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Патент USA US3091232

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May 28, 1963
Filed Dec. 6. 1960
6 Sheets-Sheet 1
May 28, 1963
Filed Dec. 6. 1960
e Sheets-Sheet 2
May 23, 1963
Filed Dec. 6. 1960
6 Sheets-Sheet 5
May 28, 1963
Filed Dec. 6, 1960
6 Sheets-Sheet 4
May 28, 1963_
Filed Dec. 6. 1960
6 Sheets-Sheet 6
W A |_l
T ‘r
= ‘a,
United states
Patented May 28, 1963
rotate ‘as units therewith, with the cams controlling two
four-way three position, control valves which control and
Michael W. Pasture, Simsbury, Conn, and Raymond H.
direct hydraulic ?uid to the proper ends of the cylinder at
the proper time, thus synchronizing the proper valve
Holbrooke, Agawam, Mass, assignors to Pippin Con
struction Equipment, Inc., White River Junction, Vt, a
Filed Dec. 6, 1969, Ser. No. 74,040
2 Claims. (Cl. 121-63)
spool position with the rotary position of the crank and
the linear position of the cylinders.
Basically, the ‘four-way, three position metering valves
control the sequencing and synchronizing of ?uid ?ow
to the two cylinders with reel shaft rotation.
In this manner, the force of the cylinders is directed
The present invention rel-ates generally to new and
useful improvements ‘and structural re?nements in a load
moving mechanism and is directed more particularly to
the provision of a hydraulically ‘actuated device for haul
‘at all times so as to effectuate rotation of the reel in one
pistons being linked to the cams, in combination with
four-way valves for the directional control of ?uid ?ow
to the cylinders.
?uid pressure is fed’ from the pump through the four
way, three-position, control valves to the cylinders and
direction. In the course of one revolution, the cylinders
are each pushing in unison, are each pulling in unison,
ing, pulling, elevating, lifting, lowering or holding .a load,
or one is pushing while the other is pulling.
same having general utility in the arts.
By controlling the cam contour, a proper ?ow rate
Essentially, it is a means for translating rectilinear mo
may be obtained.
tion into rotative motion through the use of a pair of
lP-referentially, ?uid pressure is supplied to the ap
pivotable cylinders and pistons and cooperating integral
paratus hereof by a pump capable of producing seven
cams mountedv upon a rotatable drive shaft, with the
teen gallons .per minute at a pressure of 2000 psi. The
thence to two, parallel acting, three-position, control
It will be helpful to an understanding of our invention
valves mounted upon the main frame or housing.
to ?rst brie?y consider some of the essential points and
The three-position control valves operate in conjunc
more important features and aspects thereof, so that 25 tion with a control lever and allow the spool or reel to
same may be kept in mind during the subsequent reading
rotate forwardly or pay out, to rotate rearwardly or pull
of the detailed description of the practical embodiment of
in, to hold (-and/ or to allow) the load to rotate the spool.
our improvements and of the illustration thereof in the
It is a principal object of the present invention to pro
hereunto annexed drawings.
vide load moving apparatus for translating rectilinear mo
Accordingly, it is ?rst to be noted that our invention
tion into rotative motion by means of two pivotable
may be employed either on mobile or stationary sup
cylinders and pistons linked to integral cams rotatable
porting structures. It may be mounted on the rear of a
on a drive shaft, said pistons being approximately 90°
tractor or other vehicle, on a wall, or on other stationary
‘out of phase in order to avoid so-called dead spots or
supporting surfaces. Its use is limited only by the avail
dead center. Stated ‘otherwise, when one piston is at
ability of pumping means to supply the fluid power nec
the extreme forward position of the stroke or at the ex
essary to drive the pistons thereof.
treme rearward posit-ion, the other piston provides a full
Norm-ally, conventional hydraulic motors must be
geared down to develop high torque. Road machinery,
thrust to move its counterpart over the centerline or the
dead spot.
Still :a further object is to provide ‘a load-moving ap
generally require low speeds with high ‘loading charac 40 paratus having incorporated into its construction novel
spring-loaded clutch and drag mechanisms which’ may
In contradistinction, we have devised a novel means
be actuated readily by the operator to achieve controlled
whereby these d-i?iculties and objections are overcome.
free spooling so that the cable may be unwound by hand
We accomplish this by the provision of a device which
without danger to the operator.
provides high torque while ‘running at low speed thus 45 One salient [feature hereof is that the spool or reel may
construction and agricultural equipment and lift devices
avoiding mechanical speed reduction and eliminating the
aforesaid objectionable inconveniences.
be caused to rotate-in either a forward or reverse direc
tion with facility.
