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Патент USA US3089611

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May 14, 1963
Filed April 22, 1960
3 Sheets-fSheet l
May 14, 1963
Filed April 22, 1960
5 Sheets-Sheet 2
May 14, 1963
Filed April 22, 1960
3 Sheets-Sheet 3
United States Patent 0 ice
hand truck approaching pick-up position to remove an
Louis A. Hunziker, 783 Commerce Ave,
Longview, Wash.
Patented May 14, 1963
Filed Apr. 22, 1360, Ser. No. 24,021
6 Claims. (Cl. 214-653)
outboard motor from a boat;
FIGURE 2 is a rear elevation view of the hand
FIGURE 3 is a side elevation view of the hand truck
for outboard motors on small boats.
showing a motor supported thereby;
FIGURE 4 is a fragmentary perspective view showing
the automatic adjusting and clamping mechanism for the
load supporting arms;
mounted on the boat the normal ‘support for the motor
is engaged with the boat transom and is not accessible to
In FIGURE 1 the boat 10 is mounted on a trailer 11.
Mounted on the transom 12 of the boat by means of a
This invention relates to improvements in hand trucks
FIGURE 5 is an enlarged fragmentary side view as in
Outboard motors have become so large and heavy that 10
FIGURE 3, showing mechanism for adjusting the position
they can no longer be lifted and carried by hand. It
of the kick board;
has become necessary to employ some mechanical de
FIGURE 6 is a similar view of the opposite side of
vice for moving them about and for mounting the motor
the truck; and
on the transom of a boat and removing it therefrom.
The problem of thus lifting and moving the outboard 15 FIGURE 7 is a view taken on the line 7—7 of FIG
URE 5..
motor is complicated by the fact that when the motor is
suitable supporting bracket such as the C-clamp 9 is
a lifting or transporting ‘mechanism without ?rst removing
the motor and turning it around. A need exists for a 20 an outboard motor 13. The motor 13 has a relatively
large and broad motor housing 14 beneath which ex
universal handling device which can grasp any size or
downwardly a slender vertical drive shaft housing
style of motor from the rear and place it in position on
or tower housing 15. The upper end of the tower
the transom of a boat without requiring some auxiliary
housing has an enlargement which is ?ared or ?anged
device or mechanism to lift and turn the motor in order
25 outwardly at 16 to connect with the motor frame or
to transfer it to and from the boat.
housing. At the lower end of the tower housing a
The general object of the present invention is, there
cavitation plate 17 extends rearwardly above the propeller
‘fore, to provide an improved hand truck which will ‘grasp
18. The foregoing general features are common to sub
an outboard motor from its rear side and then lower it
all known types of outboard motors, although
directly onto the transom of a boat without the assistance
such motors are of widely varying size and style. The
of any auxiliary mechanism.
structural details of the motors are also different where
Another object is to provide a hand truck of the type
described having an improved lift mechanism for raising
and lowering the motor.
Another object is to provide improved support means
for the motor which is automatically self-adjusting to
all different sizes and styles of outboard motors.
Another object is to provide support means actuated
by the weight ‘of the motor to clamp the motor securely
so that it will not shift position while maneuvering the
Another object is to provide a hand truck of the type
described which is simple and inexpensive to manufacture,
by lifting and handling devices heretofore proposed, other
than rope slings, have been limited to use with certain
sizes and styles of motors and could not be use con
veniently with all motors without special adapters or
other auxiliary parts.
The frame of the truck comprises a pair of parallel up
right channel members 20 secured at their lower ends to
a horizontal transverse base member 21 which is equipped
with an axle for a pair of wheels 22 having pneumatic
tires. The truck is stabilized in upright position by a
pair of forwardly extending base members 23 equipped
at their forward ends with caster wheels 24. These
convenient to use, and rugged and reliable in operation.
