US660471A - Pump. - Google Patents

Description

Patented Oct. 23. |900.

No. 660,47I.

J; M. STUKES.

PU M P.

(Application led Mar. 30, 1900.)

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UNITED STATES PATENT OFFICE;

JOHN M. STUKES, OF SNYDER, TEXAS.

PUMP.

SPECIFICATION forming part of Letters Patent No. 660,471, dated October 23, 1900.

Application led March 30, 1900. Serial No. 10,815. (No model.) v

To aZZ whom it may concern.-

Be it known that I, JOHN MARION STUKEs, a citizen of the United States, residing at Snyder,in the county of Scurryand State of Texas, have invented a new and useful Pump, of

' which the following is a speciiication.

This inventionrelates to pumps in general, and more particularly to the class of liftpumps employed for pumping oil and water, and it has specific reference to the lower valve and its arrangement and also to the form and construction of the piston or plunger and its connection with the plunger-rod.

One object of the invention is to provide a cheap and efficient construction and one in which the lower valve may be engaged by the plunger-rod to place or remove the valve, the construction being such that the rotation of the rod to engage it with the valve will not rotate the plunger.

A further object of the invention is to form a plunger in which there will be a minimum obstruction to the flow of fluid therethrough as the plunger is reciprocated in the operation of pumping and in which the plungerrod will have a degree of lost motion with respect to the plunger to permit starting of the pumping apparatus, such as a windmill, and to permit ready movement of the crank of the mill over the dead-center.

An additional object is to provide a construction in which the valve of the plunger will not become sand-locked and which will be cheap of construction. Y

In the drawings lforming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is a sectional view taken through the cylinder of the pump and an adjacent portion of the pump-tube and showing the plunger and the lower valve in elevation. Fig. 2 is a section taken transversely7 of the cylinder above the lower valve and showing the lower valve in elevation. Fig. 3 is a central longitudinal section of the plunger and showing the plunger-rod in elevation, the valve of the plunger being shown as closed. Fig. -fi is a perspective viewof the metallic drum, consisting of separable parts and upon which the packingrings, of leather, are mounted, the whole forming the plunger of the pump.

Referring now to the drawings, the pump of the present invention consists of a cylinder 5, at the upper end of which is engaged a coupling 6 for the attachment of the pumptube 7, which latter has a slightly-greater diameter than the cylinder. Upon the lower end of the cylinder 5 is engaged a second coupling 8, held in place by threads in the usual manner, and the lower end ot' which coupling is interiorly threaded to permit the engagement of a suction-tube therewith when desired. This coupling 8 has an inwardly-di rected radial flange 9, disposed, preferably, midway of its ends, and the upper face of this ange is provided with a raised valve-seat 10, which seat lies concentric with the coupling and in axial alinelnent with the cylinder 5. This seat is arranged for engagement by the lower upwardly-opening valve of the pump, which valve consists of a central hub l1, said hub having radiating arms 12 of such length that they will lie close to the inner surface of the pump-cylinder and while permitting free play of the valve will prevent its overturning and its lateral displacement. The arms are separated by interspaces, as shown, for the passage of water between the hub and the wall of the cylinder, it being understood that, as shown in Fig. 1, the pump-cylinder screws down into the lower coupling to encircle the arms of the valve when the latter is upon its seat. An axial perforation is formed through the hub 11 and is screw-threaded, and with these threads is engaged a cylindrical screw 13, which is passed `upwardly' therethrough, the upper tapered end and the adjacent threaded portion of the screw projecting above the hub, while the head .of 'the screw acts to clamp a waterproof washer 14 against the under side or end of the hub. rectly engages the Vvalve-seat when the valve is in its closed position'l The'projecting upper end of the screw 13 is adapted for engagement with the upper valveupon the plungerrod, hereinafter described, and which valve has a screw-threaded socket in its lower end to receive the screw. To prevent rotation of the valve during the operation of engaging the upper valve therewith, a pin l5 is en gaged with the flange 9 at one side of the va1ve-seat and in a position to lie between two of the arms of the valve when the valve This washer di ICO is in its seat, so that the arm will strike against the pinand hold The valve from rotating. The upper end ofthe pin is tapered to a point, as shown, and the arms l2 are tapered downwardly to a narrow edge, so that in placing the valve it will not lodge upon the pin.