It is therefore an ‘object of the invention to furnish an
Still- another feature worthy of particular note is the
improvement in the art which, on the basis of the factors
construction of the housing or main framework which is
involved, is capable of solving the di?iculties encoun
so designed as to protect the drum or spool‘ ‘and to posi
tered and is easily operable by one man for the ready
tively preclude the possibility of the‘ cable or line from
accomplishment of the functions for which it is designed.
jamming between the reel and the housing.
Basically, the apparatus hereof comprises two double
To make the manufacture of the load moving appara
acting single rod end cylinders which are mounted with
tus a more pro?table undertaking, the mechanism em
respect to 1a reel or spool. The cylinders are pivoted at 55 bodying the essence of the invention has been engineered
their piston ends to a pin which is anchored in the frame
in manner as to be simple in its construction so as to
or housing, while the rod ends of the cylinders are con
expedite economical large-scale production and assembly,
nected to a crank ‘arm and are restrained to move in a
the usual complexity of components having been so great
ly reduced as to offer a compact design representative of
the crank arm. The crank arm and reel ‘are keyed to a 60 a fundamentally new concept in the combining and co—
reel shaft which rotates as an integral unit, with the
acting of its various parts.
rotary motion while actuating a pin at the extremity of
crank arm and reel either drawing in or playing out a
cable disposed upon the reel.
The reel and crank are
supported by the reel shaft, which is in turn supported by
and journalled in the main frame or housing. The
cylinders are supported by the main ‘frame at their pivot
ends, :and by the crank end pin at their rod ends. The
Precision of relative dimensioning of parts as militates
against inexpensive manufacture, simplicity of mainte
ing radius, thus insuring that at no time does the condi
nance and care, and consistency of performance in prac
tical use have been assiduously borne in mind in the de
velopment of the present invention.
Too, We provide a hydraulically actuated device of the
abovementioned character in which ruggedness and dura
bility of construction are combined with simplicity of
tion exist wherein both rod ends are at dead center.
Cams are mounted integral with each of the cranks and
use and with simplicity and ease of use.
cranks are mounted upon the reel shaft approximately
90° out of phase, one with the other, on the same turn
protection against usual but hard conditions of practical
and replacement purposes with a consequent reduction in
maintenance costs over related devices heretofore known.
parallel, cylinder housings generally indicated by 8 ?xed
to and extending forwardly from its forward face adjacent
its outer, vertical, side edges.
The cylinder housings 8, of the pair thereof, each have
To provide apparatus which effectively meets the re
quirements therefor and perform its functions in a prac
an upper wall 10 which extends generally horizontally
outwardly ‘from the rear wall 6 to meet and merge with
KFurther, while the components are uniquely compact,
they are nevertheless readily accessible for maintenance
tical and dependable manner is among the dominant aims
an angularly downwardly and outwardly extending for
ward wall 12 which curves gently inwardly and upward
of this invention.
ly at its lower extremity to form a generally U-shaped cam
The objects of the invention are susceptible of attain
ment by use of constructions different in certain respects 10 ‘housing 14. Said cam housing 14 joins with a horizontal
ly outwardly extending wall 16 at the lower horizontal
from that disclosed, such as minor changes and variations
edge of the rear wall 6 to form the lower wall of the
in dimensions, shape, form, proportion, integration, co
cylinder housing.
operation of material and/ or type of subassembly and
Spaced bosses 18 and 20 project laterally outwardly
accessory, all without departing from the underlying prin
15 from an inner vertically-disposed wall 22 de?ning the
ciples, salient features, scope and spirit hereof.
While all of these objects are attainable in the preferred
and disclosed embodiment, it is to be understood that,
inner side wall of each of the cylinder housings adjacent
the upper and lower extremities thereof respectively,
which bosses are interconnected by an angularly disposed
by utilizing the invention only in certain of its aspects,
brace wall or web 24.
certain of the objects may be attained individually or in
sub-groups without necessarily attaining all of the objects. 20 The bosses 18 and 20 are suitably apertured rto accom
That is, while the advantages of the invention as here out
lined are best realized when all of its features and instru
mentalities are combined, useful embodiments may be
modate components in manner subsequently to be de
A central angularly-disposed Wall 26 is disposed be
tween the spaced side walls 22 of the cylinder housings
The characteristic features which we consider to be 25 8 forwardly of and spaced from the rear wall 6 and is
provided at its lower extremity with a central, upwardly;
novel with our invention, as to its construction and or
extending, cut-out portion 28 whereby ready access to
ganization and as to its methods of manufacture and
certain of the winch components, subsequently to be de
operation, will be better understood from a consideration
scribed, may be obtained.
