Sulky with removable foot plate
US006497422B1
(12)
United States Patent
(10) Patent N0.:
US 6,497,422 B1
(45) Date 0f Patent:
Dec. 24, 2002
Bellis, Jr.
(54)
SULKY WITH REMOVABLE FOOT PLATE
(76)
Inventor:
William B. Bellis, Jr., 1401 Shuff La.,
Louisville, KY (Us) 40205
(*)
Notice:
Subject to any disclaimer, the term of this
.
.
3,669,469 A
3,731,946 A
6/1972 Haftelius
5/1973 Westcott
3,759,541 A
9/1973 Peterson
3’834’726 A
9/1974 HObZa
3 946 822 A
U-S-C- 154(k)) by 0 days(21) Appl. N0.: 09/663,236
(22) Filed:
8/1970 Kratzke
5/1972 Tatianko et al.
3,912,300 A
patent is extended or ad]usted under 35
_
3,524,514 A
3,664,431 A
Sep. 15, 2000
3/1977 Johnson
4,045,050 A
8/1977 Hawk
4,079,955 A
3/1978 Thorpe et al.
4,232,754 A
11/1980 Corrigan et al.
(List continued on neXt page.)
OTHER PUBLICATIONS
COntinuatiomin-Partof application N°~ 09/474,383, ?led 0“
Printout from Internet Web Site WWW.trimmertrap.com—
Dec. 29, 1999, now Pat. No. 6,145,855.
-
(60) Provisional application No. 60/141,186, ?led on Jun. 25,
1999, provisional application No. 60/211,649, ?led on Jun.
15, 2000, and provisional application No. 60/218,884, ?led
on Jul. 18, 2000.
(51) Int. c1.7 .............................................. .. B62D 63/00
(52)
US. Cl. ....................... .. 280/32.7; 280/63; 280/492
_
(58)
Bryan, Ji.
3/1976 Dohse et a1
4,010,507 A
Related US. Application Data
(63)
10/1975
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~
2
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*
STh°;V;.r§aS°Inab1SSfaCSéH51egfnéel’gcam S lflviilmon'l T f
llr
1 er’ nc'
tan
p_ u y
perator S
anua
ur
Rider Minnetonka, MN Prior to Dec- 1999
Wright Manufacturing, Inc. “Literature Bag” Wright Manu
iacmlrinfz {nC;,J19911_1‘i]9: (iiitg‘gsbuie MDt~ J
‘mg. 6 . “n 5’
‘mg 6 .
66 S
V“ mm“
1 J, ,
‘mg 6 “n S’
Louisville, KY US Prior to Dec. 1999.
Field of Search .............................. .. 280/32.7, 492,
280/493, 494, 63, 64—77, 2; 180/16, 14.1;
Velke, Velke Sulky Advertisement
Wright
Manufacturing,
Gaithersbur MD Us 1996
56/149, 15.5, 15.7, 15.9
_
(56)
g’
'
Primary Examiner—Brian L. Johnson
References Clted
Assistant Examiner—Bryan Fischmann
Us PATENT DOCUMENTS
(74) Attorney, Agent, ‘or Firm—Theresa Fritz Camoriano;
Camonano and Associates
5,514 A
*
4/1848 Woodcock ................. .. 280/63
363,221
A
*
5/1887
Fellows
384 820
A
*
6 1888
B
429:784 A
4
41890 T331; _ _ _ _ _ _ _
tt
.....
. . . ..
280/63
......
. . . ..
280 63
4487015 A * 3/1891 prick et a1_
504,043 A *
_ _ _ __ 28O;63
(57)
ABSTRACT
A preferred embodiment of a sulky includes a removable,
280/63
ad]ustable foot platform, replaceable axles, and a hitch
8/1893 Luke ......................... .. 280/63
including stops that limit the extent of pitch, roll, and yaW
1,334,559 A
3/1920 Schaumburg
motions betWeen the sulky and the toWing vehicle. The foot
1,590,582 A *
2,474,964 A :
6/1926 J0hI_1S0I1 et a1- ------------- -- 280/63
7/1949 White ....................... .. 280/63
platform preferably projects doWnWardly from the frame on
Which the axles are mounted The foot platform is mounted
FDIC; """""""""""" " 280/63
on a frame, and the frame preferably is structurally stronger
2
:
a
of
CS
3,379,452 A
4/1968 Torrisi
3,434,739 A
3/1969 Schoonover
3,498,639 A
3/1970 Hawk
than the foot platform‘
17 Claims, 6 Drawing Sheets
US 6,497,422 B1
Page 2
US. PATENT DOCUMENTS
_
4,263,977 A
4,326,367 A
4353572 A
4/1981 W?le?
