US2756001A - Soil and compost shredder with foreign object discharge door - Google Patents

Description

July 24, 1956 L. N. KEMP SOIL AND COMPOST SHREDDER WITH FOREIGN OBJECT DISCHARGE DOOR Filed Sept. 13, 1952 FIG.3

3nnentor K E M P LY MA N aw KM Gttomeg nited States Patent Ofice 2,756,001 Patented July 24, 1956 SOIL AND COMPOST SHREDDER WITH FOREIGN OBJECT DISCHARGE DOOR Lyman N. Kemp, Erie, Pa.

. Application September 13, 1952, Serial No. 309,471 3 Claims. Cl. 241-82 This invention relates to shredding machines and more particularly to means for shredding soil, leaves, compost, and the like.

In shredding machinesutilizing a rotating cylinder to pulverize soil, leaves, and compost and force the shredded parts therof through a screen, it has long been a problem to prevent injury to the rotating cylinder and other parts of the shredding machine when stones and other foreign objects are accidentally dropped into the machine with the material being shredded and they come into contact with the rotating drum and screen. The usual practice when an obstruction such as a stone gets into the machine has been to stop the machine and remove the obstruction, however, by the time the machine can be stopped, considerable damage is usually done to the working parts of the machine.

It is, accordingly, an object of my'invention to overcome the above and other defects in shredding machines by providing a means whereby stones and other foreign objects may be readily and quickly removed from shredding machines before damage has occurred to the machine.

It is a further object of my invention to provide an improved shredding machine.

Another object of the invention is to provide a means for removing stones and other foreign objects from a sherdding machine which will be simple in construction, economical in manufacturing cost, and convenient in operation.

Other objects of my invention will become evident from the following detailed description, taken in conjunction with the accompanying drawings, in which Fig. 1 is a side view of a shredding machine according to my invention having the side shown broken away to better illustrate the parts thereof;

Fig. 2 is a cross sectional view taken on line 22 of Fig. 1; and

Fig. 3 is a detailed view of the screen of the machine shown in Fig. 1.

Referring now to the drawings, Fig. 1 shows a soil and compost shredding machine having a frame 1 supported at one end thereof by legs 2 and at the other end thereof by wheels 3. Wheels 3 are attached to frame 1 by axles 14. Body member 4 is supported on the frame 1. The legs 2 are provided with brace members 5 which hold the legs 2 in rigid relation to the frame 1. Handles 6 extending rearwardly from frame 1 terminate in hand engaging members 7. Rotatably mounted in the body member of the machine is drum member 10 supported at either end thereof by journal members 11 and having hammer members 12 secured at spaced locations around the periphery of the drum. The drum 10 is driven by motor 20. Motor 20 is mounted on base 21 and base 21 is mounted on frame 1. The motor 20 drives the drum lll through belt 22. Screen 30 is disposed at the lower portion of the body member and is curved at 31 to conform generally to the path of travel of the hammers 12 on the drum 10 as drum 10 rotates in journals 11.

Screen 30 is provided with holes 33 through which the material being shredded is forced by hammers 12. A hopper 8 is disposed at the top of the machine body 4 for receiving the material to be shredded and battle 34 is secured to the rearward portion 9a of the hopper member 8 in substantially normal relation to drum 10 to guide the material from the hopper 8 to the drum 10.

The hopper 8 is provided with flared sides 9 and 9a for more easy loading of the machine. The rearward wall 40 of the machine is hinged at 41 to the body 4 of the machine and is swingable rearwardly thereabout. The lower portion of the rearward wall of the machine has angle member 42 attached thereto and terminates in handle member 43. Angle member 42 has return spring 44 attached thereto at 45 and the other end of the spring 44 is connected at 46 to angle member 47 and angle member 47 is secured to frame 1 by welding or other well known means. Baffle 34a is pivotally mounted to the sides of the body member by rod 35. The pivot rod 35 is journalled in plate 35g and plate 35g is secured to sides 35!: by welding, brazing, or similar fastening means. Crank 350 is attached to pivot rod 35 and bafile 34a is urged in a clockwise direction by spring 35@ which is attached to sides 35b at 357. When large lumps of soil or compost are driven against baffle 34a by teeth or hammers 12 on drum 1t), bafie 34a will pivot in a counterclockwise direction to allow the lump to pass between it and teeth 12.