of the following detailed description forming a part of
Referring to FIG. 3, it will be observed that the outer
this speci?cation, when read in conjunction with the illus 30
face of the lower portion of the wall 22 of each of the
trations in the accompanying drawings, wherein like char
cylinder housings is provided with an annular shoulder
acters of reference are employed to designate like or
or ?ange 30, which ?anges are of suitable size to accom
corresponding parts throughout the several views and in
modate the rim of a reel or spool when same is disposed
FIG. 1 is a perspective view, showing the load moving 35 between the cylinder housings 8.
The frame or housing 4 may be ?xed to the rear of
apparatus hereof mounted upon a tractor;
a tractor T or to any other suitable surface, such as a
FIG. 2 is another perspective view of the load moving
building wall as by brackets 32 extending rearwardly
apparatus hereof;
from the rear wall 6 thereof.
FIG. 3 is an enlarged view, in perspective, showing the
Cylinders 34 are provided within each of the cylinder
main frame or housing of the apparatus;
housings 8 and extend between the respective bosses 18
*FIG. 4 is an elevational view of the load moving ap
and 26}, with the closed end of the cylinder being pivoted
paratus of the invention;
produced involving less than the whole.
FIG. 5 is an enlarged top plan View of the cam means
upon ‘a shaft 36 extending outwardly from the boss 18
and the outer end of the piston of the cylinder being
of the invention;
FIG. 6 is a top plan of the apparatus of the invention; 45 pivoted to a pivot shaft 38 extending outwardly from a
cam 40, subsequently to be described, disposed adjacent
FIG. 7 is a sectional view taken on the line 7-7 of
the lower boss 20.
FIG. 6;
Cams 40 are journalled upon and keyed to the oppo
vFIG. 8 is an enlarged, fragmentary, sectional view taken
site ends of a horizontal drive shaft 42 which extends
on the line 8-8 of FIG. 4; and
‘FIG. 9 is a schematic representation of the hydraulic 50 between and into each of the cam housings 14 and is
assembly of the apparatus of the invention.
In the following description and in the appended claims,
various components and details thereof will be identi?ed
journalled in the respective bosses 20.
Each cam 40 has an outer periphery provided with a
cam face 44' and an outermost body portion 46 of more
or less rectangular con?guration extending outwardly
by speci?c names for purposes of convenience. The
phraseology or terminology herein employed is for the 55 from one side thereof.
A pair of spaced openings 48 and 50 extend transe
purpose of description and not of limitation. Although
versely through each cam 49 and body portion 46 there
speci?c terms and expressions are employed for purposes
of and are of appropriate size to receive therein the pivot
of identifying various components, they are used in a
shaft 38 and the drive shaft 42 respectively.
generic and descriptive sense only, they being intended to
A four-way, three-position, metering valve 52 of con
be as generic in their application as the art will permit 60
ventional design is mounted upon the inner wall 22 of
and not intended to exclude any reasonable equivalents
each cylinder housing 8 as by bolts 54. Each of the
of the features shown and described or portions thereof.
valves 52 of the pair thereof is provided with an angularly
With continued reference now to the drawings, which
downwardly-extending nose or plunger 55 which contacts
illustrate a typical and preferred embodiment of the in
vention for the purpose of disclosure and forms a part 65 the outer periphery of its respective cam 40.
A pair of four-way, three-position, control valves 56
of this speci?cation, we have shown a load moving mech
of conventional design is mounted upon the forward face
anism or, winch generally indicated by numeral 2.
of the rear wall 6 of the housing 4 intermediate the cylin
' While the apparatus will be described and illustrated
der housings S as by bolts 58 and nuts 60 in spaced re
speci?cally in operative relation to a tractor, it will be
understood that it may be mounted upon other vehicles 70 lationship as to each other.
Said control valves 56 are operated in tandem by an
or upon stationary surfaces having the necessary ?uid
power source.
L-shaped control lever 62 having a horizontally extend
ing arm which extends through aligned openings provided
The winch housing or casting or main frame is gen
erally indicated by 4 and is comprised of a vertical gen
in a pair of spaced lugs 64 extending upwardly from the
erally rectangular rear wall 6 having a pair of spaced, 75 upper end of said rear wall 6.
