US2412222A - Pump jack - Google Patents

Description

Patented Dec. 10,3 179,46

PUMP JACK 2 claims. 1

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 awindmill or by hand, and the inventionis directed particularly to the means provided for compactly arranging the mechanical vassembly so that it may be connected interchangeably, either to the reciprocating shaft of a `windmillor to therovtating power take-off'ofvan .engine or motor and effectively apply the power thus derived to a reciprocating pump rod. f Y,

Further objects and detailswill appear from a description of the invention in conjunction with the accompanying drawing whereini 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. y,

The pump jack, as shown, is mounted upon a pump I terminating in a neck II which carries the standard I2 of the pump jack. The base of the standard encircles the neck of the pump and is held thereon by set screws I3, and a shim ring I4 may, if necessary, be interposed between the standard and the neck in cases where a tight tting of the parts requires the use of one or more shim rings, thus adapting the jack for use on pumps having necks of varying diameters.

The standard at its upper end terminates in a cross head I5 to which is secured a housing I6 within which the operating parts are enclosed. The head has fitted thereinto a sleeve I1 which furnishes a guide for a reciprocating stem I8 which is secured by a coupling I9 to the pump rod 20. The stem carries a rack 2| terminating in an extension 22, which is guided within a tubular cap 23 upstanding from the housing.

The rack meshes with a segment 24 carried by a sleeve 25, mounted on a pintle 26, and having 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. The roller is carried on a pin 30 which also carries the guiding washer or head 3l to ensure proper relationship between the pin and the arm. The pin is radially adjustable within a slot 32 in a segmental portion of a spur gear Wheel 33, fixed on a stub shaft 34, journaled through the side Wall of the housing and carrying at its outer end a crank arm 35.

The crank arm pivots the upper end of a link 36, the lower end of which is pivoted to the inner end of a lever 31, medially fulcrumed on a pin Louis Kessler, Oak Park, Ill., assignor to Charles J. Muntwyler, Oak Park, Ill.

v Application November 18, 1943, Serial No. 510,7-83

' (ciu- 46) 38 and upturned at its outer end 39 to make connection, when desired, with the lower end rof a reciprocating windmill shaft y4I), which will impart rotation through the crank to the spur gear, thus oscillating the segment 24,l whichmeshes with the rack connected with the pump rod.;v

Power is alternately derived rvfrom a rotating pulley (not shown) on a motor or engine which connects with a pulley 4I on shaft 42journaled through the side walls of the housing,.which shaft has slidably keyed thereon a, pinion43,

having a grooved hub 44,` engaged bythe inner end of a pivoted clutch lever 45, vwhich maybe moved, either to engage the pinion with thegear wheel 33, or to breakthe engagement when itis desired to derive power from the windmill.L In 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. Y.

I Operation f I' "I t with the'pinion 43 thro'wnout vof mesh and the reciprocating windmill shaft 40 connected to lever 31, rotation will be imparted directly to the gear shaft and the rotation of the gear 33 will impart oscillating movements t0 the segment 24 through the slotted arm 21 and roller 29, thus reciprocating the rack. With the gear rotating clockwise in Fig. 1, the lifting stroke of the pump4 increase to maximum at the medial position and thereafter decrease to zero when the roller reaches the top position shown in Fig. 1. 'I'hus the speed of the pump stroke will alternately accelerate and retard as the rack reaches the limits of its range of movements so that no sudden reversals of movement will be imparted to the pump rod.

However, although the vertical component of movement of .the roller 29 increases as the medial position is approached, its movement will -be imparted to the oscillating shaft 26 `and segment 24 through an increasingly longer section of =the slot- .ted arm 21, so that the movement imparted to the rack While travelling through the intermediate position, with corresponding reduction in power, will not be excessive at any stage in the stroke, but will be harmoniously proportioned to secure the most effective action. Furthermore, variations in the transmission of power at differthis stage, since the pump rod is unloaded and the parts are merely restored to active position.

Whenfit is desired to derive power from an engine or motor shait, the pinion 43 is thrown into mesh with the gear 33 which imparts reciprocating movements to the rack andpump rod through the train of connections in the manner heretofore described. Obviously, moreover, if occasion shouldrequire, the lever 21 can be operated manually Yinstead of through power derived from the windmill. The invention as a, whole is of a nature which permits it to be tted as a unit to any farm pump oi' standard type and .to be operated in a manner which will effectively employ power derived either Vfrom a. rotating'element, as in the case of 4an engine or motor, or from a reciprocating element asin thecase of a windmill shaft or the like.

AI claim: f

Al pump jack adapted -to be fitted to a lfarm pump -and operable by either a motor or a Windmill and ycomprising a, housing adapted `to be tted 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 pivotally mounted at one side of the same, an arm fixed to the'vgear element and adapted Vto operate in unison therewith an-d provided with a. longitudinal slot, a rotating gear element mounted in the housing and having its axis spaced from .that

oi' the oscillating gear element, a crank carried by Y the rotating gear element and operable in the slot of said arm, a horizontal crank shaft'journaled in the housing and connected with said rotating gear element and provided with a crank arm, a lever fulcrumed intermediate of its ends and extending beyond the housing, a, link connecting one arm of the lever with said crank arm, means for detachably comiectingthe other end ofthe lever with a reciprocating actuating member of the windmill, and means for connecting the rotating gear element with a motor and for disconnecting it therefrom including a pinion meshing with said rotating gear element.

2. A pump jack adapted to be fitted to a farm pump and operable by either a motor or a windmill and comprising a housing adapted to be i'ltted to la 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 rack bar and pivotally mounted at one side of the same, an arm fixed to the gear element and 'adapted to operate in unison therewith and provided with'a, longitudinal slot, a rotating gear element mounted inthe housing and having its axis spaced from that o f the oscillating gear element, a crank carjried by the rotating gear 'element and operable in the slot oi"sai lfarn'1, a horizontal crank shaft `iournaled in the housing and connected with-said rotating gear element and provided with a crank arm, a lever Vfulcrumed interrnediateof its ends and extending beyond the housing, a link connecting one arm-oi' the lever with said crank arm, means for detachably'connecting the other 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 by a motor, and means including a clutch for connecting the pulley with the driving vshaft and for disconnecting it therefrom. n

LOUIS KESSLER..

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