Magnetic roller and belt steel shot and grit pick up recovery machine

A machine to collect iron or steel shot or ferrous grit from factory plant floors for reuse in blast machines or other industrial processes. Round doughnut like magnets mounted on a through shaft are stacked together with like North and South poles adjacent one to another in or such as N-SS-NN-SS-NN-SS-NN-SS-NN-SS-NN-S. A drive system includes a floor engaging wheel and a lug pulley and belt drive connected to a gear drive connected to one end of the through shaft that mounts the end to end round magnets extending transversely substantially the width of the machine. A multi-pocketed flexible conveyor belt is passed around the shaft and end to end magnet assembly to extend therefrom up and around idler drum located upward and toward the rear, that being non-magnetic permits iron or steel shot and/or ferrous material grit to dump from the multipocketed belt down to the separating screen. Particles passed through the separating screen are held in a large hopper for delivery return to a supply bin or where desired. The machine is a wheeled unit easily pushed over a factory or foundry floor. Larger machines may be powered driven for ease of operation.

SUMMARY OF THE INVENTION 
This invention relates in general to recovery of iron and/or steel shot or 
ferrous grit from factory plant floors, and more particularly, to a 
magnetic roller and belt steel shot and ferris grit pick up recovery 
machine. 
There are various ways that iron and steel shot or ferrous grit escape 
blast cleaning machines such as through leaks, carry out and outright 
spillage. Such material spread out over a factory floor is quite hazardous 
with employees slipping and falling with the instability under foot 
created thereby. Other employees many times sweep it up comingled with 
other debris throwing it away just to get it out of the way with at the 
same time purchasing agents ordering more new material continually 
replacing that thrown away. Such ferrous metal shot and abrasive material 
consumption should be brought to a halt with a sensible recovery system 
for both safety reasons and to achieve substantial material savings. 
It is therefore a principal object of this invention to significantly 
reduce abrasive ferrous material consumption with respect to blast 
cleaning machines via magnetic pick up recovery of iron or steel shot from 
a factory or foundry floor. 
Another object with such recovery is to achieve savings and quick return on 
investment. 
A further object is to provide not only a decrease in clean up time but 
greater safety from employees slipping and falling on shot. 
Still another object is to lessen reclaim system requirements on exit ends 
of new blast cleaning machines. 
Another object is to lessen machine cabinet seal repair requirement 
expense. 
Features of the invention useful in accomplishing the above objects 
include, in a magnetic roller equipped pocketed belt conveyor iron and 
steel shot and grit pick up recovery machine, a short magnetic roller belt 
conveyor system on wheels that clears a fifteen inch or wider path of any 
ferrous abrasive material from the floor surface, carries it some three to 
five feet dumping the ferrous material into a screen for removing large 
objects and through the screen into a hopper receiving recovered ferrous 
abrasive material The hopper can be emptied from the bottom or removed and 
emptied. It is a machine useful in collecting iron or steel shot or 
ferrous grit from factory plant floors for reuse in blast machines or 
other industrial processes. Round doughnut like magnets mounted on a 
through shaft are stacked together with like North and South Poles 
adjacent one to another in orientation or such as 
N-SS-NN-SS-NN-SS-NN-SS-NN-SS-NN-S. A floor engaging wheel is lug pulley 
and belt drive connected to a gear drive connected to one end of the 
through shaft that mounts the end to end round magnets extending 
transversely substantially the width of the machine. A multi-pocketed 
flexible belt is passed around the shaft and end to end magnet assembly to 
extend therefrom up and around the idler drum located upward and toward 
the rear, that being non-magnetic permits iron or steel shot and/or 
ferrous material grit to dump from the multi-pocketed belt down to a 
separating screen. Particles passed through the separating screen are held 
in a large hopper for delivery return to a supply bin or where desired. 
The machine is a wheeled unit easily pushed over a factory or foundry 
floor. Larger machines may be powered driven for ease of operation. 
BRIEF DESCRIPTION OF THE DRAWINGS 
A specific embodiment representing what is presently regarded as the best 
mode of carrying out the invention is illustrated in the accompanying 
drawings.

