U.S. patent number 3,845,939 [Application Number 05/312,573] was granted by the patent office on 1974-11-05 for composting apparatus.
This patent grant is currently assigned to Waste-Treat, Inc.. Invention is credited to David B. Waldenville.
United States Patent |
3,845,939 |
Waldenville |
November 5, 1974 |
COMPOSTING APPARATUS
Abstract
An apparatus for controlled compost processing of waste
materials to provide rapid and complete reduction to compost
material. The apparatus consists of a ground-supported enclosure
which includes slidecovered access openings; the enclosure further
including a longitudinally arrayed, rotatable agitation assembly
and material wetting assembly, each of which is periodically
actuatable to provide the requisite mixing and wetting functions.
Further, the apparatus is particularly adaptable to novel
shredder-grinder apparatus which is attachable through access
opening to the composting apparatus, and which serves to receive
waste material through a hopper input for introduction to an input
cylinder which includes a plurality of axially arrayed,
rotationally driven cutting elements operating in coaction with
alternating screening discs which provide final forced entry of
chopped waste material into the interior of the composting
apparatus enclosure.
Inventors: |
Waldenville; David B. (Oklahoma
City, OK) |
Assignee: |
Waste-Treat, Inc. (Oklahoma
City, OK)
|
Family
ID: |
23212088 |
Appl.
No.: |
05/312,573 |
Filed: |
December 6, 1972 |
Current U.S.
Class: |
366/151.1;
241/98; 435/290.2; 435/290.4; 435/286.5; 425/287; 241/66; 422/225;
366/157.1; 366/173.2 |
Current CPC
Class: |
C05F
17/90 (20200101); B01F 7/022 (20130101); C05F
17/971 (20200101); B01F 7/0025 (20130101); Y02W
30/43 (20150501); Y02W 30/40 (20150501); Y02P
20/145 (20151101) |
Current International
Class: |
B01F
7/02 (20060101); C05F 17/02 (20060101); B01F
7/00 (20060101); B01f 007/04 () |
Field of
Search: |
;23/259.1,259.2,259.3
;220/41 ;241/60,98 ;259/10,26,46,154 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Hornsby; Harvey C.
Assistant Examiner: Cantor; Alan
Claims
What is claimed is:
1. Composting apparatus comprising:
enclosure means of generally elongated shape and including side
walls and end walls defining a generally cylindrical internal
space, said enclosure means having at least one closeable access
aperture;
agitation means consisting of a shaft and a plurality of plates
secured to extend perpendicularly from said shaft, said shaft being
journally supported by said enclosure means end walls axially
through said cylindrical internal space;
wetting means including a water delivery pipe having a plurality of
spray nozzles attached in communication therewith, said pipe being
secured across the upper extremity of said cylindrical internal
space;
a water supply connected to said wetting means;
rotary drive means connected to said agitation means shaft;
an a-c source;
a solenoid valve connected in said water supply to control flow
therefrom;
electrical relay means connected to said a-c source and being
energizable to provide output electrical energization to said
solenoid valve means and said rotary drive means; and
temperature sensor means in communication with said enclosure means
internal space and energizable upon sensing of less than a
pre-determined temperature to cause energization of said electrical
relay means.
2. Composting apparatus as set forth in claim 1 which is further
characterized to include:
ground support means consisting of frame support members secured to
each end wall of said enclosure means.
3. Composting apparatus as set forth in claim 1 which is further
characterized in that:
said enclosure means side walls include a first loading access
aperture coverable by a sliding plate closure disposed at an upper
surface of said enclosure means side walls, and an unloading access
aperture covered by a sliding plate closure disposed at a bottom
location of said enclosure means side walls.
4. Composting apparatus as set forth in claim 1 wherein each of
said plurality of agitation means plates comprises:
a planar plate having one end formed linearly for affixture to said
shaft and having the other end formed as a fork-like structure
having a plurality of tines.
5. Composting apparatus as set forth in claim 4 which is further
characterized in that:
each successive one of said plates as secured along said shaft is
secured on the opposite side from the preceding plate across the
length of said shaft within the cylindrical internal space.
6. Composting apparatus as set forth in claim 1 wherein said rotary
drive means is an electric motor mechanically linked to provide
rotational drive output to said shaft.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates generally to composting apparatus and, more
particularly, but not by way of limitation, it relates to
improvements in waste material grinding and composting apparatus
enabling rapid and complete reduction to desirable compost
material.
