US 5,626,298 AGranted

Tub grinder with rear discharge hammer mill and angled shear plates

OwnerAdrian F. Arnoldyinventor

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Abstract

A tub grinder for grinding animal feed and the like of the type having a hammer mill extending below a stationary floor about which a tub side wall rotates, incorporates a rear discharge opening formed in a rear side wall of the hammer mill and includes deflector plates extending across an end wall of the grinder for directing material out the discharge opening to the rear of the tub grinder. Shear plates are adjustably secured to an end wall of the hammer mill housing. The shear plates are oriented in overlapping and angled relationship with respect to one another and to prevent ground materials from accumulating on the shear plates particularly when wet. Sickle blades are retractably positioned in the mill side walls for providing additional cutting action. Further, hammer assemblies are modified to include a knife edge and a face plate.

Claims28

Dependent claims

A tub grinder for chopping and grinding material comprising:

a. a frame;
b. a stationary floor secured to said frame and having a floor opening extending therethrough;
c. a tub side wall rotatably mounted relative to said floor for rotation thereabout by first rotating means;
said floor and said tub side wall forming a tub into which material to be processed is placed;
d. a mill having a mill housing including a first side wall, a second side wall and an end wall extending between said first and second side walls and which define a milling chamber;
said mill housing secured to said frame and extending below said floor such that said floor opening opens into said milling chamber;
e. a rotor rotatably secured within said mill housing and connected to second rotating means;
f. a plurality of hammer assemblies secured to and rotatable by said rotor for chopping and grinding material in said milling chamber;
at least a portion of each of said hammer assemblies extending above said floor along a portion of the path of travel of said hammer assemblies during rotation for cutting and pulling material into said milling chamber;
g. at least one of said side walls of said mill housing having a discharge opening formed therein adjacent a portion of said mill housing end wall;
and
h. deflecting means for deflecting material in said milling chamber out said discharge opening.

9 more elements

An apparatus for chopping and grinding material comprising:

a. a material receiving receptacle having a mill opening extending therethrough;
b. a mill having a mill housing including a first side wall, a second side wall and an end wall extending between said first and second side walls and which define a milling chamber;
said mill housing secured to and extending below said material receiving receptacle such that said mill opening opens into said milling chamber;
c. a rotor rotatably secured within said mill housing and connected to rotating means for rotating said rotor;
d. a plurality of hammer assemblies secured to and rotatable by said rotor for chopping and grinding material in said milling chamber;
at least a portion of each of said hammer assemblies extending into said material receiving receptacle along a portion of the path of travel of said hammer assemblies during rotation for cutting and pulling material into said milling chamber;
e. at least one of said side walls of said mill housing having a discharge opening formed therein adjacent a portion of said mill housing end wall;
and
f. deflecting means for deflecting material in said milling chamber out said discharge opening.

6 more elements

Dependencies are inferred from the claim text.