DETAILED DESCRIPTION OF THE DRAWINGS 
Referring to the drawings: 
The magnetic roller 10 and belt 11 steel and grit pick up recovery machine 
12 of FIGS. 1-3 is used to collect iron or steel shot or ferrous grit from 
factory plant floors or foundry floors for reuse in blast machines or 
other industrial processes. Referring also to FIG. 4 round doughnut like 
magnets 13 are mounted on through rotational drive shaft 14 between 
retainer disc 15 on the left and retainer disc 16 on the right with like 
North and South poles adjacent one to another in orientation such as 
N-SS-NN-SS-NN-SS-NN-SS-NN-SS-NN-S. The machine carriage 17 has front floor 
18 engaging wheels 19 and 20 with wheel 19 non rotatably fixed to shaft 21 
rotatably mounted in the carriage 17 bearings 22L and 22R and wheel 20 is 
rotatably mounted on shaft 21. Shaft 21 is extended on the left to a lug 
pulley 23 to drive a lug belt 24 that in turn drives lug pulley 25 that is 
drive connected via rotatable shaft 26, rotatably mounted on the carriage 
frame, to spur drive gear 27. Gear 27 meshes with and drives gear 28 
mounted on an outboard end 29 of shaft 14 for drive thereof and magnets 13 
mounted thereon. The belt 11 is a multi-pocketed 30 flexible belt 11 
passes around the shaft 14 and the end to end magnets 13 assembly mounted 
thereon and extends therefrom up and around an idler drum 31 upward and 
toward the rear of the machine 12 where the belt 11 as a conveyor belt 
running around non magnetic idler drum 31 permits iron or steel shot 
and/or ferrous material grit 32 transported in conveyor belt pockets 30 to 
dump from thr multi-pocketed 30 flexible belt 11 down to within the 
separating screen 33 structure. Non magnetic idler drum 31 is mounted on 
shaft 34 rotatably mounted by opposite end bearing assemblies 35L and 35R 
in order that pocketed belt 11 freely roll therearound to return back down 
to the magnetic roller 10 in continuing conveyor motion as induced by the 
lugged pulley and belt and gear drive thereto. 
Ferrous metal shot and grit passed through the screen structure 33, that 
holds back large objects not passed by the screen, fall into and are 
retained in hopper 36, that has the capacity for retaining many hundreds 
of pounds of recovered shot and ferrous grit, mounted on the rear end of 
the carriage 17. It is so positioned beneath the raised rear end of the 
conveyor belt 11 structure so as to receive recovered material dumped 
therefrom. The recovered material holding hopper 36 opposite bottom sides 
37L and 37R are slanted down to a bottom 38 the width of and 
longitudinally in alignment with the hopper dumping door 39 hinge 40 and 
lock rod 41 held in place on the bottom rear of hopper 36 for dumping from 
the hopper into a blast machine or to storage. This may be accomplished 
with the hopper 36 in place in the recovery machine or removed for dumping 
and return to the machine 12. Rear wheels 42L and 42R caster structures 
43L and 43R are mounted to the bottom of machine carriage 17 beneath the 
hopper 36 for support at the rear of the machine 12 particularly when the 
hopper 36 holds hundreds of pounds of recovered material. 
The machine 12 shown is a hand pushed unit with left side wheel 19 drive 
connected to drive the conveyor belt 11 structure in conveying 
magnetically recovered shot and grit from the front bottom magnetic pick 
up end to the raised rear dumping end and return down to the front bottom 
end. A transversely extended shield and bumper 44 is mounted at opposite 
side ends to the machine to protect the magnetic roller 10 from the front, 
and an additional shield 45 transversely extended over and to the rear of 
the rear end of the conveyor structure is mounted at opposite ends to 
opposite sides of the machine for conveyor protection. Wheel 20 being 
rotatably mounted on shaft 14 and rear wheels 42L and 42R being caster 
mounted contributes to ease of manual handling of the machine. Typically 
the machine described could clear a path twenty inches wide, or wider, of 
ferrous abrasive from a floor surface with each pass of the machine 
thereover. 
A standard model that is to be made available is twenty seven inches wide 
by forty two inches high by forty eight inches long, will weight (empty) 
approximately one hundred twenty pounds, and have a load capacity of eight 
hundred pounds recovered ferrous abrasive. While the embodiment enclosed 
has a ground wheel to conveyr drive, smaller units could have a rear top 
hand crank drive, and other units, particularly larger units, could be 
equipped with motor driven conveyor power drives and even ground engaging 
wheel motor drive. 
Whereas this invention has been described primarily with respect to a 
single embodiment thereof, it should be realized that various changes may 
be made without departure from the essential contributions to the art made 
by the teachings hereof.