2. Description of the Prior Art
The prior art includes a great many types of composting apparatus
as have been functionally and structurally dictated by their
particular compost process usages. Thus, there have been many
designs formulated for large scale commercial usage in combination
with various forms of digester systems, materials screening and
metal detection systems, plastic separators, etc., such systems
having been variously constructed for utilization of either aerobic
or anaerobic waste processing. Much less attention has been given
to development of what may be termed small scale composting units
or systems, e.g., composting apparatus suitable for utilization
about a single family dwelling or other similar usage wherein one
man can easily attend to the processing function. Further, the
prior art includes little or no teaching of compact composting
equipment which embodies specific structural features enabling
rapid compost processing as aided by additive bacteria and nutrient
materials.
SUMMARY OF THE INVENTION
The present invention contemplates composting apparatus which
includes support structure, accessible enclosure structure, and
periodically actuatable agitation and wetting assemblies, such
periodic actuation being controllable in accordance with
pre-settable electrical controlling equipment; further, the
invention contemplates a shredder/grinder structure including a
waste material input hopper and rotary driven chopping and
screening assembly which is coactive for introduction of finely
chopped waste material directly into the interior of the composting
apparatus enclosure.
Therefore, it is an object of the present invention to provide a
composting apparatus which enables rapid and complete composting of
waste material.
It is yet another object of the invention to provide composting
apparatus which is especially suitable for residential or home
usage to provide odor-free compost processing of relatively small
batches of waste material.
It is still another object of the present invention to provide a
composting apparatus which functions in coaction with a
shredder/grinder apparatus of selected capacity and function.
Finally, it is an object of the invention to provide a home
composting unit which enables the gardening enthusiast to return a
great volume of waste materials to the soil thereby to alleviate
waste disposal problems.
Other objects and advantages of the invention will be evident from
the following detailed description when read in conjunction with
the accompanying drawings which illustrate the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view in partial cutaway of a composting
apparatus constructed in accordance with the present invention;
FIG. 2 is a vertical section of the composting apparatus of FIG.
1;
FIG. 3 is a schematic block diagram of control apparatus utilized
in the present invention;
FIG. 4 is a vertical section of a shredder/grinder apparatus
constructed in accordance with the present invention; and
FIGS. 5A, 5B and 5C are planned views of screening discs as
utilized in the shredder/grinder depicted in FIG. 4.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring first to FIG. 1, a composting apparatus 10 consists of
ground support elements 12 and 14 consisting of ground support rods
16 and 18 having respective vertical support rods 20 and 22 affixed
thereto as by welding or the like. An enclosure 24 is then affixed
by suitable securing to be supported between the upper ends of
vertical support rods 20 and 22. The enclosure 24 is shown as being
a cylindrical shape having cylindrical side wall 26 and circular
end walls 28 and 28; however, the particular volumetric shape may
be varied in accordance with the exigencies of usage and
requirements of internal functional elements.
The composting enclosure 24 includes a loading aperture 30 which
may be secured closed by means of a sliding cover plate 32
supported between slide guides 34 as secured in suitable manner to
the outer surface of side wall 26. In like manner, an unloading
aperture 36 (see FIG. 2), formed in a lower extremity of composting
enclosure 24, is closed by means of a sliding cover plate 38
movable between parallel slide guides 40. Yet another access
aperture 42 is shown in dash-lines as provided near the circular
edge of end wall 29 to provide for entry of shredded or ground
material, as will be further described below.
Vertical support 22 is securely affixed to end wall 28 of enclosure
24 by such as a bearing block 44. Bearing block 44 may be secured
as by welding through end wall 28 and vertical support rod 22 to
provide journal support for a rotatable agitation shaft 46.
Similarly, the opposite end of shaft 46 is journaled through a
bearing block 48 as secured through each of enclosure end wall 29
and vertical support shaft 20. An outer end 50 of shaft 46 has
secured thereto a drive pulley 52 of selected radius, and pulley 52
is driven by means of a drive linkage 54 in engagement with a drive
pulley 56 which receives rotational output from a suitable electric
motor 58 (see FIG. 1 as secured along the lower portion of vertical
support rod 22. The motor 58 securing seat would preferably be made
adjustable in order to allow drive belt, or in other cases drive
chain or the like, adjustability.
