Abstract A machine for coating pipe, making use of a dry mixture of coating materials, such as hydraulic cement, sand or gravel, and weight imparting material such as barite, iron oxide, or the like. The machine has a rotary impeller for projecting the dry mix from a supply source of the same toward the pipe to be coated, and includes moistening means, such as a water spray, through which the dry mixture passes after leaving the impeller to form a wet mixture which is impelled against the pipe. Means is provided for feeding the dry mix to the impeller in a substantially constant, regulated stream and for controlling the amount of water added whereby the consistency of the coating can be regulated. Mechanism is provided for causing the dry mix and water to be supplied simultaneously, automatically upon operation of the machine, and for independently regulating the flow of dry mix as well as the flow of water while the machine is in operation.
The apparatus of claim 1 further including means on said impeller adapted for selectively varying the rotational path of said blades in relation to said vertical path of cementitious materials falling through said housing.
Claim 2
Dependent Claim
42 words
The apparatus of claim 1 further including means adapted for selectively varying the angular positions of said blades on said shaft to change the rotational path of said blades in relation to said vertical path of cementitious materials falling through said housing.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 wherein said blades are respectively curved forwardly in relation to the rotational direction of said impeller.
Claim 4
Dependent Claim
42 words
The apparatus of claim 4 further including means adapted for selectively varying the angular positions of said blades on said shaft to change the rotational path of said blades in relation to said vertical path of cementitious materials falling through said housing.
Claim 5
Dependent Claim
31 words
The apparatus of claim 1 wherein said water-introducing means include spray-producing means adapted for directing a spray of water downwardly into cementitious materials being propelled downwardly and away from said outlet.
Claim 6
Dependent Claim
23 words
The apparatus of claim 1 further including means arranged above said housing and adapted for selectively introducing dry cementitious materials into said inlet.
Claim 7
Dependent Claim
56 words
The apparatus of claim 7 wherein said water-introducing means include spray-producing means adapted for directing a spray of water downwardly into cementitious materials being propelled downwardly and away from said outlet, and control means responsive to rotation of said impeller for spraying water into such cementitious materials only so long as said impeller is being rotated.
Claim 8
Dependent Claim
28 words
The apparatus of claim 8 further including means coupled to said material-introducing means and adapted for regulating the rate at which such materials are introduced into said inlet.