Spaced ?ngers 66 project outwardly from this hori
ceivable within the notched outer extremities of valve
each of the valves 52. Lines 112' and 114' similarly
lead from the coupling 110’ to each .of the valves 52.
Lines 112 and 112’ lead from one of the- metering
stems 68 which project upwardly and outwardly from
valves 52 of the pair thereof to one of the manual con
zontally-extending arm of the control lever and are re
each of the control valves 56.
Referring to FIG. 4 it will be observed that a clutch
lever 79 has an upper extremity which extends vertically
trol valves 56, while lines 114 and 114’ lead from the
other of the metering valves 52 of the pair thereof to
the other of the manual control valves 56.
above the upper horizontal‘ plane of the housing 4, inter
The lines 112 and 112’ pass from one of the control
mediate the walls 6 and 26 thereof and a central portion
valves 56 to opposite ends of one of the cylinders 34,
which extends angularly downwardly adjacent the inner 10 while lines 114 and 114’ pass from the other of the
Wall 22 of one of the cylinder housings to terminate at
control valves 56 to the opposite ends of the other of
its lower extremity in a U-shaped clevis 72, the opposing
the cylinders 34.
arms of whichv are offset and slotted or cut out as at 74,
It will be understood that the position of each of the
as seen in FIG. 8, to engage an inwardly-extending, hori
zontally-disposed pin or shaft 76 upon which a clutch
means subsequently to be described, is mounted.
Said clutch lever 70 is pivoted to the housing by means
of a bolt 78 which passes through a suitable opening in
the forward wall thereof and through the clutch lever
70 adjacent the lower extremity thereof. A nut 80 is
threadedly engaged with said bolt 78, which nut embraces
valvesSZ, relative to its respective cam 40, will determine
the direction of ?ow of the pressurized ?uid. Stated
otherwise, the cam is rotated by the force exerted from
the respective piston so that, as the cams rotate, they
actuate the metering valves which divert the ?uid to one
or the other end of each of the cylinders.
By manipulation of the control lever 62, the direction
of ?ow may be reversed thereby enabling the operator to
the forward face of the wall 26.
wind or to *unwind the spool.
As shown in FIG. 3, the inner or rearwardly extending
As the cams rotate,lthe plungers 55 of the metering
face of Wall 26 is provided with indentations or grooves
valves 52 are engaged thereby metering oil to the upper
82 adjacent its upper horizontal edge to offer a cammed 25 or lower ends of the respective cylinders at the proper
planar surface along which clutch lever 70 may be moved
moment. When oil is fed to "the base of the cylinder, the
in the actuation of the clutch.
rod end is caused to move forwardly thus causing the re
The clutch means, journalled upon the pin 76 com
spective cam to rotate. Before the cam reaches dead
prises a generally A-shaped hub-engaging means 84 which
center, the oil is diverted to the tank momentarily, and
rides in and grips an annular groove or slot 86 provided 30 then is fed to the opposite end of the respective cylinder
in a shoulder 88 of a clutch plate 90.
thereby pulling the cylinder through its remaining ap
Said clutch plate 90, of generally annular con?guration,
is provided with a plurality of outwardly extending, cir
proximate 180“ of travel.
The other cylinder being offset by some 90° relative
cumferentially arranged pegs or pins 92 which are receiv
to the ?rst-named cylinder assists in avoiding a dead cen
able in suitable openings provided in the rim of a reel or 35 ter. When the right hand cylinder is at its dead spot, the
spool 94. A tension spring 96 is disposed upon the
left cylinder is at its peak force, and vice versa.
shaft 76, intermediate the hub-engaging means 84 and the
It will be understood that the cams and the spool or
wall 22 of the cylinder housing.
In the operation of the clutch mechanism hereof, the
drum are mounted on a common drive shaft so that, as
the cams rotate, the drum rotates to wind or unwind the
operator may exert a lateral pressure upon the upper ex 40 cable or wire disposed upon the drum, same being de
tremity of the clutch lever 70 thereby causing it to push
termined by the position of the control lever 62 and the
consequent settings of the control valves 56.