*
4,444,409 A
4,588,199 A
4/1982 Cashman ................ .. 280/63 X
10/1982 McCain
4/1984 Garrison
5/1986 Fisher
5,540,308 A
5,564,721 A
*
5,575,140 A
5,697,623 A
5,697,980 A
7/1996 Wians ..................... .. 180/141
10/1996 Wians
11/1996 Bermes et 81.
12/1997 Bermes et a1_
* 12/1997 0161116161. ................. .. 623/16
5,810,371 A
5,813,679 A
9/1998 Velke
9/1998 Hobrath
4,610,457 A *
9/1986 Harmon
5,842,707 A
12/1998 Smith
4,664,403 A
5/1987 Livingston
5,882,020 A
3/1999 Velke
3/1988 Siemon .................. .. 280/63 X
7/1988 Simmons ................... .. 280/63
5,909,887 A
5947505 A
6/1999 Hobrath
9/1999 Martin
4,732,401 A
4,758,011 A
*
*
4,828,282 A
4,876,846 A
5,004,251 A
5,020,813 A
5,076,599 A
5/1989 Pinto
10/1989 Torras
4/1991 Velke et 81.
*
6/1991
12/1991
5,964,358 A
6,000,705 A
6,062,582 A
10/1999 Hafendorfer et 81.
12/1999 Velke
5/2000 Martin
Go?schalk ---------------- -- 280/204
6,145,855 A
* 11/2000
B61115, Jr. ................ .. 280/32.7
Locke“ er @1-
6,161,852 A
*
Bergling . . . . . . . .
5,118,123 A
6/1992 Betrock
5,388,850 A
5,413,364 A
2/1995 Simone
5/1995 Hafendorfer
6,349,955 B1 *
* cited by examiner
12/2000
. . . ..
280/63
2/2002 Cottard et a1. ............ .. 280/204
U.S. Patent
Dec. 24, 2002
Sheet 1 0f 6
US 6,497,422 B1
U.S. Patent
Dec. 24, 2002
Sheet 2 0f 6
US 6,497,422 B1
U.S. Patent
Dec. 24, 2002
Sheet 3 0f 6
US 6,497,422 B1
U.S. Patent
Dec. 24, 2002
Sheet 4 0f 6
US 6,497,422 B1
U.S. Patent
Dec. 24 2002
Sheet 6 of6
US 6,497,422 B1
1
2
SULKY WITH REMOVABLE FOOT PLATE
FIG. 2 is a front perspective vieW of the sulky of FIG. 1;
FIG. 3 is an exploded front perspective vieW of the sulky
of FIG. 2;
FIG. 4 is a front vieW of the sulky of FIG. 1;
FIG. 5 is a side vieW of the sulky of FIG. 2;
FIG. 6 is a top vieW of the sulky of FIG. 2;
FIG. 7 is a perspective, broken aWay vieW of the sulky of
This application is a continuation-in-part of, and incor
porates by reference US. patent application Ser. No. 09/474,
383, ?led Dec. 29, 1999, now US. Pat. No. 6,145,855. It
also claims priority from and incorporates by reference
Provisional Application Ser. No. 60/141,186, ?led Jun. 25,
1999, Provisional Application Ser. No. 60/211,649, ?led
Jun. 15, 2000, and Provisional Application Ser. No. 60/218,
884, ?led Jul. 18, 2000, relating to a sulky.
FIG. 1 secured to a toW vehicle via a hitch;
10
BACKGROUND OF THE INVENTION
One of the problems With knoWn sulkies is that they Wear
out With use. They generally sit very loW to the ground, and
a left-to-right horiZontal axis to provide pitch motion;
they hit curbs, rocks, stumps, and uneven ground, Which
tends to deform the entire sulky and to erode the edges of the
sulky. Even contact With grass erodes the edges of the sulky
over time. Many of these problems could be alleviated by
raising the ?oor of the sulky, but then it Would not function
properly. The ?oor must be loW, because the operator must
have a loW center of gravity for stability and in order to
comfortably reach the controls of the vehicle that is pulling
the sulky. The Wear and tear of a sulky during normal use
also may bend the shafts Which support the sulky’s Wheels.
