US276134A - Peter t - Google Patents

Description

(No Model.)

P. T. GUFFIELD.

FORGE PUMP.

Patented Apr. 17,1883.

N, PETERS. Phummhographcr, wasningmn. D. c.

lINrrEn STATES PATENT t OFFICE.

PETER T. COFFIELD, OF SPRINGFIELD, OHIO, ASSIGNOR OF ONE-HALF TO CHARLES H. PAXSON, OF SAME PLACE.

FORCE-PUMP.

SPECIFICATIO'Nforming part of Letters Patent No. 276,134, dated April 17, 1883.

Application filed July 6,1882. (No model.) y

To all whom t may concern:

Be it known that I, PETER T. COFEIELD, a citizen ofthe United States, residing at Springiield, inthe county of Clarke and State of Ohio,

have invented certain new and useful Improvements in Force-Pumps, of which the following is a full, clear, and exact description.

My invention relates to that class of forcepumps known as double cylinder forcexo pumps,7 and my object is to simplify the construction, and at the same time render the pump cheaper and more reliable than lothers ofthe same class.

The novelty of my invention consists, first,

in the arrangement of the two piston-cylinders of unequal diameter upon one straight waterdelivery stem or stock, with au airchamber arranged between the two cylinders or at a point above the valve communicating with the 2o lower chamber; secondly, in the construction and arrangement of the ports and valves, whereby a stuffing-box for the pump-rod is dispensed with; thirdly, in the combination, with the discharge-tube or pump-stock, of an inclosed tube extending from the top of said stock down through the same into the upper piston-cylinder; fourthly, in the combination, with the pum p-stock and upper piston-cylinder, of a water-passage extending from the lower 3o end of said cylinder up into said stock; lifthly, in details of construction and combination of the parts, all as will be herewith set forth and specifically claimed.

In the accompanying drawings, Figure l is 3 5 a side elevation of my improved pump. Fig. 2 is an enlarged rear elevation in section ofthe operating parts and their connections. Figs. 3 and I are central sectional side elevations of the upper piston-cylinder and connections.

Fig. 5 is a detail view of a modification in the arrangement of the cylinders and air-chamber.

Figs. 6 and 7 are modifications of the double cylinder for shallow wells.

The Same letters refer to like parts in all th I figures.

cured upon the well-platform E, so that it can be raised or lowered to suit the height of the water in the well in the following manner: A collar, F, Fig. 1, is fitted upon the stock A and 53 secuied to the platform by bolts or screws. The stock A, passing through this collar, isheld by set-screws or bolts c, extending through the collar and bearing against the stock. By loosening these screws the stock, with the 6o pum p-cylinders and attachments,cnn be raised or lowered, and can be then reclamped in the adjusted position. f

G is the upper and smaller pump-cylinder, having a ange at its upper end, by which it is bolted to a flanged head-piece, Il, which is screwed upon or secured to the lower end ot' the stock A, as shown. Opening from the lower end of the cylinder G is a passage-way 0r outlet, I, which extends up alongside the 7o cylinder and opens into the head H. The opening in the head H communicates with the bore of the stock A. Now, passing centrally down through the head B and the stock A is a small tube or pipe, J, which is open at both ends, but is secured with watcr-tightjoints at the top tothe head B by the nut b, and at the bottom by being screwed into the head of the cylinder G. Through this tube J the pumprod K passes from the operating-handle down 8o into the cylinder G, and carries the piston L, which works in the cylinder G. I

Extending centrally from the bottom ofthe cylinder G is the pipe M, carrying at its bottom the larger pump-cylinder N, intowho'se 85 top it is secured. This lower cylinder is of about double the capacity of the upper cylinder, and it is provided at its bottom with any suitable upwardly-opening valve, O, and with a strainer, P, of such construction as to prevent foreign objects being drawn into the cylinder. It isintended, of course, that this lower cylinder shall be submerged in the water of the well. The pump-rod K is extended from the piston L, and passes down through the pipe M into the cylinder N, and carries the perforated piston R of said cylinder. The piston R is provided with the usual or any suitable dropvalve, S. The pipe M carries at or about its middle a laterally-extending hollow coupling, 1GO T, Fig. 2, .into which the air-chamber U is secured. This air-chamber is a straight pipe,

closed at its upper end and lying close to and parallel with the cylinder G, as shown. By means of the hollow coupling T it has free communication with the pipe M, and consequently with both cylinders. At the upper end of the cylinder G one or more small apertures, c, Figs. 2 and 3, are provided to allow the escape of any water which might by accident or leakage get above the piston L. `It will be readily seen from the above-described construction that a continuous even flow of water is kept up on both the up and down strokes of the pump-rod, owing to the fact that the lower cylinder is of double the capacity of the upper cylinder and the interposition between the two cylinders of the air-chamber.

0n the downstroke of -the pump-rod the piston L forces the water out of the cylinder G through the passage I, and up through the stock A around the pipe J; and on the upstroke the piston R forces up enough water to illthe cylinder G and keep up the pressure through the passage I, owing to the fact that it forces up twice as much water as could be contained in the cylinder G. By means of this arrangement of the cylinders, and by forcing the water ont of the cylinder G at its lower end, and by the employment of the tube J, I am enabled to entirely dispense with a stungbox for the pump-rod, since no water can get above the piston L when said piston tits the cylinderproperly. It'desired,themodification shown in Fig. 5 may be employed, where I have dispensed with the intermediate pipe, M, and have directly united the two pumping-cylinders,and have placed the air-chamber elbow below'the lower cylinder but above the inletvalve. By this modication the same mode ot' operation and result are obtained. In Figs. 5 and 7 is shown a modification of the double cylinder, to be used in shallow wells as a suc-l tion-pumpinstead of a lifting-pump. The upper smaller cylinder is secured into the chamber and extends downward into the larger cylinder. The water passes around the smaller cylinder through the chamber into the discharge-pipe. l

Having thus fully described my invention, what I claim is- 1. In combination with a force-pump, a tube connecting the head ofthe pump to the upper cylinder, passing centrally through the waterdelivery stock of the pump, and being open at both ends for the purpose of passing the rod through it, and at the same time cutting o' communication of the water with the pumprod, substantially as described.

A. tubo passing centrally through the water-delivery pum p-stock, in combination with a cylinder having a passage or branch conducting the water from below the piston L into a chamber above the same, having an outlet into the stock ot the p^nmp,`substantially as described.

3. In a double-acting force-pump, thecombination, with the delivery-pump stock having a central tube for the passage of the pumprod, of two pumping-cylinders concen tric with said pump-stock, the lower one of which is ot' larger diameter than the other, and with thc discharge-passage extending from the lower end of' the upper cylinder up into the concentric pump-stock, substantially as and for the purpose specified.

4. In a double-acting force-pump, the combination, with the water-delivery stock having a central tube containing the pump-rod, of two pumpingcylinders concentric with tho pumpstock, the lower one of which is of larger diameter than the upper, and the upper one ot' which has its discharge-passage opening from its lower end into the pump-stock, and an airchamber communicating with said cylinders at a point above the lowerl inlet-valve, substantially as and for the purpose specified.

5. In a double-acting force-pump such as described, the upper cylinder, G, having an outlet-passage, I, extending from its lower end and up into the concentric waterdelivery pump-stock, substantially as described.

6. In a double-acting force-pump, the concentric arrangement ot' the waterdelivery pump-stock, the two pumping-cylinders, the pump-rod confining-tube, and the pump-rod, substantially in the manner and for the purpose specified. Y

PETER T. COFFIELD. Witnesses:

GUs A. MEYER, J ERE. F. TwoHIG.

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