The agitation shaft 46 is constructed to include a plurality of
agitation plates 60 as shown secured in alternating planar
relationship to the shaft 46 and extending across the axial length
of composting enclosure 24. The agitation plates 60 may be
constructed of suitably formed metal plates welded to shaft 46 and
each including such as extension times 62, 64 and 66 at their outer
extremity. The plates 60 with tines 62-66 embody a design which is
particularly suitable for home composting usage in processing of
leaves, grass cuttings, light waste, etc., however, it should be
understood that the particular shape is susceptible of variation
and particularly with repsect to processing of specialized forms of
waste. The agitation plates 60 are designed to be of a length such
that the body of revolution outlined during the rotation of shaft
46 allows a slight clearance relative to the inner side of
enclosure side wall 26, thereby to allow for placement of a wetting
pipe 68. The wetting pipe 68 is suitably secured across the
uppermost portion of composting enclosure 24 between a stopper
fixture 70 through side wall 29 and a feed-through fixture 72
secured through side wall 28. The wetting pipe 68 then includes a
plurality of spray nozzles 74 periodically disposed across the
interior of composting enclosure 24, and water is supplied via
liquid-tight affixture of feedthrough fixture 72 to a hose or
tubing 76 leading downward to a control box 78 which is suitably
secured at an accessible location. External water supply may be
supplied by permanent installation, but it is contemplated that
water be introduced through a garden hose 80 and garden hose
connector 82 affixed to control box 78.
Referring now to FIG. 3, the control box 78 is indicated by
dash-line and includes a relay 84, a timer 86 and a solenoid valve
88 as energized by a suitable a-c source made available thereto.
The timer 86, e.g. a commercially available type of timed periodic
actuator, provides actuation via line 90 to close the control relay
84 such that closure of the a-c power circuit is available via line
92 to energize each of the solenoid valve 78 and the drive motor
58. Thus, timer 86 may be set for such as a three minute activation
each 12 or so hours so that sufficient periodic agitation and
wetting is carried out. That is, solenoid valve 88 is actuated to
allow spraying of mist from spray nozzles 74 for the pre-set
activation duration, and motor 58 is energized to provide rotation
of shaft 46 and plates 60 to repeatedly turn and fluff the waste
material within composting enclosure 24.
FIG. 2 also shows an alternative form of rotary actuator 94 which
may be such as an electric motor and reduction gear box supported
by attachment of a suitable support 96 to vertical rod 22, and
connected for direct drive of shaft 46 and agitating plates 60.
Still further, rotary actuation of shaft 46 may be carried out
manually by means of a suitable crank means as it is only necessary
to turn and agitate the waste material for a short period of time
each day of processing. It is also contemplated to include a manual
switch within the circuitry of FIG. 3. so that motor 58 and
solenoid valve 88 can be energized at will as required during such
as loading of waste material, flushing of the internal space, etc.
Most commercially available timers employed as timer 86 include
manual actuation means operating in override of the timed actuation
output.
In operation, selected waste materials such as raked leaves, grass
clippings, pine needles, small twigs and grove rakings, and the
like, may be inserted through loading aperture 30 with addition at
that time of desired bacteria and/or enzyme additives to serve as
digestion activators. The cover slide plate 32 may then be closed
and timer 86 of control box 78 set to provide for periodic
activation to supply misted water spray via spray nozzle 74 during
agitation via shaft 46 and paddles 60. The vertical supports 12 and
14 may be of proper height and spacing to allow packing of a yard
cart or wheelbarrow directly under the apertures 30 and 36, thus to
aid in loading and unloading of enclosure 24.
Still another alternative may be employed in the form of a
temperature sensor 100 (FIG. 3) providing actuation of relay 84 via
linkage 102 upon sensing of less than a pre-determined temperature
near the lower extremities of composting enclosure 24. Temperature
sensing may be carried out by conventional structure such as
thermocouple affixure or the like. Thus, after each agitation, as
the composting activation begins and digestion proceeds the
temperature rises and then falls as the digestion process subsides.
