US1278769A - Plunger for pumps. - Google Patents

Description

J.E .SHUTT.- PLUNGER FOR PUMPS.

APPLICATION FILED AUG-28. 1916.

Patented Sept. 10, 1918.

PLUNGER FOR PUMPS.

Application filed August 28, 1916. Serial No. 117,133.

To all whom it may concern:

Be it known that 1, JOHN E. SHUTT, a citizen of the United States, residing at Stuttgart, in the county of Arkansas and State of Arkansas, have invented certain new and useful Improvements in Plungers for Pumps, of which the following is a specification.

The invention relates to pump plungers, and particularly to plunger-s for double acting pumps employing lifting or check valves permitting an upward flow of water through the plunger as it moves down and closing to secure an elevation of the water as the plungcr moves up. The invention has for its principal objects, the provision of an improved structure of the character specified, (1) wherein means are provided for utilizing the pressure of water as the plunger moves relatively thereto to apply a turning force tending to keep the screw connections tight, (2) wherein means are provided tending to cause a quick and positive seating of the valve as the plunger moves up, (3) wherein means are provided for keeping sand and other foreign bodies away from the valve seat, and (4) wherein means are provided for causing a rotation of the valve upon its seat to grind such seat and the opposing valve surface and maintain a tight joint. One embodiment of the invention is illustrated in the accompanying drawing, wherein Figure 1 is a partial side elevation and partial vertical section through the plunger; Fig. 2 is a section on the line II-II of Fig. 1 looking down and with the valve of the plunger removed; Fig. 3 is a plan view of the structure of Fig. 1; and Fig. 4 is a plan view of the follow head with the rest of the plunger structure thereabove removed.

Referring to Fig. 1, the reference numeral 1 designates the body portion of the plunger to which the follow head 2 is screwthreaded at 8. The upper end of the body portion is provided with a nipple 41 to which the hollow tube (not shown) for reciprocating the plunger is secured, a locking nut 5 being provided to prevent accidental unscrewing of the nipple. A pair of leather packing washers 6, 7 are employed, such washers being clamped in position between the flange 8 at the lower end of the follow head and the Specification of Letters Patent.

Patented Sept. 10, 1918.

flange 9 at the lower end of the body portion, a holding collar 10 being interposed between the two washers.

The body portion is perforated, as indicated at 11. and 12, with an interposed ring 13 integral with the body portion. This part of the body portion is inclined to form a valve seat with which the valve 14 cooperates, such valve also being provided with perforations 15 and 16 so that when the valve is raised from its seat the water can flow upward through the valve. The valve is also of less diameter than the lower portion of the plunger so that a free flow of water can occur around and up past the lower edge of the valve when it is in raised position, it being understood that when the plunger is forced down the up-fiowing water lifts the valve from its seat, and that when the plunger is raised the weight of the water closes the valve.

The upper surface of the valve is provided with the annular cup shaped recess or sand pockets 17 and 18 which serve the function of catching sand and other foreign bodies and preventing it getting upon the valve seat, and also the function of giving a more positive closing of the valve as the plunger moves up, since these pockets tend to trap the water and prevent it flowing freely down past the valve. A similar annular pocket or recess 19 is provided on the body portion 2 of the valve, such pocket serving to catch sand or other foreign bodies, such as broken parts of the pump which would otherwise work down between the plunger and the well casing and cause wear or breakage.

The interior of the follow head 2 is provided with inwardly projecting inclined vanes 21 (Figs. 1 and 4), these vanes being inclined so that the force of the water as it flows upward through the follow head will tend to rotate the follow head in a direction such as will tend to tighten the screwthreads at 8 and at the other points of connection between the plunger and the surface of the ground. The body portion 1 is also provided with similar inclined vanes 22 (Figs. 1 and 3), the purpose being similar to that of the vanes 21, and in addition these vanes give the water a motion in a circumferential direction, in order to cause a rotation of the valve as hereinafter described.

The valve 14 intermediate the perforations 15 and 16 is provided with aset of vanes 23 (Fig. 2) inclined oppositely to the vanes 22, and the purpose of these vanes is to receive the impulse of the water from the vanes 22 and cause the valve to move in a rotar direction as it is lifted from its seat. This rotary movement would be imparted without the assistance of the vanes 22, but the use of the two sets of vanes increases this action. Similarly, the vanes 23 if made straight instead of inclined, would accomplish the func tion due to the rotary movement of the water caused by the inclined vanes 22. This shifting of the valve in a rotary direction is desirable as it tends to keep the valve seat free of foreign matter and to give a grinding action, keeping the seating surfaces relatively smooth so that a tight fit is always secured. The ribs or vanes as used without the pump also serve to make the structure a very stiff and durable one since these ribs provide a reinforcing for the castings.

The plunger shown is'one of the upper ones employed with a pump having a plurality of stages and the bore or opening 24 provides for the passage of the pump rod. In order to prevent binding, the lower portion 25 of the bore is tapered so as to increase in diameter from its upper to its lower portion. A free movement is thus secured even though the pump rod or one of the plungers is displaced laterally a slight amount. Various advantages incident to my construction Copies of this patent may be obtained for will be readily apparent to those skilled in the art.

What I claim is:

1. In combination in a pump plunger, a body portion perforated to permit the upward passage of water therethrough and having an inclined seat, an upwardly movable valve having seating surfaces adapted to engage said seat and having a perforation intermediate such surfaces, and a cupped surface on the valve adjacent the perforation through the valve.

2. In combination ina pump lunger, a body portion perforated to permit'the passage of water therethrough and having a valve seat, a acking washer below said seat, and an annu ar cup on the body portion between the valve seat and the washer.

3. In combination in a pump plunger, a main body portion perforated to permit the passage of water therethrough, a ring member having threaded engagement with the body portion and provided with an abutting collar, packing washers and supporting means therefor around the ring member held between the abutting collar and the body portion, and vanes on the interior of the body portion and the ring member adapted to utilize the pressure of the water flowing therethrough to tighten the threaded connection and simultaneously, the supporting means for the washers.

JOHN E. SHUTT.

five cents each, by addressing the Commissioner of latents, Washington, D. G. I

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