The present truck comprises an upright guide frame 45 base members are braced by ‘a pair of inclined struts
25 which converge upwardly from the outer ends of
carrying a vertically movable lift carriage operated by a
the base members to an elevated point of attachment with
?uid pressure jack which may be pumped by hand. The
the two channel frame members 20. The truck is
motor is grasped from the rear and supported on a fork
manipulated on the floor by a pair of rearwardly extend
having a pair of forwardly extending parallel arms which
swing together and clamp against opposite sides of the 50 ing handles 26 also mounted on the upright channels 20.
The open sides of channels 20 face each other to pro
slender tower housing of the motor just under the con
vide a vertical guide track for the rollers 29 of a lift
siderably broader motor frame and housing. The arms
carriage 30. Lift carriage 30‘ is of inverted U shape
have a pivotal mounting so arranged that the weight of
having a top horizontal cross member 31 connected at its
the motor is utilized to apply the clamping pressure.
Thus, the motor or any other T-shaped object is ?rmly 55 ends with a pair of depending vertical side members 32
which carry the rollers 29.
held and cannot slip through the supporting arms while,
The upper end of a vertical piston rod 35 is connected
at the same time, the clamping pressure is released as soon
to the center of cross member 31 between the two side
as the weight of the motor is transferred to another
members 32. The lower end of piston rod 35 is equipped
support. The lift frame is also equipped with a kick
board to stabilize the motor in its normal vertical position 60 with a piston in an hydraulic lift cylinder 34 within a
casing 36 which is mounted at its lower end on the
so that the motor will not tend to shift its position on the
horizontal base member 21 between the channels 20. The
supporting arms.
lower end of the lift cylinder is connected with a pump
The invention will be better understood and addition-a1
cylinder 37 containing a small piston on the lower end
objects and advantages will become apparent from the
following detailed description of the preferred embodi 65 of a piston rod 38. The upper end of piston rod 38 is
pivotally connected at 39 with a pump handle 46 which
ment illustrated on the accompanying drawings. Various
is pivotally mounted at ‘41 on ‘a bracket 42 on the
changes may be made, however, in the construction and
casing 36. The hydraulic system includes suitable con
arrangement of par-ts andcertain features may be used
nections and check valves so that when the handle 40 is
without others, all such modi?cations within the scope
of the appended claims being included in the invention. 70 pumped up and down, hydraulic fluid is pumped into the
lower end of the lift cylinder to raise the piston rod 35
-In the drawings:
and lift carriage 30.
FIGURE 1 is a perspective view showing the present
he lift carriage is lowered by opening a valve 45 to
relieve ?uid pressure from the lower end of the lift cylin
der into a reservoir space in casing 36 around the lift
cylinder. Valve 45 is turned by a long valve stem 4-6 hav
ing a handle 47 on its upper end adjacent the pump han
dle 46. When valve 45 is closed, hydraulic fluid cannot
escape from the lower end of the lift cylinder and the
thereby constitute a lift fork which is adaptable to sub
stantially all outboard motors without any auxiliary parts
or ?ttings.
FIGURES 5 to 7 show mechanism for adjusting kick
board 65 to the motor. The kick board is suspended by
a pair of rear brackets 66 and 67 which are pivotally
mounted on the lower ends of a pair of parallel bars 63
and 69. The upper ends of these bars are pivotally
lift carriage St} is held at the elevation to which it has
been raised by the pump 37. The upper end of valve
mounted on brackets 70 and 71. Brackets 70 and 71
stem 4-6 rotates in a supporting bracket 48 on casing 36. 10 are attached to a vertical hanger plate 72 on the hori»
Lift carriage 30 further includes a horizontal bar 50
mounted on the side members 32 and extending across the
zontal bar '50 of the lift carriage 30, as shown in FIG
URE 4. Thus, the kick board 65 is suspended by a
front of the two upright frame channels 20. Projecting
parallelogram linkage to maintain its vertical position
forward in horizontal parallel relation from the outer ends
as it is adjusted toward the motor.
