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Патент USA US2407769

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_ Sept. 17, 1946.
A. 'r. PETERSON
PUSH MOWER
I
7 Filed May 15, '1942 ‘
45
‘
2 Sheets-Sheet l
Sept. 17,
A_ T_ PETERSON
I 2,407,767
‘PUSH MOWER
I Filed May 15, 1942
2 Sheets-Sheet 2
Patented Sept. 17, 1946
2,407,767
UNITED STATES PATENT OFFICE
2,407,767
PUSH MOWER
Alfred T. Peterson, Minneapolis, Minn.
Application May 15, 1942, Serial No. 443,035
3 Claims.
(01. 56--—260)
1
My invention relates to an improvement in
mowers, wherein it is desired to provide a mow
ing apparatus capable of‘ cutting close to an ob
struction.
It is the object of the present invention to pro
vide a mowing apparatus which includes a pair
of relatively reciproc'able cutter elements which
are mounted forwardly from the supporting ap
paratus so that grass‘ or grain may be mowed
extremely close to an‘ obstruction. By providing 10
the cutter elements on the forward end of the
mower and by providing a suitable means by
which the mower may be pushed, it is obvious
2
blades may pivot somewhat on a substantially
horizontal axis with respect to the other pair of
blades, so that the mower will follow closely the
contour of the surface of the ground.
A further feature of the present invention lies
in the provision of a means for swinging the cut
ter blades out of cutting position. The Gutter
blades are pivotally secured to the, supporting
frame‘ and the blade operating means is connected
through a universal joint. As a result,- the entire
blade may be swung from a substantially hori
zontal. cutting-position to a generally vertical in-'
operative position when the cutting operation of
the blades is not desired.
that the cutter blades may be moved forwardly
A further feature of the present invention lies
into close proximity with a. wall or other obstruc 15
in the fact that the blades may be tilted upwardly
tion. This construction saves considerable work
at an". angle to the horizontal when it is desired
in trimming grass‘ or the like about such obstruc
to cut grass or‘ grain at a point somewhat spaced
tions.
from the surface of the ground. B'y inclining
It is an object of the present invention to pro
vide reciprocable cutter blade means supported 20 the blades upwardly their cutting edges are raised
somewhat‘ from the surface of the ground per
by suitable wheels or rollers mounted on a frame
extending rearwardly from the cutter blades.
The wheels supporting the frame engage the
ground so that as the mower moves over the
ground the cutter blades are reciprocated. through
a suitable connecting mechanism.
A feature of the present invention resides in the
mitting the cutting operation at a point substan
tially above the ground surface.
These and other objects and novel features of
my invention will be more clearly and fully set‘
forth in the following speci?cation and claims.
In the drawings forming a part of my sp'ec_
iiication‘:
fact that the cutter blades extend laterally beyond
Figure 1 is a perspective view of a moving ma
the support shoes so‘ that the mower may be
operated directly adjacent a wall. or other obstruc 30 chine showing the arrangement of the parts
thereof.
tion. As the blade projects laterally beyond the
Figure 2 is a side elevational view of the mow
sides of the supporting shoes, these blades may
ing‘ device illustrated in Figure 1, showing in
extend directly adjacent the wall or other
dotted outline the cutter blades in elevated posi
projection, allowing the mowing operation to con‘
tinue more closely adjacent the projection than 35 tion.
Figure 3 is a top plan view of the clutch device
has previously been possible.
which may be used for disconnecting thev blade
A feature of the present invention. lies in the.
reciprocating mechanism from the drive wheels.
transmission of the power from the supporting
Figure 4 is a‘ sectional view transversely through
wheels of the device to" the reciprocating blades
through a clutch mechanism which‘permits dis 40 the clutch mechanism shown in Figure 3.
Figure 5 is a vertical section through the cen
engagement of the driving power from the blades
ter shoe containing theblade reciprocating, mech‘-'
when it is so desired. Thus the mower may be
anism.
pushed over the surface of the ground without
Figure 6 is a’ perspective view of :a modi?ed
reciprocating the blades when it is so desired.
A feature of the present invention resides in 45 form of construction of my mower.
