US1628702A

US1628702A - Pump jack

Info

Publication number: US1628702A
Authority: US
Publication date: 1927-05-17
Anticipated expiration: 1944-05-17

Description

May 17, 1927. 1,628,702

W. E. WENTWORTH PUMP JACK Filed July 13, 1926 2 Sheets-Sheet 1 Patented May 17, 1927.

UNITED STATES WILLIAM E. WENTWORTH PUMP Application filed July 13,

This invention relates to improvements in pump jacks and has as its general object to provide a pump jack which will be steady and positive in its operation and simple 1n construction, and which will embodyl means whereby the stroke of the pump rod may be varied as occasion requires.

` Another object of the invention is to'provide a pump jack which may be` operatively 1o connected with the pump rod regardless of the distance to which the rodextends above the ground surface, thereby obviating-adjustment which would otherwise be required in operatively assembling the pump jack with the said rod.

In the accompanying drawings:

Figure 1 is a side elevation of the pump jack embodying the invention.

Figure 2 is a front elevation of the lower portion of the pump jack. t

Figure 3 is a detail plan View of the upper end olf the swinging post of the jack and the connection provided between the same and the liexible element which leads to the pump rod. l

Figure Ll is a detail horizontal sectional view taken substantially on the line -Jl of Figure 1, looking in the direction indicated by the arrows.

Figure 5 is a similar View on the line 5-5 of Figure 1, looking in the direction indicated by the arrows.

Figure (3 is a detail horizontalsectional View on the line 6-6 of Figure 1, looking in the direction indicated by the arrows. t

l Figure 7 is a similar view on the line 7-7 of Figure 1, illustrating` the connection b'etween the liexible motion transmitting member` of the jack and the pump rodto be reciprocated.

, The jack embodying the invention con prises a pair of base sills 1 which are preferably embedded in the ground adjacent the pump'casing2 and upon which sills are mounted base platesy 3 and 4 bolted or otherwise secured in place and support-ing the parts comprising the structure7 the plates serving likewise to relativay brace the said sillst so that thek structure will be supported ina substantial manner. The numeral 5 in-V dicates in general an upright comprising a pair of channel beams between the lower ends ot which there is bolted `or otherwise secured the lat-sided shank 7 ot a pivot member 8 which is provided at the lower endy ot its shank with shoulders 9 upon llafd PATENT OFFICE.

, 0F SAN ANTONIO, TEXAS.

JACK.

1926. Serial N0. 122,223.

:which the Vlower ends ot the said channel beams rest. as clearly shown in Figures 1 and of the drawings. The pivot member 8 is disposed between two bearings 10which are cast upon the plate 3, and a short shaft 11 is journaled in the said bearings and eX- tends through an opening in the said pivot member 8 so as to support the upright comprising the channel beams 6 normally in an upright position and yet` permit of downward swinging movement thereof under conditions to be presently explained. Disposed between the upper portions ot the beams and bolted or otherwise secured in place, is a head 12 having shoulders l3nt its opposite sides engaging the rear sides of the channel members 6, the head 12 being formed with va pair of spaced ears 141. rThe numeral 15 indicates a brace for `maintaining the upright 5 in vertical position7 and this brace comprises an eye beanithe web of which is cut away at its upper end so asr to accommodate the ears 111-, a pivot bolt 16 being litted through the side flanges ot' the eye beam at the said upper end thereof and through the said ears, as clearly shown in Figure 4 of the drawings. The lower end of the brace 15 has its web cut away in a similarnianner so that its side anges at its said end will straddle spaced ears 17 which are integrally formed upon the base plate l and extend forwardly therefromJ a bolt 18 being iitted through the said ears 17 and through the said liangesof the brace 15, as shown in Figure 5, so as to secure the said end of the brace to the base plate.

Bearings 19 are formed upon the base plate 4, and a shaft 20 is journaled in the said bearings and extends through alined f openings in plates 21 which are bolted, as at 22, to the opposite sides of a rocking beam 23, the said plates having side flanges 24 engaging the opposite edges of the said beam. The numeral 24 indicates in general a saddle member which is mountedat the upper end of the rocking beam 23 and comprises a body 25 having spaced ears 26 straddling the rearedge of the said beam 23 at itsupper end, Aa bolt 27 being fitted through the said ears and through said beamy Y to secure the body 25 to the beam. The body is formed with a transverserecessor seat 28 in whichl is engaged one end of a rectangular link 29, and ahook 30 is connected to theother end of the link, the link straddling the upper end of thel beam,v and one rod 31 of an adjustable connection comprising a threaded rod 32 and a turn-buckle 33, is secured to the shank of the said hook 30, the rod 32 of the adjustable connection being connected as at 34, to one end of a sprocket chain which is indicated by the numeral 35 and which passes about a sprocket gear 36 mounted upon Aa shaft journaled in bearings 3S secured in the channels of the vmembers 6 of the upright at their upper ends. The other `end of the sprocket chain 35 is connected, in a manner which will now be described, with the pump rod, which is indicated by the numeral 3S).

