US 550730 A
Description (OCR text may contain errors)
(No Model.) r R. G. STONE.
Patented Dec. 3, 1895,
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SPECIFICATION forming part of Letters Patent No. 550,730, dated December 89 Application filed March 30,1895. Serial No. 543,879. (No model.)
To all whom it may concern.-
Be itknownthat I, RUFUS G. STONE, a eitizen of the United States, residing at Garden City, in the county of Finney and State of Kansas, have invented a new and useful Pump-Valve, of which the following is a speci- :fication.
This invention relates to an improvement in pump-valves, being especially designed for use in connection with a tubular pump of large capacity for irrigating work.
The object of the invention is to simplify and improve the construction of the lower check or bottom valve, whereby it shall be well adapted to its work and all jar and pounding caused by the settling column of waterin closing the valve be obviated.
- The invention consists in certain features and details of construction, arrangement of parts, and method of connectingthe valve with the pump-stock, as hereinafterjfully described, illustrated in the drawings, and pointed out in the claims.
In the accompanying drawings, Figure 1 is a perspective view of the improved valve-scat. Fig. 2 is a similar view of the valve-ring. Fig. is a vertical section through the valveseat and valvering; and Fig. 4 is a vertical section through the pump-stock and valve, showin the. manner in which the valve is connected therewith.
Similar numerals of reference indicate corresponding parts in the several figures of the drawings.
Referring to the drawings, 1 indicates a portion of the lower end of a tubular pump-stock, and 2 the bottom thereof, forming also the valve-seat. The bottom and valve-seat are formed integrally and formed from cast-iron or other suitable material.
3 indicates an annular rim or flange extending around the valve-seat, said rim extending inwardly from a centrally-perforated bottom plate 4 and made slightly tapering or converging from its lower to its upper edge. By
means of the tapering flange 3 the bottom 4: may be driven tightly into the lower end of the pump-stock, which is usually made of wrought-iron, and when in place is adapted to be securely fastened by means of set-screws 5, passing through the pump-stock and bearing at their inner ends against the annular flange 3;
6 indicates a central perforation through the bottom plate 4, which is provided with a protecting and strengthening flange 7, and 8 indicates the valve-seat proper, which consists of acircular plate or disk superposed above the central opening 6 in the bottom a and arranged with its upper surface flush or in the same horizontal plane with the upper edge of the annular rim or flange 3. The valve-seat 8 has a smooth level upper surface and' is upheld above the opening 6 by means of suitable ribs or connecting-webs 9, interposed between the valve-seat and the an nular flange 3 and formed integrally therewith. A series of curved openings 10 are thus disposed around the valve-seat 8, between it and the annular flange 3, through which the Water entering at the central opening 6 in the bottom 4 is adapted to pass to the interior of the pump-stock.
11 indicates the valve,which is made in the form of aring composed of rubber or leather, supported beneath and carried by a cone sponding circular frame and riveted thereto in the usual manner.
12 indicates a cross-bar or connecting-strip extending centrally across the valve-ring and united thereto, by means of which the valve as a whole may be lifted from the valve-seat 8 and removed from the pump-stock with the aid of ahooked rod. (Not shown.) The external diameter of the valve is appreciably smaller than the internal diameter of the stock, thereby permitting the Water entering atthe central opening 6 in the bottom 4, and deflected by the lower face of the valve-seat 8, to lift said valve and pass outside of its periphery and thence upward.
By the construction above described the valve-ring 11 need only rise a short distance, sufficient to provide a space equal to the area of the suction-pipe, this being sufficient to afford the proper inflow of the water and thus avoiding all pounding and jarring caused by the settling column of water acting to close the said valve. 13 indicates the suction-pipe connecting With the opening or central perfo ration 6 in the bottom plate 4.
In order to make a close fitting joint be tween the annular flange 3 and the interior surface of the pump-stock and to prevent leakage at such point, a suitable calking, of fiber, tarred hemp, or other suitable packing, is applied at this point, or said joint may be calked in the same manner as the joints of steam-boilers.
Having thus described my invention, I claim 1. A check valve for pumps comprising a ring valve, a valve seat provided with a tapering annular flange, and a central opening beneath the valve seat, in combination with the pump stock, and the set screws for holding said valve seat in place.
2. In a check valve for pumps, a bottom plate provided with a central opening, a valve seat and deflector superposed above said central opening and having a diameter exceeding that of the central opening in the bottom plate, an annular flange extending around the valve seat and having its upper edge in the same horizontal plane with the upper face of the deflector but separated therefrom at intervals to leave segmental openings, and a ring valve having a flat bottom face covering said segmental openings, all arranged and adapted to operate in the manner specified. 3. In a check valve for pumps, an annular rim or flange having a tapering or upwardly converging outer face or periphery, an integrally formed bottom plate having a central opening, a combined valve seat and deflector formed integrally with said rim and having a diameter exceeding that of the central opening in the bottom plate, and the connecting webs between said rim and valve seat, substantially as and for the purpose specified.
In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.
RUFUS G. STONE. Witnesses:
A. R. CLARK, JOHN F. MILLER.