Figure 7 is a sectional view on‘ a vertical plane
the provision of a simple and light weight mower
through one of the blade supporting. shoes.
which includes reciprocable blades which may,
Figure 8 is a vertical section on a‘ transverse
if desired, be provided in two relatively pivotal
plane through the center shoe of the mowing
pairs. One pair of blades‘ may reciprocate on
one side of the center of the machine, while a 50 device shown in Figure 6, showing the blade re
ciprocating mechanism.
second pair of blades may reciprocate on the
Figure 9 is a perspective view of one of the
opposite side of the machine. These sets of blades
blade ends.
extend into engagement so that no strip of grass
Figure 10 is a perspective view of the corre
or grain is left uncut between the two pairs of
blades. At the same time, however, one set of 55 sponding end of the cooperating blade.
3
The mowing machine A comprises a frame II),
which in the form illustrated includes a pair of
side members H and I2, a pair of opposed trans
versely extending rear elements [3 and I4, a pair
of forwardly extending members I5 and [6 con
‘ nected at the inner ends of the members l3 and
I4 and extending parallel to the side members
l l and i2, and a transversely extending connect- '
ing strip i7 connecting the forward ends of the
members l5 and I6. In general shape this frame
It thus comprises a U-shaped element having
a substantially U-shaped offset portion in the
base thereof.
A handle element :9, by means of which the de
4
crank shaft 41 extends through the rear end of a
center sli'oe 49 and is provided with a crank 59
which rotates within the hollow shoe. A con
necting rod 5| is mounted at one end upon the
crank 53 and is pivotally attached at 52 to a
bracket 53 mounted upon a reciprocable cutter
blade 54. A stationary blade 55 operates in con
junction with the movable blade 54. The blades
54 and 55 bear spaced teeth such as 55, which act
to cut grass or grain passing between the same.
The blades 54 and 55 extend laterally beyond‘
the side members H and I2 of the frame H) ex
tending through notches 51 in the supporting
shoes 59. The shoes 59 are notched at 69 to admit
vice A may be pushed, may be of any desired 15 aItransversely extending element 6| which is
shape, but is shown as being U_shaped in forma
pivoted at 62 between the opposed ends of the
tion having a transverse base 20, parallel side
bifurcated forward ends 63 of the frame mem
bars 2|, and angularly extending anchoring ends
22 which extend adjacent to the members I5 and”
I 8 of the frame I0 and are bolted thereto.
A
transverse brace 23 extends between the anchor
ing- ends 22 of the handle [9. This brace 23 is
preferably substantially in alignment with the
rear portions I3 and M of the frame l0 and is
bolted to the frame by means of bolts 24, or other
suitable means.
1 A shaft 25 extends transversely through the
frame I B, being journaled in the side members I l
and I2, and in the frame members l5 and i6.
bers II and I2. Pivots 64 extend through the
shoes 59 and through the transverse element 6|
in a manner to provide a universal joint connect
ing the shoes to the forward ends of the frame
elements II and I2.
A shaft 65 extends through the frame l0 parallel
to the shaft 25. An operating lever 66 is provided
with a forked end 6‘! which straddles the side
element 12 of the frame. An arcuated segment
69 is provided on the frame side l2 and notches
‘E9 in the segment 69 may be engaged by a dog ll
mounted on the end of a rod 72. The rod 12 is
Wheels or rollers 26 are mounted upon the shaft 30.? journaled in an ear ‘(3 on the lever 66 and is oper
25 and either or both of these Wheels may be ?xed
ated by a hand lever 14 pivoted to the lever 66 at
tothe shaft 25 to cause rotation of the shaft as
the point 15. By pivoting the hand lever 14
the mower A is moved along the ground.
The
wheels 25 are designed to engage the surface of
the ground and to be rotated by contact there
with.
.
'
Also mounted ‘upon the shaft 25 between the
frame portions l5 and I5, I provide a collar 2i’
which is keyed or otherwise affixed to the shaft
toward the handle the spring 16 may be com~
pressed to withdraw the dog ‘ll forming a selected
-_ notch 10 in the segment 69.
A link ll‘ pivotally connects the lever 55 to one
of the shoes 59. An. arm 19 is mounted on the
opposite end of the shaft 65, this arm 19 having
a forked end 89 which straddles the side mem
ber H of the frame If]. A link 8! pivotally con
the collar 2?, which teeth cooperate with suitable
nects the arm 19 with the other of the shoes 59.
teeth 39 on a collar 3!. The collar 3! forms a
In operation, the handle lever 74 is operated to
hub for the disc or plate 32 which supports the
retract the dog ‘H and the lever 66 may be pivoted,
gear teeth 33. The disc or plate 32 is supported
thus acting to pivot the shaft 65. The lever 66
within‘ the cylindrical shell 34 of a clutch housing 45 and the arm 19 are thus pivoted in unison with
which is connected by the disc 35 to the hub 36.