of bar 50 are a pair of cylindrical journal supports 51, as 15
Such adjustment is effected by the crank end 74 on a
shown in FIGURE 4. The forward ends of supports 51
shaft 75, as shown in FIGURE 7. Crank end 74 is mov
are braced by inclined struts 4§ from the lower ends of
able in a slot de?ned by the rear edge of bar 63 and a
side members 32. On each supporting journal 51 is ro
book 76 so that rotation of shaft 75 will push the kick
tatably mounted a cylindrical sleeve bearing 52 having a
board forward or retract it in a rearward direction. Shaft
radial arm 53 carrying a forwardly extending support 20 75 is mounted for rotation in a pair of hanger bars 77
arm 55. The arms 55 are covered with rubber cushions
and 78 on the horizontal lift carriage bar 59. Shaft 75
or pads 56.
is rotated by a handle 80 extending from a circular plate
The sleeve bearings 52 are also equipped with crank
81 secured on the end of the shaft. Parts of this mecha
arms ‘57 which are pivotally interconnected by a link 58.
Thus, the supporting arms 55 may be rotated together
nism are omitted in FIGURES l and 4 for clarity.
When the truck is moved to pick-up position as shown
in FIGURE 3, handle 80‘ is rotated downwardly to move
and apart by a handle lever 60 on one of the sleeves 52.
Movement of the arms ‘55 away from each other is limited
kick board 65 into engagement with cavitation plate 17
by a stop pin 61 on the bar 50 ‘which engages one of the
on the motor. The kick board is then locked in this posi
arms 57, and movement of the supporting arms 55 to
tion by tightening a thumbscrew 82 in plate 81 against a
ward each other is limited by a similar stop pin 62 which 30 plate portion 83 of the hanger arm 73. Thus, the fore
is engaged by the other arm 57.
and aft position of the lower end of the motor will not
The arms 53 and 55’ are rotatable about their respective
be altered while it is being moved by the truck. Kick
journal supports 51 through angles which are slightly less
board 65 is elongated sufficiently in a vertical direction
than ninety degrees in extent. The supporting arms 55
to engage the cavitation plate on any size of motor.
are moved apart to receive the motor by pressing down 35
The various controls on the truck are all arranged for
ward on handle 6ft which rotates the arms 55 upwardly
convenient manipulation by the operator without leaving
and outwardly from the intermediate position shown in
his position behind the truck. As the operator approaches
FIGURE 4 until stop 61 is engaged by the left arm 57.
the motor from the rear as shown in FIGURES l and 3,
In such position of the parts the radial arms 53 extend up
he is wheeling the truck into pick-up position by the
wardly and are inclined slightly toward each other at 40 wheelbarrow handles 26. While holding the truck in posi
small angles from the vertical. The truck may then be
tion with his right hand on one handle 26, the operator
moved forward in FIGURE 1 to pass the arms 55 on op
can reach forward \with this left hand and raise handle 60
posite sides of the motor tower housing 15 just beneath
to swing the fork arms into gripping position on the motor.
its ?ared or flanged upper end portion 16.
Then, transferring his left hand to handle 80, a convenient
The maximum spacing of supporting arms 55 in their 45 downward movement on this handle swings the kick board
widest apart position exceeds the width of the tower hous
forward into engagement with the cavitation plate of the
ing 15 on the largest motors. When lift carriage 30 is
motor. Moving his hand forward along handle 80, the
operator then tightens clamp screw 82 to hold the kick
raised by pumping the pump handle 40, the support arms
55 are brought to bear against the under surface of the
board in adjusted ‘position. Finally, while still standing
motor frame or the ?anged or ?ared upper end of tower 50 between the handles 26, the operator may stroke the
housing 15. It will be apparent that any downward
pump handle 40 to raise the motor off its transom board
pressure on arms 55 tends to swing them toward each
support and transfer the weight of the motor to the lift
fork. Thus, the whole operation is performed by the
other, as shown in FIGURE 4, to grip the sides of the
simple manipulation of a series of conveniently arranged
tower housing very ?rmly. Continued pumping on the
pump handle 40 will then raise the motor clear of the 55 control handles, and the operator is ready to wheel the
transom 12 with the motor supported entirely on the
motor away without having left his original position at
parallel arms 55 and stabilized by kick board 65 in the
the truck handles 26.
