U.S. patent number 3,586,238 [Application Number 04/798,096] was granted by the patent office on 1971-06-22 for plant treating apparatus adapted to be carried on a person's back.
This patent grant is currently assigned to Andrieas Stihl. Invention is credited to Heinz Schmierer, Hans Peter Stihl, Gerhard Zerrer.
United States Patent |
3,586,238 |
Schmierer , et al. |
June 22, 1971 |
PLANT TREATING APPARATUS ADAPTED TO BE CARRIED ON A PERSON'S
BACK
Abstract
A portable plant treating apparatus, especially for spraying,
dusting, and fog laying, which includes: a plurality of container
means arranged adjacent to each other and connected to each other
for respectively storing fuel and the plant treating substance to
be discharged, fuel driven motor means arranged below said
container means and having a crankshaft, blower means drivingly
connected to and arranged below said motor means and having its
axis of rotation is substantially axial alignment with said
crankshaft, discharge conduit means communicating with said blower
means and with the container means containing the plant treating
substance, and strap-equipped carrier plate means connected to one
of said container means for carrying the apparatus on the back of a
person.
Inventors: |
Schmierer; Heinz (Maichingen,
DT), Stihl; Hans Peter (Hochberg, DT),
Zerrer; Gerhard (Korb, DT) |
Assignee: |
Andrieas Stihl
(Maschinenfabrik, Waiblingen, DT)
|
Family
ID: |
5681383 |
Appl.
No.: |
04/798,096 |
Filed: |
February 10, 1969 |
Foreign Application Priority Data
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Feb 9, 1968 [DT] |
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16 07 404 |
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Current U.S.
Class: |
239/153;
123/2 |
Current CPC
Class: |
B05B
7/1413 (20130101); A01M 11/00 (20130101); B05B
7/1427 (20130101); B05B 7/2427 (20130101); B05B
7/2475 (20130101) |
Current International
Class: |
A01M
11/00 (20060101); B05B 7/24 (20060101); B05B
7/14 (20060101); B05b 009/08 () |
Field of
Search: |
;239/152,153,154 ;123/2
;222/175 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Wood, Jr.; M. Henson
Assistant Examiner: Mar; Michael Y.
Claims
What we claim is:
1. A portable plant treating apparatus especially for spraying,
dusting, and fog laying, which includes: a plurality of container
means arranged adjacent to each other and connected to each other
for respectively storing fuel and the plant treating substance to
be discharged, fuel driven motor means arranged below said
container means and having a crankshaft, blower means drivingly
connected to and arranged below said motor means and having its
axis of rotation in substantially axial alignment with said
crankshaft, discharge conduit means communicating with said blower
means and with the container means containing the plant treating
substance, strap-equipped carrier plate means connected to one of
said container means for carrying the apparatus on the back of a
person, and carburetor means located between said motor and said
carrier plate means.
2. An apparatus according to claim 1, in which said motor means
includes cylinder means having said carburetor flanged thereto, and
in which an air filter is located between said carburetor and said
carrier plate means.
3. A plant protective device adapted to be carried on a back for
selective discharge of spray, dust, fog, sprinkling and granulated
means, comprising: a back carrier plate and a container combination
for fuel and discharge means, a drive motor with a vertically
arranged crankshaft having upper and lower ends, a blower means
with a discharge passage arranged at said crankshaft lower end and
having its axis of rotation in axial alignment with said
crankshaft, a starter arranged at said crankshaft upper end, and a
cylinder with an axis of said drive motor adjacent to the discharge
passage lying in a horizontal plane approximately parallel to said
back carrier plate.
4. A device according to claim 3, in which said drive motor with
starter, blower means and discharge passage are in a unit
releasably connected to said back carrier plate.
5. A device according to claim 3, in which there is a carburetor
arranged between said drive motor and said back carrier plate.
6. A device according to claim 5, in which said carburetor is
mounted directly on said cylinder of said drive motor, and an air
filter is secured between said carburetor and said back carrier
plate.
7. A device according to claim 3, in which shoulder strap means are
releasably secured at upper ends thereof between said back carrier
plate and discharge means container.
8. A device according to claim 7, in which hexagonal nuts are
embedded in wall means of said container for discharge means, and
screw bolts are receivable by said nuts for securing said strap
means ends and said carrier plate.
Description
The invention concerns a plant treating apparatus adapted to be
carried on a person's back for selectively distributing or
discharging scattering material, dustlike material, smoke producing
material, spraying material or granulated material, and provided
with a container combination arranged above a driving motor and a
blower drivingly connected therewith and having its axis extending
substantially vertically. The apparatus furthermore comprises a
discharge conduit connected to the blower and said container, and
also comprises, for instance, a carrier plate with straps adapted
to be carried on the back of a person.
It is an object of the present invention to provide a plant
treating apparatus of the above-mentioned general-type which will
be simple in construction and will have a high degree of
efficiency.
This object and other objects and advantages of the invention will
appear more clearly from the following specification in connection
with the accompanying drawings, in which:
FIG. 1 represents a section through a plant treating apparatus
according to the invention as seen from the rear and partly in
section.
