Concrete mixing system

Claim 2

In a concrete mixing system, a mixer open at the top and having a tubular discharge spout, a hopper detachably mounted on the mixer, a conveyor having a belt having a receiving portion adjacent and spaced from the spout, and a seal mounted on the spout and engaging the belt at the sides and rear of the spout and open at the front of the spout to permit mix to be conveyed away from the spout.

Claim 3

The concrete mixing system of claim 1 wherein the seal is a flexible strip.

Claim 4

The concrete mixing system of claim 2 wherein the strip is generally U-shaped.

Claim 5

The concrete mixing system of claim 1 wherein the mixer includes a container in which the lower portion is cylindrical, and paddle means for moving mix out of an exit in the lower portion of the container.

Claim 6

In a concrete mixing system, a container having a lower portion which forms a portion of a generally horizontal cylinder, a shaft rotatable in a predetermined direction on the axis of the cylinder, the shaft having tapered bores extending transversely therethrough, a plurality of arms having tapered portions fitting in the tapered bores and threaded portions, a plurality of nuts screwed onto the threaded portions of the arms to fix the arms to the shaft in rotationally adjusted positions relative thereto, and a plurality of flexible wiper paddles mounted on the arms.

Claim 7

In a concrete mixing system, a container having a lower portion which forms a portion of a generally horizontal cylinder, a shaft rotatable in a predetermined direction on the axis of the cylinder, the shaft having tapered bores extending transversely therethrough, a plurality of arms having tapered portions fitting in the tapered bores and threaded portions, a plurality of nuts screwed onto the threaded portions of the arms to fix the arms to the shaft in rotationally adjusted positions relative thereto, and a plurality of flexible wiper paddles mounted on the arms.

Claim 8

The concrete mixing system of claim 5 wherein the paddles include planar flexible wiper blades and clamp means on the arms holding the central portions of the paddles.

Claim 9

The concrete mixing system of claim 6 wherein end ones of the paddles are so sloped relative to the shaft and direction of rotation of the shaft as to feed mix along the container away from the ends of the container and others of the paddles are so sloped relative to the shaft and direction of rotation of the shaft as to feed the mix toward the ends of the container.

Claim 10

The concrete mixing system of claim 7 wherein the container has a discharge opening in the lower portion thereo and said direction of rotation of the shaft is revolved in a direction in which the paddles are sloped to push mix toward the opening.

Claim 11

In a concrete mixing system, a container having a lowEr portion which forms a portion of a generally horizontal cylinder, a shaft rotatable on the axis of the cylinder, a plurality of rams mounted on the shaft, a plurality of wiper paddles mounted on the arms, a pair of outboard bearing means mounted on the outsides of the ends of the container and journaling the shaft, labyrinth seal means on the container sealing the shaft to the container and having recesses filled with concrete, a pair of sealing plates having inner annular grooves secured to the ends of the container inwardly from the bearing means, a pair of collars keyed to the shaft and having annular plates extending loosely into the grooves in the sealing plates, and fillers of concrete filling the spaces between the sealing plates and the collars.

Claim 12

In a concrete mixing system, a container having a lowEr portion which forms a portion of a generally horizontal cylinder, a shaft rotatable on the axis of the cylinder, a plurality of rams mounted on the shaft, a plurality of wiper paddles mounted on the arms, a pair of outboard bearing means mounted on the outsides of the ends of the container and journaling the shaft, labyrinth seal means on the container sealing the shaft to the container and having recesses filled with concrete, a pair of sealing plates having inner annular grooves secured to the ends of the container inwardly from the bearing means, a pair of collars keyed to the shaft and having annular plates extending loosely into the grooves in the sealing plates, and fillers of concrete filling the spaces between the sealing plates and the collars.