US710856A - Pump. - Google Patents

Description

Patented Oct. 7, |902.

G. E. GREEN.

PuM P.

v (Application filed Feb. 15, 1902.)

(No Model.)

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GEORGE E. GREEN, OF GREENOASTLE, MISSOURI.

PUMP.

SPECIFICATION forming part of Letters Patent No. 710,856, dated October '7, 1902.

Application filed February 15, 1902. Serial No. 94,197. (No model.)

To all whom t may concern.-

eitknown that l, GEORGE E. GnEnN,acit Zen of the United States, and a resident of Greencastle, in the county of Sullivan and Slate of Missouri, have made certain new and useful Improvements in Pumps, of which the following is a specification.

My invention relates to that class of pumps commonly known as double-acting-that is, pumps having means for causing a continuous flow of water from the egress-tubes; and the invention consists in certain details of construction which I will now proceed to describe, reference being had to the accompanying drawings, which form a part of this speeitication, and in which- Figure l isacentral vertical section through all the working parts. Fig. 2 is an inverted plan View of the top casting connecting the cylinder and side tubes; and Fig. 3 is a top plan view of the lower casting connecting the parts mentioned in Fig. c., the cylinder and side tubes.

In the drawings, A denotes the cylinder, and B B the side tubes. The cylinder and side tubes are connected at their upper end byaspecial casting C and are also connected by a second casting D ot novel construction at their lower ends. The upper casting is provided with a threaded outlet E, adapted to connect a delivery-pipe, and the lower casting has an inlet-opening F, threaded similar to the outlet E in the upper casting for connecting a supply-tube, as will be understood. As shown in Figs. 2 and 3, both castings C and D have an enlarged seat or socket G, adapted to receive its respective end of the cylinder A, and the sockets contain a threaded opening H. Between the opening I-I and the side walls of the sockets is a curved opening I, communicating with a threaded opening .I at one end of the casting. It will be noticed that the opening I in one casting is on one side of the socket G, while the like opening I of the other casting is located at an oppositeside ofthe socket. Each casting is also provided with a threaded opening K, which with the openings H ot both castings com municate with a passage-way I., as shown in Fig. 1 of the drawings.

The opening II of the lower casting is closed by a downwardly-seating or gravity valve M,

supported by a stem N, passing through and guided by a cross-bar or web O of a ringshaped or hollow plug P, screwed into the opening II. 'lhe movement or play ot the valvekM is limited by a nut Q, threaded on the lowerend of the stem N. The lower end of the side tubes B are threaded into theirrespective openings J K of the lower casting D, and the upper end of said side tubes screw into a thimble R, threaded into the openings J K ot the upper casting C, and the said thim bles R form seats for a down wardly-seating or gravit-y valve S, having suitable guidepins, as shown. In the opening` H ot the upper casting is also threaded an annular seat 'F for the valve U, arranged and having sliding motion on the piston-rod V. The valve U should be packed, as shown, to prevent leakage.

In the casting O, I provide a stop IV to limit the movement ot' the valve UQ 'lhis stop, as also the stops B', is formed in one piece with the casting. It is obvious that the ends of cylinder A should Ybe packed to prevent leakage, such as with a rubber gasket in the sockets G.

In the manufacture of my pump the castings O Dare each molded in one piece by well-known hollow-molding methods. The cylinder A may be of brass, while ordinary iron tubing will answer for the side tubes B.

In assembling the several parts of my pump the cylinder A is arranged in the socket of the lower casting after arranging the valve M in place and the tubes B screwed in the openings .I K of said casting, as shown. Before connecting the upper casting the valve U is placed on the piston-rod V and the thimble T, forming the valve-seat, is screwed to place, as shown. The thimbles R have internal as well as external threads-z'. c., the latter are reverse to therinternal threadsthus providing each thimble with a right and a left thread. Now having arranged the valves S in place and the thimbles R started into the openings J K the casting C ismoved until the inner reverse thread ofthe thimbles engage with similar threads on the tubes B, when by continuing to turn the said thimbles, as with a wrench, all the parts will be drawn tightly together with the upper end of the cylinder A in place in the socket G.

ICO

In operation a downward stroke'of the piston, with the valve U on its seat, draws water up through the suction-tube, the passage-Way L, and connected side tube B, lifting the valve S to the stop B, with the Water owing through the opening I into the cylinder in rear of the piston until the piston has reached the end of its stroke. Now upon a return or upward stroke of the piston the said valve S by' gravity seats itself and the valve U is lifted to the stop XV by force of the Water and the latter passes up into the passage-way L ofthe upper casting. When the piston starts on its upward stroke, the valve M will be lifted from its seat, and, the valve S being closed, water will be drawn into the cylinder in rear of the piston until the piston reaches the limit of its stroke. Now upon a downward movement or stroke of the piston the valve M will close and the water contained in the cylinder will be forced through the lower opening I to and up the connected tube B, lifting its valve S against the pressure of Water in the passage-way L. At the same time the valve U being seated suction created in rear of the piston will lift the valve S in operative connection therewith and draw water through the passage-way L of the lower casting, communicating tube B, curved opening I, and into the cylinder in rear of the piston.

With the above construction and arrangement of the end castings, lcylinder, side tubes, and valves it is appareutthat both strokes of the piston force Water into the passage-way L of the upper casting first through one or the other of the valves S U, according to the movement or stroke of the piston, and consequently with a reciprocal motion of the piston a continuous flow of water is forced through the passage-way L and up through the opening E to be delivered as may be desired.

I am aware that double-acting pumps eniploying a cylinder, side tubes, and end castings are not broadly new, and I do not, therefore, desire to claim such as myinvention; but I do think that my special end casting C, taken as a whole-that is, formed with the stops B and other integral features specied-is new and that the special combinations of features pointed out in the claims are also new.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The combination in a double-acting pump employing a cylinder and separate side tubes as shown, of vertically-guided Valves all of which seat by gravity, special end castings having water passage-ways connecting the cylinder and side tubes as shown, and means substantially as specified whereby the end castings cylinder and side tubes may be secured together, the lower end casting having two passage-ways both of which connect the cylinder and one side tube as shown and one of said passages having a gravity-valve op.

erating to close backiiow from the cylinder, the upper end casting having two passageways both of which connect the cylinder and one side tube as shown, the cylinder and side tube communications, in operation, being closed by free and guided gravity-valves 1ocated within the said casting and the said valves` limited in upward play by stops, as shown, integral with the casting and the cylinder-valve sliding on the piston-rod, all constructed arranged and operating substantially as described.

GEORGE E. GREEN.

Witnesses:

E. J. HANNAH, E. C. HUNTER.

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