the links ‘H and 8|, acting to pivot the shoes 59
A springv3l is interposed between the hub 33 and
upwardly, as indicated in dotted outline in Figure
25. vA series of clutch teeth 29 are provided on
the plate or disc 32 so as to urge the disc and
2 of the drawings. By elevating the cutter blades
collar 3| .into engagement with the collar 21. In
54 and 55 to a slight extent, the grass or grain may
other words, the teeth 29 and 33 on the collars 21 "50 be cut off at a considerable distance .from the
and 3| respectively are normally held in engage
surface of the ground.
ment by the spring 31. A groove 33 in the collar
In Figures 6 through 8 of the drawings, I dis
. 3| embraces the shift rollers 45 mounted upon the
yoke 4!, by means of ‘which the position of the
collar 3| may be changed. A handle 42 is provided
on the yoke 4| to permit the pivoting of the yoke
4| about its vertical pivot 43. Obviously when
the handle 42 is operated to pivot the yoke 4 I,’ the
close a modi?ed form of construction of mower
which is indicated in general by the letter B.
The mower B includes a transversely extending
shaft 82 having a pair of wheels or rollers 83
mounted thereupon. Either one or both of the
wheels or rollers 83 are mounted to rotate with
the shaft 82, so as to provide a drive mechanism
disengaged.
60 for the cutter blades. A loop-shaped frame 84 is
~ A pinion or beveled gear 44 is mounted on a
supported upon the shaft 82 and a collar 85 is
shaft 45 which extends forwardly or substantially
mounted on the shaft 82 within the frame 84.
parallel to the side members H and I2 of the
The collar 85 is mounted to rotate with the shaft
frame. This pinion 44 normally engages the gear
82 ‘and is provided with teeth 86 which are de
teeth 33, but this gear is disengaged from the
signed to engage with cooperable teeth 81 on the
teeth 33 by operation of the yoke handle 42. Thus
collar 89. The collar 89 forms the hub, and a
the driving action of one or both of the wheels
disc 99 which is similar to the disc 32' illustrated
26, which istransmitted through the shaft 25 to
in Figure 4. Gear teeth 9| are provided on the
teeth 29 and 39 on their respective collars may be
the collar 21, may, or may not, rotate the shaft
45, depending upon the position of the collar 3!
and the shifting yoke 42 which operates the
clutch.
disc 99, which teeth are engageable with the teeth
of a pinion 92. The pinion 92 is mounted upon a
shaft 93 which projects forwardly from the frame
84, as will be later described.
' The shaft 45 extends through the transverse
A groove 94 in the collar 89 embraces pins or
element I‘! of the frame and is connected through
rollers supported by a yoke 95 which is pivotally
a universal. joint46 to a crank shaft 41. The 75 mounted upon acooperating member 95 of the
2,407,767
5
frame 34. A handle Q'I on the yoke 93 permits
the pivoting of the yoke so as to slide the collar
83 and disc
to disengage the teeth 33 and 3?
and also to disengage the gear teeth M from the
pinion 92, The disc 03 preferably acts as a
closure for the cylindrical shell 99 of the clutch
housing @393 which is supported at its opposite end
from the surface of the ground or to place the
cutter bar in an inoperative position.
It will be noted that the blades I04, I05, I06,
and I0‘! project laterally beyond the shoes I03 so
that the ends of the blade may extend closely
adjacent a wall or other obstruction. Thus, it
will be seen that the mower will out directly
adjacent an obstruction which is important in
a
device of this type. It will be noted that the
the housing 34 is supported upon the shaft 25.
B is provided with blades which conform
A spring identical to the spring 3'! shown in 10 mower
to the contour of the ground and therefore the
Figure 4 normally urges the teeth
and 3? into
upon the shaft 82 similar to the manner in which
engagement.
blades can be of a substantial length.
universally mounted within the bifurcated ends
I02 and are designed to slide along the surface
of the ground. These shoes I03 act to support
the cutter blades I04, I05, I06, and H17, as will
20
be noted in the drawings.
endeavored to set forth the best embodiments
thereof, I desire to have it understood that ob
vious changes may be made within the scope
of the following claims without departing from
the spirit of my invention.