FIG. 2 shows the apparatus according to FIG. 1 likewise as seen
from the rear but partly in vertical section.
FIG. 3 is a side view of the apparatus according to the invention
partly in vertical section.
FIG. 4 is a horizontal section taken along the line IV-IV of FIG.
2.
FIG. 5 shows the front end of the discharge conduit partly in view,
while the front portion illustrated in axial section is shown
turned relative to the rear portion by 90.degree..
FIG. 6 represents a section taken along the line VI-VI of FIG.
5.
The apparatus according to the present invention is characterized
primarily in that the blower is arranged below the motor so that
the motor is arranged between the blower and the container. In view
of this arrangement, the motor can be placed directly upon the
blower which greatly simplifies the entire structure while
simultaneously the accessories to the motor, such as the
carburetor, ignition device, and in particular the starter, are
easily accessible. Furthermore, the blower will in this arrangement
be so located that the discharge conduit does not have to be curved
which means that the blower airflow will be subjected only to a
slight power loss.
According to another advantageous further development of the
present invention, the shoulder straps for the supporting means of
the apparatus on the back of a person are at the upper area
directly connected to the container. This brings about a better and
safer support for the container which contains the substance to be
distributed and which in filled condition represents the heaviest
part of the apparatus. Inasmuch as in this way the supporting
device and in particular the supporting plate to be carried on the
back of a person are not directly under the load of the weight of
the container, the supporting device can be designed considerably
lighter and simpler.
Referring now to the drawings in detail, the apparatus shown in
FIGS. 1 to 4 comprises a supporting or back-carrying device 1 with
a curved and ribbed supporting plate 2 preferably of a light
synthetic material. At the back side of the plate 2 and, more
specifically, within the upper area thereof, there is provided a
container 3 for the substance to be distributed. Below the
container 3 there is arranged a fuel tank 4 which with the specific
example shown in the drawings, together with the container 3 forms
a structural unit, while below said structural unit there is
provided a one cylinder two-stroke cycle engine 5. Below the engine
5 there is provided a radial blower 6 which is drivingly connected
to the engine 5.
That wall portion 7 of the container 3 which is adjacent to the
supporting device 1 and is located below the upper edge 8 of the
supporting plate 2 is provided with two horizontally located
adjacent hexagonal nuts 9 which are embedded without a passage in
the wall 7. The wall 7 has also within the area of the nuts 9 the
same thickness as in other parts. The pocket-shaped recesses of the
wall 7 of the container 3 for the nuts 9 are respectively provided
with an inwardly protruding annular extension 10 which engages a
corresponding circumferential groove adjacent the respective nut 9
pertaining thereto so that the said nut is in its axial direction
positively held on the wall 7. Screws 11 forming connecting members
are screwed into the said two horizontally located adjacent nuts 9
which are arranged symmetrically with regard to the vertical plane
which is perpendicular to the supporting plate 2. The said screws
11 are provided with heads which are arranged in corresponding
countersunk portions at the front side of the plate 2 so that they
do not protrude beyond the front surface of the plate 2 which will
engage the back of a person carrying the apparatus. Between the
plate 2 and the horizontally located adjacent nuts 9 there are
provided the upper ends 12 of two shoulder straps 13 of the
supporting device 1. The said upper ends 12 are provided with
corresponding passages for passing therethrough the connecting
screws 11 extending through the plate 2. The strap ends 12 are by
means of screws 11 firmly clamped between the supporting plate 2
and the nuts 9 and are from the connecting area below the upper
edge 8 of the plate 2 passed approximately vertically upwardly in
such a way that the shoulder straps 13 are bent forwardly at the
upper edge 8 of the plate 2 when the apparatus is carried on the
back of a person so that the load conveyed through the strap ends
12 onto the connecting screw 11 is only a load which acts
substantially perpendicularly with regard to the axial direction of
the connecting screws 11. The strap ends 12 are by the
above-described arrangement connected directly to the container 3
so that its weight will be held directly by the straps 13. At the
same time, the connecting screws 11 also serve for connecting the
transporting plate 2 to the container 3 so that the plate 2 is by
means of the same connecting screws as the container connected to
the shoulder straps. For further supporting the supporting plate 2
on the container 3, at least a further screw may be provided.
The fuel tank 4 is arranged directly at the bottom side (FIG. 1) of
the container 3 by means of a detachable locking connection 14, 15
so that the fuel tank 4 is suspended on the container 3.
