US250178A - Migiah walkee - Google Patents

Description

M. WALKER.

(ModeL) PUMP,

N4 PEYERS. Huololilhugmphur. Waslinglolk D4 C.

UNITED STATES PATENT OFFICE.

MIOIAH WALKER, OF PORT HURON, MICHIGAN.

PUMP.

SPECIFICATION forming part of Letters Patent No. 250,178, dated November 29, 1881.

Application filed July 8, 1881. (Motleh) To all whom "it may concern Be it known that I, MIGIAH WALKER, of Port Huron, in the county of St. Clair and State of Michigan, have invented an Improvement in Steam-Pumps, of which the following is a specification.

The nature of this invention relates to certain new and useful improvements in the construction of that class of pumps known as displacement-pumps, for lifting and forcing water; and the invention consists in the peculiar construction and operation of its parts and their combination, as more fully hereinafter set forth.

Figure l is a vertical longitudinal section. Fig. 2 is a vertical cross-section on the line X Xin Fig.1. Fig. 3 is an enlarged and detached perspective view of one of the valve-rin gs. Fig.

vc-is a vertical cross-section of the pump-chamber on the lines 4 4. Fig. 5 is a perspective of one of the flexible valves detached.

1n the accompanying drawings, which form a part of this specification, A represents the shell, provided with beads B, one of which is provided with the stuffing box 0, through which the piston-rod D has its reciprocating motion.

E is the inlet or suction opening, through which the water is admitted into the pumpbarrel, located on one side of the shell, and immediately opposite is another opening, F, communicating with vacuum-chamber G.

H represents the walls of the pump-chamher proper, made in ring-sections, as shown. These sections are secured at their inner ends to a central annular bridge, I, the bore through the same being of the proper size to allow for the free reciprocation of the plunger through it. This annular ring-support is provided with packing a, secured in place by the bolt and flange b. The walls H are made in two ringsections, as shown, one being secured to each side of the bridge by screw-threads or otherwise, so as to form tight joints. The outer ends of these walls H, which form the inlet portion of the piston-chamber, are secured to the internally-projecting annular flanges c and c, which are integral parts of the shell; and the chamber thus formed by the flanges c c and the wall of the shell A forms the inlet waterchamber within the shell, and has communication with the suction-opening E. These rings H are provided around their periphery with inlet-ports ein double rows, and a double valve,

J, secured at its center by means of bolts ff to the abutments between the ports 0, so that two rows of ports are covered, each row by one wing of the valve J, which valves open inwardly at proper times to admit water into the piston-chamber K. In each of the abutments between the inlet-ports care recesses 9, designed to form receptacles for silt or fine sand, which might otherwise collect under the faces of the valves and prevent their successful operation. Secured between the heads B of the shell and the outer ends of the walls H are the rings L, the inner ends of which are provided with flanges h, by means of which they are secured by any convenient devices to the flanges cand 0'. These rings are provided with ports i in double rows, to which are secured valves J, opening outwardly, constructed precisely like valves J, and similarly secured to the valve-rings L. Between these rows of ports 11, and immediately under the center of the valve J, is a recess, g, for a like purpose with that of the recesses g in the'rings H, and as these recesses are opened at their outer ends the sand or silt collected in them is forced out by the rush of the waters. These rings L, together with the rings H and the heads of the shell B, form the pump-chamber proper, and the rings L have communication outwardly through the valves J into the chamber M, between the heads B, the shell A, and the flanges c c and wall 01, which chamber has a free communication with the air-chamber N, near the lower end of which is situated the outlet 0.

P is the piston, formed of the shell k and the heads I, secured to the piston-rod D, with which it has a reciprocating motion from end to end of the chamber K through the bridge I. This piston is made hollow for the purpose of reducin g its specific gravity, which, if the piston were made solid, would soon wear the under side thereof and the adjacent part of the bridge out of true, which would interfere materially with the perfect working of the pump; but as it is well known that a piston constructed as described would, under pressure, gradually become filled with water forced through its walls,

I insert within said piston another closed cylinder, m, of a little smaller diameter, and secure it in such a manner as to leave a small annular space, a, between the walls of the piston and the cylinder, and extending to a corresponding space between one of the heads of the piston and the end of the cylinder. The piston-rod D is provided with a channel, 0, extending to and communicating with this space n, and in the opposite direction outside the stuffing-box C. Now, as under pressure the water is forced through the walls of the pissten, the space n limits the quantity so as not materially to interfere with the specific gravity of the piston, and the small amount of water admitted, not being under pressure after its admission, does not pass through the walls of the internal cylinder, and is readily drawn oil through the orifice in the piston-rod.

In practice, the piston being in the position shown in Fig. 1 and the pump in operation, the water displaced in the chamber K is forced out through the valves J into the chamber M, while the water admitted through the suction or inlet E fills the chamber Q and enters that portion of the chamber K in which the piston is not found, through the valves J, and as the piston travels to the opposite end of the chamher a like action of expulsion and admission takes place at the end of the chamber from which the piston has just passed.

By locating the opening to the vacuum-chamber directly opposite the inlet-opening E a constant flow of water is had without the pulsations usually found in the discharge of water from pumps as ordinarily constructed, for the suction of water into the vacuum'chamber will prevent such pulsations, which always occur at and near the end of the stroke of the piston.

What 1 claim as my invention is- 1. In a pump, the shell A, provided with illlet and outlet pipes and vacuum and airehamher, as described, in combination with the annular support I, the ring-sections H H, the valve-rings L, the rigid flanges c 0, and the piston P, substantially as and for the purpose specified.

2. In a hollow plunger, and in combination therewith, a tight cylinder located within said hollow plunger, leaving a small annular space between it and the walls of the plunger, and a drip through the plunger-rod, all arranged for the purpose of reducing the bulk of the water which may be pressed into the hollow plunger, and allowing it to find its way out through the drip in the piston, substantially as described,

3. In a displacement-pump, and in combination, the chambers K, M,and Q, the latter having an inward communication with the former through ports 0, and the chamber M having an outward communication with the chamber K through ports 0', all of said parts being provided with valves, substantially as set forth.

4. In a pump, a pump-barrel within which the piston has a reciprocating motion, formed of the perforated valve-rin gs H, perforated "alve-rings L, and heads B, the perforations in said rings being provided with valves, which, in the reciprocation of the piston, alternately close and disclose the ports, substantially as and for the purposes specified.

5. In a pump, the ring and valve sections H L, provided with recesses g g, in combination with the valves and ports of said ring and valve sections. substantially as and for the purpose specified.

6. In a pump, the ring and valve sections H L, provided with a circular series of openings, 6 t, recesses g g, and elastic valves J J, each valve being constructed to answer for a series of openings on each side of the recesses g g, substantially as described.

4 MIOIAH WALKER.

Witnesses:

L. ATKINS, WM. H. AVERY.

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