As the internal waste mass cools, temperature sensor 100 may be set
to activate relay 84 to re-wet and reagitate the mass thereby to
initiate a new cycle of digestion with its characteristic heating
and then cooling to normal or ambient temperature. Compost testing
of selected leaf matter has indicated increase in temperatures
upwards of 140.degree.F.
FIG. 4 illustrates a composting unit 10 in conjunction with a
shredder/grinder unit 110 which is readily connectable via aperture
42 (FIG. 1) in coactive association therewith. The shredder 110
consists of a suitable hopper configuration 112 in connection with
a shredder conduit 114 formed from suitably selected steel material
to include an elbow portion 116 and a cylindrical portion 118
through which the shredder processing is carried out. A support
structure 120 provides support for both the shredder conduit 114
and an electrical drive motor 120 of selected horse power rating,
speed, etc. A flange 112 is provided on the end of shredder
cylinder portion 118 in order to provide a bolting surface for
secure affixure to end wall 29 when shredder unit 110 is in proper
alignment with aperture 42.
The motor 120 is connected via a coupling 124 and journal entry 126
through the elbow portion 116 of shredder conduit 114, to impart
rotational motion to a drive shaft 128 which has affixed thereto a
series of chopper-impeller blades 130, 132 and 134. The
chopper-impeller blades may each be of similar formation to include
a plurality of radially extending chopper blades each turned at a
pitch to impart impeller action of the chopped waste material
inward toward aperture 42. A series of screening discs 136, 138 and
140 are disposed inwardly adjacent each of the respective
chopper-impeller blades 130, 132 and 134. The screening discs are
as shown in FIGS. 5A, 5B and 5C with each having a respective
central bearing block 142, 144 and 146 for supporting the drive
shaft 128 therethrough. It may be noted, too, that screening holes
148, 150 and 152 of each of screening discs 136, 138 and 140 are
reduced in size in accordance with their increased proximity to
entry aperture 42 of composting enclosure 24. Thus, and by way of
example, the most external screening disc 136 may have such as 1
inch holes 148 disposed in concentric array, while the next more
proximate screening discs 138 has 3/4 inch holes 150 and the
nearest screening disc 140 has 1/2 inch holes 152. The size and
number of holes as well as their particular array about the
screening discs are a matter of choice depending upon the material
being processed or shredded for composting. It may also be
desirable to optimally shape the external faces of each of the
screening discs 136-140 to provide for the least coagulating flow
of shredded materials therethrough. Commercial construction would
also probably dictate the inclusion of access panels in shredder
conduit 114 for purposes of cleaning and flushing.
The shredder unit 110 when used in combination with the composting
unit 10 provides a complete and efficient waste processing system
which can be used around homes or other smaller installations
having lesser waste requirements. Pre-shredding of the input waste
material has several favorable effects on the composting process.
It causes the surface area of material on which micro-organisms can
multiply to be greatly increased; the texture of the mass is
improved because the shredded materials have less tendency to mat
or pack down; moisture control capability is improved; and, the
agitation of the composting waste material is made much easier.
The present invention can be used to accomplish quick, odorless
composting and can even be operated in an enclosed space such as a
garage without causing unpleasant odors or deleterious effects.
This odor-free attribute is accomplished due to the fact that
during the repetitive composting process, the heat generation
periods cook out the odors normally associated with manure, garbage
and other wastes, and the micro-organisms use the carbon available
for conversion to carbon dioxide. The conversion process reduces
the bulk mass thereby to cause enrichment of the material.
The foregoing discloses novel apparatus for enabling fast and
efficient composting of smaller bulk amounts of waste material. The
apparatus is suitable for use with any of the various and diverse
types of waste, e.g., any of the nitrogen rich, carbohydrate rich
or cellulose rich waste materials, and it is probable that the
gardening enthusiast will contribute waste proportions in
accordance with his particular soil enrichment requirements. Use of
the shredder-composting apparatus combination, especially as
employed to greatest efficient with bacterial and bacteria-nutrient
additives, enables production of high quality compost material in
as little as three days, which process can be repeated indefinitely
to provide more than an adequate quantity of soil enrichment
material for the average home owner or groundskeeper.
Changes may be made in the combination and arrangement of elements
as heretofore set forth in the specification and shown in the
drawings; it being understood that changes may be made in the
embodiments disclosed without departing from the spirit and scope
of the invention as defined in the following claims.
* * * * *