It is believed that the gist of the invention will be
82 provided therein. Pivotal movement of the lever
clearly understood from the foregoing disclosure and ac
has caused the engaging means 84 to exert a horizontal 45 cordingly, further analysis thereof at this point is con
force upon the clutch plate 90, thereby to compress the
sidered unnecessary, as we have, in accordance with the
spring 96 and to cause the pins or pegs 92 to be re
provisions of the patent statutes, described the construc
moved from engagement in the openings provided in the
tion and principle of operation of the invention together
rim of the spool 94.
with the apparatus which we believe to represent the best
When clutch engagement is desired, the operator may 50 embodiment ‘thereof, to the end that others can, by ap
move the lever from its position of engagement in the
plying current knowledge, readily adapt it for various ap
upon the bolt 78 and to move along the cammed upper
edge of the wall 26 to engage in one of the indentations
indentation 82 whereupon the lever will again pivot upon
the bolt 78 to release the compression upon the spring
plications without omitting features which, from the
standpoint of prior art, fairly constitute essential char
96 and thereby to cause the clutch plate to move in a
acteristics of ‘its generic and/ or speci?c aspects. The sub
horizontal path toward the spool so as to bring the 55 stitution of equivalents and other changes, modi?cations
pegs or pins 92 into engagement with the openings pro
and alterations as circumstances may suggest or render
vided therein.
expedient, are reasonably contemplated, the invention be
Referring to FIG. 7, it will be seen that the drum or
ing susceptible of such without departing from its real
spool 94 is provided with a core or cavity 95 centrally
spirit or underlying principles.
thereof to accommodate a drag brake 98, having a hori 60
The claims are desired to include within the scope there
zontally-extending lower wall 100 which embraces the
main drive shaft 42.
A set screw or bolt 102 extends
of all of said suitable variations, modi?cations and equiv
alents by which substantially the results of the invention
may be obtained through the use of substantially the
vertically through the hub of the spool to engage an
upper horizontal Wall 104 of the brake. By rotation of
same or equivalent devices or means. Accordingly, limi
the bolt 102, the pressure or drag of the brake 98 upon 65 tation hereof should only be made as determined ‘by a
the drive shaft may be increased or decreased so as to
proper interpretation of the prior art and the scope of
permit faster or slower rotation of the reel, all as may
‘the subjoined claims, in which it is our intention to claim
be desired.
all novelty inherent herein as broadly as possible.
Referring tto FIG. 9, the hydraulic assembly of the
We therefore particularly point out and distinctly
loading mechanism hereof will now be described. Fluid 70 claim as our invention:
pressure is introduced to the mechanism through a pair
1. A hydraulically-actuated device for providing me
of couplings 110 and 110' mounted on the rear wall 6
chanical rotary motion from rectilinearly actuated cylin
of the housing. The pressurized ?uid is diverted through
ders comprising, a frame, a drive shaft rotatable rela
said couplings 110 and 110' to each of the metering valves
tive to said frame, a double-acting single-rod end cylin
52. Lines 112 and 114 lead from the coupling 110 to 75 der pivotally mounted adjacent its upper end on said
frame at each sideof said frame and a pistonin each
said cylinder, a crank arm pivotally connected to each
said piston, a pin disposed on each said crank arm and
actuated by the rod end of each of said pistons, said crank
arms being keyed together by means of said drive shaft
four-Way three-position control valves are mounted upon >
said frame and are operated in tandem by a common con- -
trol lever, each of the valves of the pair thereof control
ling the ?ow of hydraulic ?uid to the four-way three-posi
tion metering valves of the pair thereof.
for rotation as an integral unit, a cam ?xed to each of
References Cited in the ?le of this patent
said crank arms and to said drive shaft, a four-way three
position metering valve connected to each of said cyl
inders, each said metering valve being positioned adjacent
one of said cams and including a plunger adapted to con
tact the periphery of its respective cam whereby each said
valve is controlled by said cams, said metering valves
controlling the ?ow of hydraulic fluid to the ends of said
cylinders for synchronizing the positions of said valves
with the rotary position of the respective said crank arm 15
and the linear position of the respective said cylinder, a
pair of four-way three-position control valves linked to
said metering valves, and manually operable means for
reversing the direction of ?ow of hydraulic ?uid from
said control valves to said metering valves for e?ectuat 20
ing the forward or reverse rotative action of said drive
2. In the device as set forth in claim 1, wherein said
Ross ________________ __ Mar. 21, 1882
Pendlet'on __________ "Sept. 19, 1882
Nickerson ____________ __ Feb. 15, 1887
Gale ________________ ..._ Feb. 19, 1889
Gale ________________ __ Dec. 3, 1889
McGrath ________ __'____ Apr. 19, 1904
Pfetfer ______________ _._ Dec. 13, 1921
Thomas ______________ __ May 5,
Serversky ____' ________ __ July 23,
Rockstrom et al _______ __ Nov. 29,
Bennett ______________ __ Aug. 24,
Lado ________________ __ Oct. 29,
Thorpe ______________ __ June 3,
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