The air-cooled engine 5 has a horizontally extending cylinder 16 as
is particularly clearly shown in FIGS. 2 and 4. The axis of the
cylinder 16 is approximately parallel to the plane of the
supporting plate 2. The said cylinder is directed toward the left
from the crankshaft 17. Above the crank housing 18 of the
crankshaft 17 which has a vertical axis, there is provided an
ignition system 19 for producing the igniting current, said
ignition system being coaxially arranged with regard to the
crankshaft 17 and being directly drivingly connected thereto. Above
the ignition system or dynamo 19 there is provided a starter 20 for
the engine 5 which starter is arranged coaxially with regard to the
crankshaft 17 and has a pulley 21 coaxially arranged to the
crankshaft 17. The pulley 21 is adapted by means of an automatic
free wheel clutch 22 located below the pulley 21 to be drivingly
connected with the crankshaft 17. The fuel tank 4 which is located
directly above the starter 20 has its lower wall provided with a
concavely arched recess formed out of said wall. The free diameter
of said recess corresponds substantially to the diameter of the
cover 23 which is located in said recess. When the container 4 is
filled or is otherwise loaded by a downwardly directed load, the
wall of said recess engages the top side of the cover 23 so that
the container 3 as well as the fuel tank 4 are centered on the
motor and supported thereby.
The lower portion of the crank housing 18 is formed directly by the
upper section 24 of the upper portion of the blower housing 25. The
blower housing 25 is thus directly connected to the motor 5, for
instance is flanged thereto. The blower wheel 26 in housing 25 is
directly arranged on the lower end of the crankshaft 17.
The blower housing 25 has an outer annular passage 27 which is of
substantially rectangular cross section and is formed by the upper
housing portion 51 and the lower housing portion. The cross section
of the annular passage 27 increases in the direction of rotation of
the blower wheel 26, said direction of rotation being indicated by
the arrow 28 (FIG. 4). The annular passage 27 leads on the
right-hand side of the apparatus, in other words on that side of
the crankshaft 7 which faces away from the cylinder 16, into a
connection 29 of the blower housing 25, said connection 29 being
directed outwardly at an incline with regard to the plane of the
supporting plate 2. The connection 29 is located in the horizontal
plane of the blower wheel 26. On that side of the cylinder 16 which
is located opposite to the exhaust muffler 30, in other words
between the cylinder 16 and the supporting plate 2, there is
located a carburetor 31 which in vertical arrangement is flanged
directly to the cylinder 16. The float chamber 32 of the carburetor
31 is easily accessible toward the circumference of the blower
housing 25 to thereby facilitate the actuation of the carburetor.
On that side of the carburetor 31 which faces away from the
cylinder 16, namely at the intake side of the carburetor 31, there
is provided an air filter 33 arranged in a housing. The air filter
housing is approximately parallel to the supporting plate 2 and
extends approximately over the entire width of said plate 2.
The above-described motor-blower unit which represents a structural
unit closed in itself is at three places connected to the plate 2
in the lower part thereof through the intervention of rubber
elastic bearings 34, 35. In view of the above design, the
motor-blower unit is connected to the lower part of the supporting
plate 2 exclusively at three places provided at the tips of an
isosceles triangle arranged in a vertical plane. The connection
between the motor-blower unit and the supporting plate 2 is formed
exclusively by rubber elastic elements.
As will furthermore be evident from FIGS. 1 and 2, the pull rope 36
wound onto the pulley 21 and pertaining to the starter 20 is passed
through a corresponding opening in the cover 23 directly below the
fuel tank 4 to the outside into a guiding opening 37 corresponding
to its diameter. The guiding opening 37 is located on a strut 38
which is connected to the back side of the supporting plate 2. The
strut 38 which is located on the right-hand side of the apparatus
and protrudes beyond the corresponding lateral edge of the
supporting plate 2, in other words is located above the connection
29 of the blower housing 2, and cranked at its end at an incline in
downward direction to such an extent that the front surface of this
strut end is directed at an incline downwardly. That end of the
pull rope or cable 36 which is located at the front side of the
strut 38 has connected thereto a handle 39, which may, for
instance, be elastically connected thereto. The pull rope 36 is in
view of the return spring acting upon the pulley 21 subjected to a
spring force so that when in its starting position, the rear end
face of its shank engages the front surface of the crank end of
strut 38 whereby it occupies a predetermined position with regard
to the supporting plate 2. This position is so selected that the
handle 39 is directed outwardly and inclined downwardly toward the
front. When the apparatus according to the invention is placed on
the back of a person, the handle 39 will be located underneath the
right armpit of the respective person so that it can easily be
grasped. For purposes of starting the engine 5, the handle 39 is
grasped by the person with the right hand and by stretching out the
right arm at an incline toward the outside and pulling toward the
front so that the pull rope which extends from the cover 23 through
the opening 37 toward the handle 39 will be substantially straight
which means that the rope 36 is not bent and consequently no power
losses will occur.
According to FIGS. 5 and 6, a discharge conduit 41 comprising a
flexible hose 40 is connected to the connection 29 of the blower
housing 25 in any convenient manner, for instance, by slipping it
over and fastening it thereto by a clamping shell extending around
the circumference of said conduit.
As will be evident from the above, the apparatus designed in the
manner described above in detail, is characterized by a favorable
weight distribution and is furthermore characterized by a protected
and easily accessible arrangement of the sensitive engine and
blower elements.
It is, of course, to be understood that the present invention is,
by no means, limited to the particular showing in the drawings, but
also comprises any modifications within the scope of the appended
claims.
* * * * *