the cross slope side of the mobile machine. The reference side of the mobile machine tracks a reference in elevation and adapts a desired reference attitude. An attitude sensor on the reference side of the mobile machine measures the actual attitude of the reference side relative to gravity.

Abstract: A cross slope level/torsion control for mobile machines is disclosed. At least two crawler tracks or four wheels or rail bogies are provided for transporting and elevating the frame with at least one crawler track or two wheels or rail bogies on a reference side of the mobile machine and at least one crawler track or two wheels or rail bogies on cross slope side of the mobile machine. At least four jacking points having variable vertical extension are placed between the crawler tracks, wheels or rail bogies and frame with two jacking points being on the reference side of the mobile machine and two jacking points being on the cross slope side of the mobile machine. The reference side of the mobile machine tracks a reference in elevation and adapts a desired reference attitude. An attitude sensor on the reference side of the mobile machine measures the actual attitude of the reference side relative to gravity.