Having now described my invention and in what man
same position it assumed on the boat.
The motor may be moved to another boat, a test stand,
ner the same may be used, what I claim as new and desire
or storage rack, and transferred thereto by opening the 60 to protect by Letters Patent is:
valve 45 to lower the lift carriage. As soon as the weight
1. In a hand truck for an outboard motor and the
of the motor has been transferred from arms 55, ‘these
like, a lift carriage, a pair of laterally spaced forwardly
arms will no longer clamp the tower housing and the
projecting journal supports on said carriage, sleeve bear
ings mounted for rotation on said journal supports, radial
truck may be backed away.
Stop 62 limits the closing movement of support arms 65 arms on said sleeve bearings, load arms on said radial
55 to a position in which the radial arms 53 are directed
arms projecting forwardly parallel with said journal sup
toward each other in positions inclined slightly upwardly
from the horizontal. This makes it impossible for the
ports, a link connected to crank arms on said sleeve bear
ings for moving said load arms together and apart in
support arms 55 to move to release position by rotating
unison, a stop limiting the opening movement of said
70 load arms when said radial arms are turned upward in
too far downwardly.
Thus, the arms 55 adjust and clamp themselves auto
slightly converging relation, and a stop limiting the clos
matically on motors of different size and the kick board
ing movement of said load arms when said radial arms
are turned toward each other to positions approaching
65 holds the motor in the same position it assumes on the
alignment with each other.
boat. The greater the weight of the motor, the more
2. A hand truck for an outboard motor and the
?rmly and rigidly it is held in such position. The arms 55 75
like comprising a pair of upright channel frame mem—
bers, an inverted U-shaped lift carriage having a hori
zontal cross member and depending side members, roll
ers on said side members running in said chainnels,
a lift cylinder between said channels having a piston rod
supporting said cross member, a cross bar on said car
riage overlying the front of said channels, forwardly
projecting journal supports on the ends of said cross
bar, inclined struts supporting the forward ends of said
4. The structure de?ned in claim 1 including further a
vertically extending kick board on said carriage engage
able with the lower portions of motors of different height,
and means on said carriage to move said kick board for
ward into engagement with a motor on said load arms.
5. The structure de?ned in claim 4, said means in
cluding a parallelogram linkage suspending said kick
board from said carriage.
6. The structure de?ned in claim 5 including crank
journal supports from said depending side members, 10 means arranged to cam said linkage forward and back
sleeve bearings mounted for rotation on said journal sup—
ports, radial arms on said sleeve bearings, load arms on
said radial arms projecting forwardly parallel with said
journal supports, a link connected to crank arms on said
sleeve bearings for moving said load arms together and 15
apart in unison, a stop on said cross bar limiting the
opening movement of said load arms when said radial
arms are turned upward in slightly converging relation,
and a stop on said cross bar limiting the closing move
ment of said load arms when said radial arms are turned 20
toward each other to positions approaching alignment
with each other.
3. The structure de?ned in claim 1 including further
References Cited in the ?le of this patent
Noros _______________ __ Jan. 10, 1950
Zenko _______________ __ July 111,
Schroeder ____________ __ Apr. 27,
Thompson ___________ .... Aug. 19,
Davis ________________ __ Sept. 8,
Ulinski ______________ __ Aug. 15,
a handle lever on one of said sleeve bearings for opening
and closing said load arms, and resilient pads on said 25
load arms.
Germany ____________ __ Ian. 24, 1957
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