US769281A - Pump. - Google Patents

Description

693 YPATENTED SEPTKES, 1904.

E. s. STEWART & 0. G. RICE.

" PUMP.

. APPLIOATION FILED MAY 14, 1904.

Fig. 2.

' no MODEL.

Fay.

UNITED STATES Patented September 6, 1904.

PATENT OFFICE. I

ELBERT S. STEWART AND CALVIN G. RICE, OF PRATT, KANSAS; SAID STEWART ASSIGNOR TO SAID RICE.

PUMP.

SPECIFICATION forming part of Letters Patent No. 769,281, dated. September 6, 1904,

Application filed May 14, 1904.

To a whom it may concern:

Be it known that we, ELBERT S. STEWART and CALVIN G. RICE, both citizens of the United States, residing at Pratt, in the county of Pratt and State of Kansas, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

Our invention relates to that class of pumps known as lift-pumps, in which a valved piston reciprocates ina tube or casing, causing the water or other fluid to be raised from a great depth to the surface. In such pumps ordinarily the check-valve is located near the bottom of the tube and the piston, which is normally'located a short distance above the check-valve, is reciprocatedby a rod. The piston is provided with packing-rings, and as after atime these become worn and leaky it is desirable to remove the piston for repairs. It is difficult to accomplish this in such pumps as ordinarily constructed, because while the piston is being elevated-its valveis closed; and there is therefore greatresistance to the upward passage of the piston.

According to our invention we provide devices by means of which the piston-valve may beheld open while the piston is being withdrawn from the tube.

In carrying out our invention we use a tube or casing of ordinary construction and in the lower portion thereof provide an ordinary check-valve. The piston is provided with a valve, preferably-a puppet-valve, which is arranged in a frame or cage, by which it is guided and which as it moves up and down opens and closescommunication between the spaces in the tube above and below-the piston. Normally as the piston descends the valve is opened and water passes to the space above the piston, and when the' piston is raised the valve closes and the water above the piston is raised and discharged at the top of the tube. In order to hold the. pistonvalve open while the piston is being withdrawn from the tube for repairs or for other purposes, we provide, the piston with a rod adapted to support it. This rod is provided with spring-catches, connected with'and supported on a part of the piston. The rod also Serial No. 207,991. (No modem carries at its lower end'a frame which is adapted to move up and, down in the lower portion of. the piston. This frame projects below the piston and in the normal operation of the pump does not interfere in any Way with the action thereof; but when the piston is designedly lowered to a greater extent than usual the frame carrying the valve-supporting rod abuts against the frame of the checkvalve and it is caused .to' rise in the piston and the spring-catches engage the piston when the rod is raised and hold the rod in an elevated position against the piston -valve, which isthen held up in such manner as to open a free communication between thebore of the tube bothabove and below the piston, so that when the piston is raised out of the pump it may move without meeting with the usual resistance caused by the column of water above it. r

In the accompanying drawings, Figure 1 of a lift-pump embodying our; improvements with the parts in their normaloperating position. Fig. 2 is a similar view with the pistonvalve held open and in position 'to be raised out of the pump. I s

The pump casing or tube Amay be made in any suitable way andhas a discharge-spout A. Thecheck-valVe B is of usual construction and may operate in the usual way. The piston is shown as being constructed with an upper frame C, forming a cage forthe pistone valve D. This cage is connected with the valveoperating rod'E, and ithas a tubular guide a for the stem (i. of the puppet-valve D and which is formed with lateral openings 0 to prevent the accumulation of fluid within it. The large lower end of the upper casing 0 is provided with ports 0 to permit water to pass laterally from the inside of the piston to the outside thereof.