The mechanism for securing the sulky to the toW vehicle
is also of importance for the sulky and its rider. Greater
degrees of freedom of movement alloW the sulky to better
15
FIG. 10 is a vieW of the moWer and hitch of FIG. 1 With
FIG. 11 is a vieW of one of the mounting brackets of FIG.
20
The sulky of FIGS. 1—11 has a frame 10 made of upper
25
35
1. Pitch motion means pivoting about a horiZontal left
to-right axis.
40
SUMMARY OF THE INVENTION
The present invention provides a sulky Which has many of
45
the advantages of Applicant’s prior design, and it solves the
problem of sulkies Which erode and distort With Wear.
The sulky of the present invention includes a sturdy, rigid
frame, Which is at a relatively high elevation above the
ground, and a foot platform Which removably connects to
50
the frame by bolts or other knoWn removable connectors and
projects doWn from the rigid frame to a loWer elevation.
With this design, if the sulky hits a curb, a rock, or a high
spot in the ground, damage is con?ned to the foot plate,
Which can easily be removed and replaced. A preferred
embodiment of the sulky also includes removable, replace
55
60
outWardly-projecting bolts 23 Welded to the ?ange 21. Each
stub axle 20 is mounted onto the frame 10 by inserting the
axle from the inside of the frame member 14, through an
opening in the frame member 14, and through the axle
support 18. The bolts 23 are extended through holes in the
frame member 14, and nuts on the outside of the frame
member 14 are tightened onto the bolts 23 until the ?ange 21
of the stub axle abuts the inner surface of the frame member
14, holding the stub axle in a ?xed position on the frame
member 14. The Wheels are then mounted on those axles 20.
This puts the bottom of the loWer beam 14 about four inches
off of the ground and the center of the axle 20 about 5 inches
to 5.5 inches off the ground.
The upper and loWer beams 12, 14 extend in a substan
tially horiZontal direction, With the loWer beams 14 extend
ing at a ?rst height and the upper beams extending at a
tally from the loWer beams 14 at the ?rst height.
Upper and loWer hitch plates 22 are ?xed to the upper
off of the ground. The upper hitch plate 22 has a hole 25 that
is aligned With a hole 25 in the loWer hitch plate 22 to
receive a vertical pin, Which Will be described later.
The foot platform 24 is a ?at sheet of metal Which has
been formed so that the front and sides of the sheet are bent
upWardly to connect to the loWer frame member 14. As
shoWn in FIG. 3, the foot platform 24 has a plurality of sets
of holes 27, Which are used to bolt the foot platform 24 to
BRIEF DESCRIPTION OF THE DRAWINGS
Wheels being shoWn in phantom;
a holloW structural beam, is Welded betWeen the upper and
loWer beams 12, 14 to maintain them a ?xed distance apart.
Axle supports 18 are mounted on the loWer beams 14 and
project outWardly, and stub axles 20 are mounted in those
axle supports 18 and into the beam 14. The axle supports 18
are Welded to the outside of the beam 14. As shoWn best in
FIG. 3, the stub axles 20 include an inner ?ange 21 With
beam 12, preferably by Welding, putting them 12—14 inches
during use, it can readily be replaced.
FIG. 1 is a side vieW of a sulky made in accordance With
the present invention connected to a moWer—the sulky’s
ment the beams are made of square tubing, but they could
also be made of channels, other formed beams, or other
strong, structural members) that have been bent into a
second height. The axles 20 project substantially horiZon
able axles, so that, if an axle is bent or otherWise damaged
The sulky of the present invention may be toWed via a
hitch mechanism Which alloWs limited pitch, roll, and yaW
motion of the sulky for the comfort and security of the
operator as Well as for the durability of the sulky.
and loWer holloW structural beams 12, 14 (in this embodi
substantially U-shape. Avertical connector 16, also made of
30
there are linkages betWeen the sulky and the mounting plate
2. Roll motion means pivoting about a horiZontal front
to-back axis.
3. YaW motion means pivoting about a vertical axis.
1, looking toWard the moWer.
