Grinding mill
OwnerWilliam H. Lichfieldinventor
Life of this patent
Estimating the term…
Abstract
A grinding mill having a feeding chamber for directing grain between grinding stones where it is ground into flour and from where it is discharged into a turbine chamber. Means are provided for directing cooling air into the turbine chamber, across the rotating grinding stone, and centrifugally out of the housing through a tangential discharge nozzle. The relative position of the grinding stones is easily varied by using a control handle to move the drive shaft of the motor, on which the rotating grinding stone is mounted. The position of the control handle is fixed by wedging it to a portion of the mill housing.
Claims9
A grinding mill having
- a hopper;
- a hopper plate in the hopper, said hopper plate having an opening through which grain or the like is fed from the hopper;
- a fixed grinding stone beneath the hopper plate and having a downwardly facing grinding surface;
- a motor housing;
- a motor in said housing;
- a motor shaft driven by said motor and extending upwardly therefrom;
- a rotating grinding stone having an upwardly facing grinding surface carried by said motor shaft, said grinding surfaces of said fixed and rotating grinding stones being in face-to-face relationship, with a grinding chamber therebetween;
- turbine blades rotatable with said rotating grinding stone;
- means including a baffle plate in the hopper and spaced from the hopper plate and a wall projecting downwardly from said baffle plate to direct air from between the motor housing and hopper centrally to the rotating grinding stone for supplying cooling air across the bottom of said rotating grinding stone to said turbine blades at the peripheries of said stones;
- means mounting the hopper above the motor housing;
- a discharge spout extending tangentially from said hopper beneath the hopper plate to receive said air and entrained flour ground between and discharged peripherally from said stones;
- and
- openings through the motor housing whereby air is circulated from outside the housing around the motor.
A grinding mill having
- a hopper;
- a hopper plate in the hopper, said hopper having an opening through which grain or the like is fed from the hopper;
- a fixed grinding stone beneath the hopper plate and having a downwardly facing grinding surface;
- a motor housing;
- a motor in said housing;
- means mounting the hopper above the motor housing;
- a motor shaft extending through said motor and driven thereby;
- a rotating grinding stone having an upwardly facing grinding surface carried by said motor shaft above the motor, said grinding surfaces of said fixed and rotating grinding stones being in face-to-face relationship;
- turbine blades rotatable with said motor shaft around said fixed grinding stone;
- a plug threaded into a bottom of the motor housing;
- a bearing on the plug, said bearing journaling a lower end of the motor shaft projecting downwardly from the motor;
- and
- a handle fixed to the plug for turning of said plug, said handle projecting outwardly beyond the motor housing said handle having arcuate slots therein and including
- screws inserted through the arcuate slots into the plug, whereby the angular relationship of the handle to the plug is variable.
Dependencies are inferred from the claim text.