The piston or plunger of the pump consists of a metallic drum comprising a central tubular portion 20, at one end of which is formed an outwardly-extendingflange 21, against one face of which lies the usual leather or other form of packing-ring 22, which is disposed upon the drum adjacent to the flange. This portion of the drum upon which the packingring is placed is somewhat thicker than the remainder of the drum, so that a shoulder 23 is formell, and upon the minor portion of the drum is disposed a clamping-ring or compression-ring 24, which is disposed to engage one end of the packing-ring 22 and press it against the flange 21 to expand the ring and cause it to m'ake a tight fit in the pump-cylinder. The ring/24, is in the form of a sleeve, which has a radial flange at that end adjacent the packing-ring and which flange has its outer face concaved to engage the packing-ring in a manner to prevent its dislodgnient. The sleeve 24 in the rear of its a-nge has the same diameter as the thickened portion of the drum, and it receives a second packing-ring 25, which is expanded radially by engagement therewith of a nut 26, which is screwed onto the lower end of the drum of the plunger. This nut has its contacting face concaved, as shown. Centrally of the drum is a second tubular portion 30,

having an axial perforation, and this portion 30 is connected with the tubular drum by means of web-like spokes 3l, the po'rtion 30 forming in effect a hub for the plunger. The interspaces between the spokes 31 are substantially arc-shaped, and thus form free passages for the water in its upward flow. The axial perforation of the hub forms a means for attachment of the plunger-rod 35 to the plunger. This rod 35 has its lower portion formed cylindrical to snugly fit the perforation of the hub, and above the cylindrical portion it is formed cross-sectionally rectangular for engagement by a Wrench in the connecting and disconnecting of the parts, and the lower end of the rod is eXteriorly threaded, as shown, for engagement with an axial perforation in the plunger-valve 36. This plunger-valve is in the form of a nut, which is screwed into place and is held against displacement by means of ajam-nut 37,as shown,

this jam-nut acting also to hold a washer 38 against the upper face of the valve, so that it will be in a position to engage the end of the drum of the plunger and close the water passages or interspaces therethrough. The spokes 31, it will be noted, are recessed to receive the jam-nut when the valve is in its closed position. It will also be seen that the length of the cylindrical portion of the plunger-rod between the squared portion and the threaded portion is greater than the length of the hub, so that the plunger has an amount of sliding movement upon the rod sufficient to seat and unseat the valve. A washer 39 against the lower end of the squared portion receives contact of the plunger, so as not to injure the parts. What is above referred to as the plungerrod forms in effect the stem of the plunger, the rod proper being formed in sections, and is shown in Fig. 1 as connected by means of couplings 40 with the upper threaded and cylindrical end of the stem.

The operation of the device is as follows: The parts of the plunger being assembled, as shown in Fig. 1 of the drawings, and the cylinder having been placed in position in the well, the lower valve is engaged with the upper valve by screwing the projecting portion of the screw 13 into the lower end of the per-.

foration of the upper valve. The plunger is then lowered into the pump-tube and lowers the lower valve to its seat, so that it will lie in the position shown in Fig. 1. By then turning the plunger-rod to the left the upper valve will be disengaged from the screw 13 and the parts will be ready for operation, the drum of the plunger at this time resting against the upper valve at the lower end of the stem of the plunger. It will be noted that in this operation of disengaging the upper valve from the lower valve the stem rotates freely in the plunger, and hence the frictional engagement of the plunger with the pu n1 p-cylinder does not have to be overcome. If the plunger be then raised, the vacuum created will raise the lower valve and the water will run in in the usual manner. When the plunger is lowered, the drum thereof strikes the water and tends to compress it, with the result that the drum is raised upon its stem or rod, the upper valve is opened, and the water passes upwardly through the plunger and then into the tube of the pump. When the plunger is raised, the drum falls to lie against the plunger-valve, with the result that the passages through the plunger are closed, and the suction raises the lower valve and more water enters. This operation is continued so long as may be desired. It will be noted that in this operation of pumping the upper valve opens in the direction of the lower valve-that is, downwardly. Now after the pumping operation the column of water between the two valves is so short that the sand contained therein is not sufficient in quantity to lock the lower valve by settling thereon, the plunger acting to prevent settling' of the sand below the plunger. Furthermore, the sand that may settle from the column of water above the plunger will rest upon the upper end thereof and cannot get upon the valve to prevent its opening. Hence as the plunger is moved downwardly at the next operation of the pump the water below the plunger will be forced upwardly through IOO IIO

the sand and will carry it upwardly and out of the pump. Hence the pump cannot become sand-locked.

To prevent displacement of the plungervalve from the plunger-rod, alining perforations are formed in the valve and rod, and through these perforations is passed a pin, as shown.

It will of course be understood that in practice various modifications of the specific construction shown may be made and any snitable materials and proportions may be used for the various parts without departing from the spirit of the invention.

What is claimed is- Y In a pump, the Vcombination with acylinder having a seat, and a plunger operating in the cylinder, of an upwardly-opening Valve on the seat, comprising a central hub having radiating arms, interlocking elements con sisting of a threaded stem and a threaded socket, one of which is carried by the plunger and the other by the valve, and a tapered pin at one side of the opening of the valveseat to lie between two of the arms of the valve and prevent rotation of the valve on its seat, when the plunger is screwed into or out of engagement therewith, the arms of the valve being tapered downwardly to prevent lodglnent of the arms upon the pin when the valve is lowered by the plunger.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

JOI-IN M. STUKES.

Witnesses:

M. PERRY HAHN, GEO. H. CHANDLER.

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