DESCRIPTION OF THE PREFERRED
EMBODIMENTS
crashing against it and deforming the sulky. The ability to
Which permit the platform to shift relative to the vehicle. The
folloWing standard de?nitions Will aid in the description of
the types of relative motion betWeen the platform and the
vehicle:
FIG. 9 is a perspective, broken aWay vieW along line 9—9
of FIG. 7;
the sulky removed; and
folloW the terrain and to ride over an obstruction instead of
ride over an obstruction, coupled With limits on hoW far the
sulky Will move When riding over such an obstruction,
provide a more comfortable ride for the operator. Sulkies
typically have a mounting plate or some other type of
mounting bracket that mounts to the back of the vehicle, and
FIG. 8 is a perspective, broken aWay, detail vieW taken
along the line 8—8 and shoWing one of the brackets that
mounts the sulky to the toW vehicle to permit rotation about
65
the loWer frame member 14. In this preferred embodiment,
there is an upper set of holes 27 and a loWer set of holes 27.
TWo bolts 29 are inserted through the holes 27 and through
US 6,497,422 B1
3
4
the lower frame member 14 in the front, tWo on the left side,
and tWo on the right side, and nuts are tightened onto the
bolts 29 to hold the foot platform 24 in place. If the upper
set of holes is used, the foot platform Will be loWer to the
mounting bracket 34. The connecting arm 36, shoWn in FIG.
coupler shaft 38. The vehicle mounting ends 54 of the
ground, and, if the loWer set of holes is used, the foot
connecting arm 36 de?ne holes Which are aligned With the
platform Will be mounted at a higher elevation relative to the
respective holes in the bracket legs 46A, 46B, and the bolts
50 eXtend through the respective holes in the bracket legs
46a, 46B and through the respective holes in the mounting
7, is a substantially U-shaped yoke, including tWo vehicle
mounting ends 54 and a central portion 55 that mounts to the
ground.
The foot platform 24 is surrounded by the U-shaped frame
portion 14 and eXtends doWnWardly from the U-shaped
frame portion 14 to an elevation that is both loWer than the
bottom of the frame portion 14 and loWer than the aXles 20.
While it is preferable to bolt the foot platform 24 onto the
10
permits the connecting arm 36 to pivot up and doWn (pitch
motion) relative to the vehicle 40 about a left-to-right
horiZontal aXis 52. The upper Web 47 of the bracket projec
frame as shoWn here, the foot platform 24 may alternatively
be tack Welded to the frame or fastened to the frame by other
knoWn means. The foot platform 24 preferably projects
doWnWardly approximately 1.5 to 2 inches from the frame,
15
ground, the foot platform is 2—2.5“ off the ground.
Since the foot platform is made of a sheet material, While
the frame is made up of much stronger structural beams, if
the foot platform hits a curb or other obstruction, it may
erode or deform, but it Will not cause the frame to deform or
removed and replaced Without having to replace the entire
25
sulky.
during use of the sulky, they can readily be removed simply
by removing the associated Wheel, removing the nuts
mounted on the bolts 23, and sliding the stub aXle 20 out of
the frame 14. A neW stub aXle 20 may then be installed
section in the forWard portion 58 (See FIG. 9), Which mounts
quickly and economically.
right outWardly-projecting arms 30, Which prevent the sulky
to the connecting arm 36, and it has a square cross-section
in the rear portion 60, Which mounts betWeen the plates 22
35 that are ?Xed to the frame 12. There is a forWard-to-rear
directed tube 63 ?Xed on the central portion 55 of the
connecting arm 36, Which receives the round cross-section
from pivoting too far to the left or right relative to the moWer
or other toWing vehicle. When the sulky is pivoting about the
vertical aXis of the pivot pin 32 relative to the toWing
forWard portion 58 of the coupler shaft 38. Avertical hole 61
in the round cross-section portion 58 of the coupler 38
receives a linch-pin 64B, Which retains the coupler shaft 38
vehicle, one of the arms 30 Will abut the hitch mechanism
and serve as a stop to prevent the sulky from pivoting too far
about that vertical aXis, thus limiting the yaW motion of the
sulky.
Referring noW to FIGS. 7—11, a linkage arrangement 33
includes mounting brackets 34, a U-shaped mounting yoke
doWnWard pitch of the sulky relative to the moWer.
