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Patented Dec. 10,3 179,46
2,412,222 f
Louis Kessler, Oak Park, Ill., assignor to- Charles
J. Muntwyler, Oak Park, Ill.
v Application November 18, 1943, Serial No. 510,7-83
2 claims.
This invention relates to a pump jack which
may be fitted to a farm pump of conventional -
type for the purpose of operating the pump either
by power derived from a motor or from a‘wind
mill or by hand, and the inventionis directed
particularly to the means provided for compact
ly arranging the mechanical vassembly so that it
may be connected interchangeably, either to the
reciprocating shaft of a `windmillor to the‘ro
38 and upturned at its outer end 39 -to make con
nection, when desired, with the lower end rof a
reciprocating windmill shaft y4I), which will im
part rotation through the crank to the spur gear,
thus oscillating the segment 24,l which- meshes
with the rack connected with the pump rod.;v ~
effectively apply the power thus derived to a re
Power is alternately derived rvfrom a rotating
pulley (not shown) on a motor or engine which
connects with a pulley 4I on shaft 42«journaled
through the side walls of the housing,-.which
shaft has slidably keyed thereon a, pinion43,
ciprocating pump rod.
having a grooved hub 44,` engaged bythe inner `
vtating power take-off'ofvan .engine or motor and
end of a pivoted clutch lever 45, vwhich mayïbe
moved, either to engage the pinion with theïgear
wheel 33, or to breakthe engagement when- itis
Further objects and detailswill appear from a
description of the invention in conjunction with
the accompanying drawing wherein-
desired to derive power from the windmill.L >In
Figure 1 is a sectional-elevation of the pump
jack mounted on a pump of conventional type;
Fig. 2 is a side elevation of the pump jack; and
Fig. 3 is a sectional detail taken on offset line
3--3 in Fig. 1.
The pump jack, as shown, is mounted upon a
pump I0 terminating in a neck II which carries
order to hold the teethof the rack 2Ifinto firm
engagement with the teethrof the segment 24,:the
rack is backedbya guide arm-4B, the foot 41
_of which is screwed to a bracket. 48 secured to
thewall of the housing.
-. Operation
f I'
Y. '
"I t
the standard I2 of the pump jack. The base of
' with the'pinion 43 thro'w‘n‘out v‘of mesh and
the standard encircles the neck of the pump and
is held thereon by set screws I3, and a shim ring , the reciprocating windmill shaft 40 connected to
lever 31, rotation will be imparted directly to the
I4 may, if necessary, be interposed between the
gear shaft and the rotation of the gear 33 will
standard and the neck in cases where a tight ñt
impart oscillating movements t0 the segment 24
ting of the parts requires the use of one or more
through the slotted arm 21 and roller 29, thus
shim rings, thus adapting the jack for use on
30 reciprocating the rack. With the gear rotating
pumps having necks of varying diameters.
clockwise in Fig. 1, the lifting stroke of the pump4
The standard at its upper end terminates in
rod will begin with the roller 29 in the lower
a cross head I5 to which is secured a housing I6
middle position and moving horizontally to the
within which the operating parts are enclosed.
left. As the rotation of the gear continues, the
The head has fitted thereinto a sleeve I1 which
furnishes a guide for a reciprocating stem I8 35 vertical component of movement of the roller will
increase to maximum at the medial position and '
which is secured by a coupling I9 to the pump
thereafter decrease to zero when the roller
rod 20. The stem carries a rack 2| terminating
reaches the top position shown in Fig. 1. 'I'hus
in an extension 22, which is guided within a tu
the speed of the pump stroke will alternately ac
bular cap 23 upstanding from the housing.
The rack meshes with a segment 24 carried by 40 celerate and retard as the rack reaches the limits
of its range of movements so that no sudden re
a sleeve 25, mounted on a pintle 26, and having
versals of movement will be imparted to the
rigidly secured thereto an arm 21 provided with
a longitudinal slot 28 Within which rides a roller
29, bearing against the face of the slotted arm.
pump rod.