In the operation of the machine, the motor 2i drives the drum 10 in a clockwise direction by means of the belt-22. Material, such as leaves, manure, compost or soil, is put into the hopper 8 and is directed by drum it between bafiie 34a and hammers 12. The hammer members 12 force the material between the bafiie member 34a, thereby disintegrating the larger pieces of the material. The material is then driven by the hammers 12 past screen 30 and forced through the holes 33 of the screen 30.

In case of a foreign object such as a rock being inadvertently fed into the machine, the hammers 12 will force the rock around past the screen 30 and by centrifugal force as indicated by the arrow in Fig. 1. The rock will be thrown up against baffle plate 34. The rock will then fall against wall 46 and roll down into contact with hammers 12 and be again projected against baffle 34. The noise of the rock striking the battle plate 34 will warn the operator that a foreign object is present in the machine. The operator can grasp handle 43 and pivot the rear wall 40 around hinge 41 to the dotted line posi tion 40a and the rock will fall downward out of the machine. When the operator releases the handle 43, the wall 40 will be closed and held in closed position by return spring 44.

In previous machines, no means was provided for ejecting foreign objects. When a stone was inadvertently put into a machine, the stone was driven around and around by the drum 18 past the screen, thereby doing considerable damage to the machine before the machine could be stopped. By constructing the machine according to my disclosure, it is possible to remove stones or other foreign objects from the machine before any damage is done to the Working parts of the machine. Considerable time is also saved since the machine does not have to be stopped to remove the stone.

Various changes may be made in the specific embodiment of my invention without departing from the spirit thereof or from the scope of the appended claims.

What I claim is:

1. A soil shredded comprising a hollow body having a drum rotatably disposed therein, an opening at the top of said body for admitting material to be shredded, a discharge for shredded material adjacent the bottom of said body, a discharge opening for foreign materialin one side of said body, a closure for said discharge opening swingably attached at the top of said opening, and a baffle in said body attached thereto and extending downwardly and toward said drum and disposed generally radially thereof substantially the entire length of said closure and overlying said discharge opening for foreign objects and adapted to deflect foreign objects from their path around said drum whereby said objects fall into engagement with said closure, said opening for admitting material being disposed above said bafile, said closure for said opening extending downwardly and toward said drum at an acute angle to said baffle.

2. A soil shredder comprising a hollow body having a drum rotatably disposed therein, an opening at the top of said body for admitting material to be shredded, a discharge for shredded material adjacent the bottom of said body, a discharge opening for foreign material in one side of said body, a closure for said discharge opening swingably attached at the, top of said opening, a baffie in said body attached thereto and extending downward and toward said drum and disposed generally radially thereof and substantially the entire length of said closure and overlying said discharge opening for foreign objects and adapted to deflect foreign objects from theirpath around said drum whereby said objects fall into engagement with said closure, said opening for admitting material being disposed above above said bafile, said closure for said opening extending downward and toward said drum at an acute angle to said baifle, and spring means connected to said closure and said body urging said closure to a closed position, said closure having manually urged means thereon to an open position against the force of said spring to discharge foreign objects from said body.

3. A soil shredder comprising a hollow body having a 4 drum rotatably disposed therein, a hopper discharging material through an opening in the top of said body for admitting material to be shredded, a discharge for shredded material adjacent the bottom of said body, a discharge opening for foreign material in one side of said body, a closure for said discharge opening swingably attached at the top of said opening, a bafile in said body attached thereto and extending downward and toward said drum and disposed generally radially thereof and substantially the entire length of said closure and overlying said discharge opening for foreign objects and adapted to deflect foreign objects from their path around said drum whereby said objects fall into engagementwith said closure, said opening for admitting material being disposed above said batfie, said closure for said opening extending downward and toward said drum at an acute angle to said baffle, and a second bafile swingably attached to the inside of said body adjacent said drum on the opposite side of said opening from said first mentioned bafiie.

References Citedthe file of this patent UNITED STATES PATENTS

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