It should be noted that a spring 62 is mounted on each of
the bolts 50. The spring 62 Wraps around its respective bolt
50 and has tWo free ends. The ?rst free end 64 Wraps under
the arm 36, and the second free end 66 eXtends into a slot 68
on the bracket 34. The springs 62 bias the yoke 36 upWardly
so that, When the sulky is removed from the yoke 36, the
springs 62 cause the yoke 36 to pivot upWardly relative to
the moWer, as shoWn in FIG. 10, leaving the yoke mounted
to the moWer but in a position in Which it does not interfere
With using the moWer.
The front of the frame 12 is mounted to the connecting
arm 36 through the coupler shaft or connecting shaft 38, as
shoWn in FIG. 7. The coupler shaft 38 has a round cross
Similarly, if the aXles 20 are bent or otherWise damaged
Looking at the front portion of the sulky, it can be seen
that the upper and loWer hitch plates 22 each have left and
tion 46 serves as a stop, limiting the amount of pitch. Once
the connecting arm 36 rotates upWardly relative to the
brackets 34 a certain distance, it Will contact the upper Wall
47, thereby limiting the pitch. The loWer Wall 47 also limits
so that, When the bottom of the frame is 4 inches off the
otherWise cause damage to the frame. The foot platform 24
thus becomes an eXpendable item, Which can readily be
ends 54 of the connecting arm 36 to pivotably mount the
connecting arm 36 on the mounting brackets 34. This
45
or arm 36, a connecting shaft 38, and the upper and loWer
on the connecting arm 36. A forWard projection 65 of the
tube 63 has tWo recesses 67 cut into its forWard edge. The
linch pin 64B lies in those recesses 67. As the connecting
shaft 38 rotates about the front-to-back horiZontal aXis, in
the roll direction, the linch-pin 64B Will contact the sides of
these recesses 67, thereby limiting the roll of the sulky 10
plates 22 ?xed to the frame 12 of the sulky 10. The L-shaped
moWer mounting brackets 34, shoWn best in FIGS. 8 and 11,
relative to the moWer 40. The hole 32A in the rear portion
are secured to the rear of the self-propelled vehicle by bolts
through the mounting plates 22.
Thus, the mounting arrangement provides for pitch, roll,
of the coupler shaft 38 receives the pin 32, Which extends
60, although they could also be connected by Welding or
other knoWn means. Each mounting bracket 34 includes a
and yaW motion of the sulky relative to the toWing vehicle,
While also providing limits for all three types of motion.
pair of upper holes, a pair of central holes, and a pair of
loWer holes, through Which the bolts 60 can pass to provide
height adjustment. In this vieW, the bolts 60 pass through the
central set of holes. Each mounting bracket 34 includes one
leg 45 that lies ?at against the rear surface of the vehicle 40
55
and another leg 46, having left and right side Walls 46A, 46B
a frame comprising at least one formed, structural mem
ber extending in a substantially horiZontal direction at
a ?rst height;
a foot platform removably mounted on said frame and
projecting doWnWardly from said frame at least one
reversed and used on the other side, and this adds a bottom
closure to the U-shaped cross-section, giving the leg 46 a
holes of the left and right brackets 34 are aligned and receive
bolts 50, that are used to mount the connecting arm 36 to the
Without departing from the scope of the present invention.
What is claimed is:
1. A sulky, comprising:
and at least a top Web 47 connecting the left and right side
Walls 46A, 46B, to form an inverted U-shaped cross-section.
In this embodiment, there is also a bottom Web 47 connect
ing the left and right side Walls so that the bracket can be
rectangular cross-section. The leg 46 projects rearWardly
and de?nes left-to-right horiZontal holes (not visible). The
It Will be obvious to those skilled in the art that modi?
cations may be made to the embodiments described above
inch;
65
?rst and second horiZontal aXles mounted on and project
ing from said frame at said ?rst height;
Wheels mounted on said aXles; and
US 6,497,422 B1
6
5
11. A sulky, comprising:
a hitch mounted to said frame for hitching said frame to
a towing vehicle, said hitch including at least one
and at least one vertical shaft to provide for yaW motion
a frame;
a hitch arrangement mounted to said frame;
a foot platform releasably mounted on and projecting
betWeen said sulky and the toWing vehicle.