However, although the vertical component of
The roller is carried on a pin 30 which also car 45 movement of .the roller 29 increases as the medial
position is approached, its movement will -be im
ries the guiding washer or head 3l to ensure
parted to the oscillating shaft 26 `and segment 24
proper relationship between the pin and the arm.
through an increasingly longer section of =the slot
The pin is radially adjustable within a slot 32 in a
.ted arm 21, so that the movement imparted to
segmental portion of a spur gear Wheel 33, fixed
on a stub shaft 34, journaled through the side 50 the rack While travelling through the interme
diate position, with corresponding reduction in
Wall of the housing and carrying at its outer end
power, will not be excessive at any stage in the
a crank arm 35.
stroke, but will be harmoniously proportioned to
The crank arm pivots the upper end of a link
secure the most effective action. Furthermore,
36, the lower end of which is pivoted to the inner
end of a lever 31, medially fulcrumed on a pin 55 variations in the transmission of power at differ
2,412,222 _
ent stages in the cycle can also be attained by ad
justing the position of the roller 29 within .the
slot 32.
The return movement of Ithe rack during .the
the rotating gear element and operable in the
slot of said arm, a horizontal crank shaft'jour
naled in the housing and connected with said ro
tating gear element and provided with a crank
arm, a lever fulcrumed intermediate of its ends
down stroke of the unloaded pump rod, will ac
celerate and retard more rapidly and in increased
degree, owing to Ithe reduction in the effective
length of. the slotted arm 21 as the roller 29 at
and extending beyond the housing, a, link con
necting one arm of the lever with said crank arm,
tains its :nearest‘approach toV` the` shaft 26 >on
ofthe lever with a reciprocating actuating mem
means for detachably comiectingthe other end
which the arm is pivoted, but such increased ac 10 ber of the windmill, and means for connecting the
rotating gear element with a motor and for dis
celeration and deceleration is unobjectionable at
this stage, since the pump rod is unloaded and the ' connecting it therefrom including a pinion mesh
ing- with said rotating gear element.
parts are merely restored to active position. '
2. A pump jack adapted to be fitted to a farm
Whenfit is desired to derive power from an en
pump and operable by either a motor or a wind
gine or motor shai’t, the pinion 43 is thrown into
mill and comprising a housing adapted to be i'lt
mesh with the gear 33 which imparts reciprocat
ted to la» pump' having a vertically reciprocating
ing movements to the rack andpump rod through
pump rod, a vertically slidable rack bar adapted
the train of connections in the manner hereto
'to be connected to the „pump rod, an oscillating
fore described. Obviously, moreover, if occasion
shouldrequire, the lever 21 can be operated man 20 gear element meshing with the rack bar _and piv
otally mounted at one side of the same, an arm
ually Yinstead of through power derived from the
fixed to the gear element and 'adapted -to oper
ate in unison therewith and provided with'a, lon
’ -The invention as a, whole is of >a nature which
gitudinal slot, a rotating gear element mounted
permits it to be ñtted as a unit to any farm pump
oi' standard type and .to be operated in a manner 25 inthe housing and having its axis spaced from
that o_f the oscillating gear element, a crank carj
which >will effectively employ power derived either
ried by the rotating gear 'element and operable in
Vfrom a. rotating'element, as in the case of 4an en
the >slot oi"sai<‘lfarn'1,ï a horizontal crank shaft
gine _or motor, or from »a reciprocating element
`iournaled in the housing and connected with-said
asin thecase of a windmill shaft or the like.
AI claim:
rotating gear element and provided with a crank
arm,- a lever Vfulcrumed interrnediateof its ends
15Al pump jack adapted -to be fitted to a lfarm
pump ~and operable by either a motor or a Wind
and extending beyond the housing, a link con
mill and ycomprising a, housing adapted `to be ñt
necting one arm-oi' the lever with said crank
arm, means for detachably'connecting the other
ted toa pump having a _vertically reciprocating
pump rod, a vertically slidable rack bar adapted
to -be connected to the pump rod, an oscillating
gear element meshing with the rackv bar and piv
otally mounted at one side of the same, an arm
fixed to the'vgear element and adapted V»to operate
end of the lever with „a reciprocating actuating
member of the windmill, a driving shaft journaled
in the casing, a gear fixed to the driving shaft
and meshing with the rotating gear> element, a
pulley adapted to be connected with and actuated
in unison therewith an-d provided with a. longitu 40 _by a motor, -and means including a clutch for con
_necting the pulley with the driving vshaft and
dinal slot, a rotating gear element mounted in
for disconnecting it therefrom.
the housing and having its axis spaced from .that
oi' the oscillating >gear element, a crank carried by Y
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