I claim:
In accordance with the patent statutes, I have
Extending forwardly from the shaft 32' I pro
described the principles of construction and op
vide a pair of ears IOI which are equipped with
eration of my mowing device and while I have
bifurcated ends I 02. A pair of shoes I03 are 15
A central shoe I03 is provided with a hollow
interior H0 which contains a crank shaft III
provided with a crank H2. The crank shaft II I
is connected to the forwardly extending shaft 93
1. A mower comprising a frame, a pair of arms
extending forwardly from said frame, a pair of
forwardly extending shoes pivotally mounted to
through the universal joint H3. Connecting 25 said frame by universal pivots, an intermediate
shoe positioned between said ?rst named shoes,
rods H4 and H5 are mounted upon the crank
?xed cutter blades pivoted to said intermediate
H2 and the ends of these connecting rods are
shoe along a longitudinal axis and connected to
pivotally attached at H6 and III to the movable
said ?rst named shoes, relatively reciprocable
blades I04 and £06. The blades I04 and I00
are reciprocable with respect to the blades I05 30 cutter blades mounted adjacent said ?xed cutter
blades, means on said intermediate shoe for
and I01. The adjacent ends of the blades I05
actuating said reciprocable cutter blades, a shaft
and I01 are hingedly connected at H3 to the
extending from said actuating means, and a uni
lower surface of the body I00. The blades I 03
versal
pivot in said shaft in substantial align
and I01 are connected to the shoes I33 in any
ment with said ?rst named universal pivots, said
suitable manner, such as is disclosed in Figure 35 shoes being simultaneously pivotal about a
'7 of the drawings. In this ?gure, I disclose an
transverse horizontal axis when said universal
upstanding ?ange I20 extending along the rear
pivots are aligned.
edge of the blade I05 and a ?ange I2I on this
2. A mower comprising a frame, a pair of shoes
upstanding ?ange I20 which is parallel and in
pivotally
connected to said frame by universal
40
spaced relation to the blade I05. Aligned open
pivots, an intermediate shoe between the shoes
ings I22 are provided in the blade I05 and in
of said pair, ?xed cutter blades pivotally secured
the ?ange I2I. A bolt I23 extends through the
along a longitudinal axis to said intermediate
aligned openings I22 and into the shoe I03 to
shoe and secured to the shoes of said pair, re
hold the blade I05 in place.
ciprocable cutter blades mounted adjacent said
A slot I24 in the blade I04 permits the inser
?xed cutter blades, means on said intermediate
tion of the bolt I23 therethrough. permitting a
longitudinal sliding of the blade I04 while hold
ing the blades in proper relationship. Obviously
shoe for actuating said reciprocable cutter blades,
drive shaft means for said actuating means,
means driving said shaft, and a universal pivot
the blade I0’! is formed similarly to the blade
in said shaft in substantial alignment with the
I05 and‘ the blade I00 is attached thereto in any 50 universal ?rst named attachment of said shoes,
convenient manner.
said shoes being simultaneously pivotal about a
A handle I25 is secured by ?xed pivots I20 to
transverse horizontal axis when said universal
the frame 84. This handle may be of any suit
pivots are aligned.
able type. Caster rollers I2'I are mounted be
3. A mower comprising a frame, a pair of arms
neath the frame 84 to support the frame and to
extending forwardly from said frame, a pair of
allow the same to ?ex with respect to the ground.
forwardly extending shoes pivotally mounted to
An arcuated segment I29 is provided upon
said frame by universal pivots, an intermediate
the frame 84 extending in a vertical longitudi
shoe positioned between said ?rst named shoes,
nally extending plane. A lever I30 is provided
?xed cutter blades pivoted to said intermediate
60
with a bifurcated end I3! which is pivoted at
shoe along a longitudinal axis and connected to
I32 to this segment I29. A dog I33 is mounted
said ?rst named shoes, relatively reciprocable
upon a slidable rod I34 which is reciprocated by
cutter blade mounted adjacent said ?xed cutter
a hand lever I35 pivoted to the lever I30. A
blades, means on said intermediate shoe for
spring, similar to the spring ‘I5 illustrated in
actuating said reciprocable cutter blades, a shaft
Figure 1 of the drawings, urges the dog I33 into
extending from said actuating means, a universal
engagement with notches in the segment I29.
A link I36 is loosely pivotally connected at
pivot in said shaft in substantial alignment with
said ?rst named universal pivots, and lever means
connected to said shoes for pivoting the same in
one end to the shoe I09 and at its opposite end
to the lever I30. Branch links I31 connect the 70 unison, said shoes being simultaneously pivotal.
about a transverse horizontal axis when said
link I36 to the shoes I03. Thus by operating
universal pivots are aligned.
the lever I30 the shoes I03. may be tilted up
ALFRED T. PETERSON.
wardly either to space the cutter blades away
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