2. Asulky as recited in claim 1, Wherein said foot platform
left and right axles bolted to said frame and projecting
left-to-right horizontal shaft to provide for pitch motion
doWnWardly from said frame;
has less structural strength than said frame, so that said foot
outWardly from said frame; and
platform may be deformed Without deforming said frame.
3. Asulky as recited in claim 1, Wherein said foot platform
Wheels mounted on said axles;
Wherein said hitch arrangement includes at least one
left-to-right horiZontal shaft, at least one forWard-to
rear horiZontal shaft, and at least one vertical shaft in
is bolted to said frame.
4. A sulky as recited in claim 3, Wherein one of said foot
platform and said frame de?nes upper and loWer sets of
order to provide for pitch, roll, and yaW motions
betWeen the sulky and the toWing vehicle.
holes, permitting the height of the foot platform relative to
the frame to be adjusted.
5. A sulky as recited in claim 1, Wherein said formed
structural member includes a substantially horiZontally
12. A sulky as recited in claim 11, Wherein said hitch
arrangement also includes at least one stop Which limits the
extent of at least one of the pitch, roll, and yaW motions.
13. A sulky as recited in claim 12, Wherein said hitch
arrangement includes stops Which limit the extent of the
extending U-shaped portion de?ning left, right, and front
sides, and said U-shaped portion surrounds said foot plat
form.
6. Asulky as recited in claim 5, Wherein said foot platform
is fastened at least to said left and right sides of said
pitch, roll, and yaW motions.
14. Asulky as recited in claim 11, and further comprising
U-shaped portion.
the hitch arrangement upWardly.
15. A sulky, comprising:
a rigid, substantially U-shaped frame;
7. Asulky as recited in claim 6, Wherein said foot platform
is also fastened to said front side of said U-shaped portion.
a spring mounted on said left-to-right horiZontal shaft to bias
25
8. A sulky as recited in claim 6, Wherein one of said foot
platform and said frame member de?nes upper and loWer
sets of holes, and the other of said foot platform and said
frame member de?nes at least one aligned set of holes; and
a less rigid foot platform bolted onto and projecting
doWnWardly from said frame;
?rst and second axles bolted to said frame;
?rst and second Wheels mounted on said ?rst and second
further comprising a plurality of bolts securing said foot
platform to said left and right sides of said U-shaped portion
axles, respectively;
a hitch mounted on the front portion of said sulky,
through one of said upper and loWer sets of holes and
through said aligned set of holes, Wherein the height of said
foot platform relative to said frame can be adjusted by
including three axes of rotation, a pitch axis, a roll axis,
and a yaW axis; and
35
selecting one of the upper and loWer sets of holes.
9. A sulky, comprising:
a frame comprising at least one formed, structural mem
ber;
17. A sulky, comprising:
a foot platform removably mounted on said frame and
projecting doWnWardly from said frame at least one
a frame comprising at least one substantially horiZontal
U-shaped portion having left, right, and front sides;
inch;
?rst and second horiZontal axles mounted on said frame;
and Wheels mounted on said axles;
Wherein said ?rst and second axles each de?ne a ?ange,
and said ?anges are bolted to said frame.
a foot platform removably secured to the frame, With the
45
extends doWnWardly beloW said axles; and
a frame;
a hitch projecting from the front side of said U-shaped
frame member for hitching said sulky to a toWing
a hitch arrangement mounted to said frame for hitching
said frame to a toWing vehicle, including a spring
vehicle;
biased mounting arm;
a foot platform releasably mounted on and projecting
doWnWardly from said frame;
outWardly from said frame; and
Wheels mounted on said axles.
foot platform surrounded by said U-shaped frame por
tion and extending doWnWardly from said U-shaped
frame portion;
?rst and second axles mounted on said frame; and
Wheels mounted on said axles, Wherein said foot platform
10. A sulky, comprising:
left and right axles bolted to said frame and projecting
stops Which limit the amount of pitch, roll, and yaW of
said hitch.
16. A sulky as recited in claim 15, and further comprising
a spring biasing said hitch upWardly.
55
Wherein said hitch includes at least one left-to-right
horiZontal shaft to permit pitch motion and one vertical
shaft to permit yaW motion betWeen the sulky and the
toWing vehicle.
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