To the casing C is attached a sleeve F, flanged at f and having between this flange and the lower flanged end of the casing (J packing: rings G H I. The packing-rings fit thetube or casing A snugly and prevent fluid from passing from one endof the piston to the other around the outside thereof. The sleeve F has attach ed to its lowerflanged end another sleeve, J, which projects downwardly therefrom and is formed with a cross-piece or guide j, through which extends a rod K, that also extends upwardly through a guide L in the sleeve F. To the lower end of the rod K is attached a frame or short cylinder M, having a crosspiece m, through which extend the legs a of the catch N. This catch is rigidly connected with the rod K and extends through openings in the cross-pieces j and m. When the parts are in the position shown in Fig. 1 for the normal operation of the pump, the upper end of the rod K is below the valve-seat D and has no effect thereon. As the piston is reciprocated water is raised and discharged from the pump in the ordinary way. If, however, the piston is forced down to an unusual extent the frame or cylinder M will strike against the casing of the check-valve B and will be caused to rise in the piston and cause the rod K, which is rigidly connected with it, to abut against the pump-valve D and raise it to the position shown in Fig. 2. In doing this the catch N, which is carried by the rod K, is also raised and its shoulders a pass through the crosspiece 1' and rest upon this cross-piece in the manner shown in Fig. 2. The rod K is thus supported in an elevated position and holds the pump-valve D open. If now the piston is raised, no water will be lifted, inasmuch as the pump-valve is held open, and therefore the piston can be easily withdrawn. Before returning the piston to its normal position the catch N should be readjusted so that the parts will assume the position shown in Fig. 1. They will remain in this position as long as desired and until the piston is lowered to an abnormal extent in order to shift the parts to the position shown in Fig. 2.

A pump thus constructed will be found to operate most efliciently, working as usual in ordinary operation and quickly acting to shift the parts to hold the pump-valve permanently open when it is desired to remove the piston for repairs or for other purposes.

We claim as our invention 1. Apump comprising a tube or casing, a check-valve therein,a valved piston, a rod adapted to engage the valve,but held normally out of engagement therewith, a frame projecting from the lower end of the piston to which the rod is attached and which is adapted to move vertically toward and from the piston, and a catch comprising shouldered legs on opposite sides of the rod and carried by the rod and adapted to engage the piston and hold the rod in an elevated position against the pistonvalve, for the purpose specified.

2. The combination of a tube or casing, a check-valve therein, apis'ton having a freelymoving valve, a rod adapted to engage the piston-valve and hold it open but which is normally held out of engagement therewith, a rigid frame to which the rod is connected and which projects below the bottom of the piston, and a spring-catch carried by the rod having legs provided with shoulders for engaging the piston on opposite sides of the rod, and parts extending into the frame by which the catch can be operated, for the purpose specitied.

3. The combination of a tube or casing, a check-valve therein, a piston-valve, a cage or casing within which it is located and by which it is guided, a sleeve detachably connected with this casing and havinga guide within it, packing-rings interposed between the cage and this sleeve, another sleeve or cylinder detachahly connected with said first-mentioned sleeve and having a guide within it, a rod extending through the guides within the sleeves, a frame or casing within the lower sleeve and guided thereby and which is attached to the lower end of said rod, and a spring-catch carried by the rod and adapted to engage the guide in one of said sleeves for the purpose specified.

4. A pump comprising a tube or casing, a

check-valve therein, a piston within the tube above the check-valve comprising a cage, a puppet-valve moving freely therein and normally free to seat itself while the piston is being raised, a rod supported by the piston but normally held out of engagement with the puppet valve, a catch carried by this rod and adapted to engage the piston but which is normally held out of engagement therewith, and

a cylindrical frame guided vertically by the piston and attached to the rod for causing the catch to operate to hold the rod in an elevated position when the piston is lowered to an unusual extent.

5. A pump comprising a tube or casing, a check-valve therein, a valved piston, a cage or casing within which the valve is located and by which it is guided, sleeves attached to this cage and having cross-pieces provided with guides, a rod sliding in said guides, a cylindrical frame attached to the rod and guided by one of the sleeves, and a catch attached to the rod and adapted to engage the cross-pieces in the sleeves to hold the frame in either an elevated or a lowered position, for the purpose specified.

In testimony whereof we have hereunto subscribed our names.

ELBERT S. STEWART. CALVIN Gr. RICE. Witnesses:

SAM. H. SHRAcx, R. F. Onion.

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