The means provided for connecting'the last mentioned end of the chain 35 with the pum-p rod 39 comprises a clamp consisting o-f-a ymember 40 which is provided in oneside with an :approximately semi-cylindrical recess or `seat 41 to embrace one side of the said -pump rod 39, and the said member is provided with a pair of upstanding ears 42 between 'which and an intermediate upstanding portion 43, `the leaves of the lowermost llink of said chain at its said end are received, these Vleaves being indicated by the numeral 44. A bolt 45 is fitted through the said ears and the said portion 43 and likewise through the link leaves and serves to connect `the chain to the said clamp member. The Iother member of the clamp, indicated by the numeral 46, is likewise provided with an approximately semi-cylindrical seat 47 to embrace the other side of the said pump frod,

' and bolts 48 lare secured `through .the said members 40 Iand 46 and are tightened to clamp `the rod. The numeral 49 indicates is provided withvspaced ears 51 which stradan :eye member is connected with the chain 35 above *the clamp just described, and this eye member 'accommodates a portion lof the rod above lthat portion which is engaged between `the clamping members v40 and 46, and

in Ithis manner, lthe kchain ris adapted to have a substantially rigid two-point connection with the rod so as to insure offsteady 'vertical reoiprocation thereof, and it will be understood lat thisapoint `that the means provided for 'connecting the chain to lthe rod lpermits of adaptation of the chain `to pump rods regardless yof the distance to `whichthey ueX- tendabove the supper end fof the pump `casing, so that an adjustment is provided at this `polnt obviating the necessity of making the adjustment at the point of location of the turnbuckle 33, vthis latter adjustment "being made use of after the. chain )has been connected with `the pump rod, if `it sliouldbe found necessary to effect further very slight adjustment.

4The numeral 50 indicates in general a saddle member correspondiner tothe saddle member 24, and this said saddle member 5() die `:the forward vedge of the upright beam 28, a bolt 52 being fitted through the said gaged 'one end of a link 55 of the same w formation as the link 29, and a hook 56 is engaged with the other end of the link and has connected 'to it one end of the cable 5T which leads to the usual operating means for ythe jack (not shown). At this point it will `be evident that by vertically adjusting the saddle 50 upon the rocking beam 53, the throw ofthe beam may be adjusted so as to vary the length of the stroke imparted tothe pump rod 39.

From the foregoing description Iof sthe -invention it will be seen that there is provided an exceptionally substantial and durable construction of pump jack which will `operate to impart a steady reciprocatory motion tothe pump rod with which it is connected and the Athrow of the rocking beam of which jack may be conveniently varied so as to vary the length of stroke of fthe pump rod. It will also ab'e evident vthat when itis desired to pull the well, the jack may be readily folded into compact form by disconnecting the yclamp 40 and the eye `member 49 from the pump rod, removing the bolt 18 or the bolt 16, either as may be `desired or Vfound expedient, lowering `the upright 5, and swinging the rocking beam 23 downwardly, so that the vparts will `all occupy a position extending above the said structure of the device.

`Having thus described the invention, what I claim is:

1. In a pump jack, base sills, a baseplate mounted thereon and iconnecting vthe same near one end, bearings upon ythe said base plate, a shaft mounted in the bearings, la bea-ring member V-upon the shaft -betweensaid bearings, spaced uprights secured at their lower ends to the saidbearing member 'at opposite 'sides thereof, a wheel journaled for rotation between the upper ends ofv the uprights, a bracket having a shank secured between said uprights and side arms extendingacross the uprights to brace the bracket, a base plate mounted upon 'the sills near the other :ends thereof and Iconnecting the same, a 'brace connected pivotally at its upper end to said bracket and at its lower end separably connected to the last mentioned base pla-te, a rocking beam ymounted upon the 'last mentioned base plate, means 'for imparting rocking motion to the beam, a Hexible element connected to the beam'a'nd passed over the said wheel, and means carried by the fiexible element for connection to a pump rod.

2. In a pump jack, a' base structure, an upright mounted thereon, a wheel journaled upon the upright, a beam mounted for rocking movement upon the upright and `having a plurality of openings arranged in a series extending parallel to one edge thereof, a saddle having` a portion straddling the other` edge of the beam at the upper end thereof and provided with a seat, a fastener extend ing transversely through the saddle and beam, a link engaged at one end in the seat and straddling the said end of the beam, a flexible element connected to the said link and passing over the said Wheel, means ear ried by the flexible element at the other end thereof for connecting the same to a pump rod, a second saddle disposed to straddle the first mentioned edge of the beam and having openings therein for registration with the openings in the beam selectively, a bolt fitted through the openings in the second mentioned saddle and .interchangeably in the openings in the said beam, the saddle having a seat, and a link engaged at one end in the seat in the second mentioned saddle and straddling the beam for the connection thereto of means for imparting rocking motion to the said beam.

2S. In a pump jack, an upright, a Wheel .mounted thereon, a rocking beam, means for imparting rocking motion to the beam, a flexible element connected to the rocking beam and trained over said wheel, a Clamp at the lower end of the said flexible element for connection With a pump rod to clamp the same at a point in its length, and a member carried by the flexible element and spaced above the clamp to engage the said pump rod at a point above the point at which it is engaged by the clamp.

ln a pump jack, an upright, a sprocket gear mounted for rotation at the upper end of the upright, a rocking beam mounted at its lower end for oscillatory movement in spaced relation to the upright, a saddle ad-` justably mounted on saidfbeam, a sprocket chain trained about the sprocket gear, means at one end of said chain clamping the same to a pump rod, a link disposed about said' beam and engaged with the saddle, means connected With the chain and detaehably engaging said link at the opposite side of thebeam from said saddle, and means for oscillating' the said rocking beam.

In testimony whereof I affix m. sio'nature.

WlLLIAM E. WENTVVORTL L. sfj.r