US378848A - Joseph m - Google Patents

Description

Patented Feb. 28, 1888.

' J. M. NRMAND.

(.)OMBINED'PUIVIP PISTON AND ACHECK VALVE. 1v-0.878848.

(No Model.)

WITWE'S'ISES '.dttorney.

NrTnD STATES PATENT Orricn..

JOSEPH' M. NORMAND, OF SPRINGFIELD, OHIO, ASSIGNOR OF ONE-HALF TO JACOB K. MOWER, OF SAME PLACE.

COMBINED PUMP-PISTON AND CHECK-VALVE.

SPECIFICATION forming part of Letters Patent No. 378.848, dated February 28, 1888.

(No model.)

panying drawings.

This Ainvention relates to improvements in a combined pump-piston and check-valve; and the improvements consist, first, of a pistonl rod proper whose lower end is hollow or of tubular form and constructed with an interior shoulder, and supplied at its lower end with a piston head and plunger, and of a checkvalve adapted to tit snugly in its seat, as in the lower end of the pump-cylinder, so as to maintain its position byfrictional contact with the seat, and having a' stem which extends up ward and within the hollow rod a sufficient distance, and which fits sufficiently loose to allow said rod to move freely up and down while pumping, and provided with an enlargement which engages the interior shoulder, whereby the check-valve may be lifted out of the pump for repairs or renewal by simply withdrawing the piston with sufficient force to overcome the frictionalcontact between the valve and its seat. v

The invention further consists in constructing the piston or plunger and valve (for both 'are preferably of the same form) with a metallic skeleton annular frame having an eye'4 which tits over the rod erstem, ahub depending from the lower face around said eye, and an annular head depending from said face near ,the outer edge thereof, and with an associate seat having a screw-threaded eye which screws upon the rod or stem, and the upper part of which eye :is enlarged to receive the said hub, and also having an annular upwardly-projecting bead, which extends somewhat into the receding face and is within the bead on the frame, the hub and eye in which it fits keeping the frame and seat concentric one with the other and without regard to the t of the frame on the rod or stern, the hole therein for the rod or stem being cast large enough to allow the frame to be easily slipped thereon without being bored or finished, and hence too large to keep the frame from slipping from side to side and loosening the grip upon the packing, and the beads holding the packing and turning its inner edge somewhat upward and into thesaid receding face.

In the accompanying drawings, forming a part of this specification, and on which like reference letters indicate corresponding parts, Figure l represents a vertical sectional view 6o of a pump-cylinder and an elevation of. the piston or plunger and the valve and its stem; Fig. 2, a vertical sectional view of the piston or plunger and a portion of its rod and an elevation of the valve-stem; Fig. 3, an inverted plan view of the skeleton frame alone; Fig. 4,

a plan View of the skeleton frame and disk, the latter being under the former; Fig. 5, a sectional View of the skeleton seat alone, and

Fig. 6 a plan view thereof. 7o

The letter A designates a pump-cylinder, of any approved construction, having the usual lower cap and lift or suction pipe, B, into which cylinder the valve is seated and the piston or plunger is fitted to work.

The letter C refers to the piston-rod, the lower portion whereof, at least, is of tubular form and of two diameters-one to allow the enlarged end D of the valve-stein to stand within the piston-rod whileit is moved up and 8o down, and the other to receive the body of the stem, as shown. The lower end of the pistonrod is supplied with a piston or plunger, which acts within the cylinder to suck or lift the water in the usual way, and there may, of course, be the usual-upper piston or plunger in cases of double-acting pumps, as su ggested by the dot-ted lines in Fig. 1. The lower end ofthe stem is also connected with a checkvalve that lits snugly and firmly in the seat 9o therefor, as in the cylinder shown, in which the valves periphery impinges so snugly against the walls thereof as to frictionally maintain the valve in its place. As already suggested, it will be seen that the piston and its rod may be freely operated without disturbing the valve; yet, 'when it is desired to 4remove the valve for repairs or substitution by a new one, it may readily be done by simply withdrawing the piston-rod, the shoulder roo within it engaging the larger end of the stern and lifting and conducting the valve out of the pump. In replacing the valve it is only necessary to follow it with the rod and piston and to tap itwith the lower part of the piston till it is properly down in its seat.

Referring,now,to the particular form of piston and valve illustrated in the present instance, and by preference, though not necessarily, used, and which are alike, the letter E refers to the threads on the rod and stem, on which nuts F, forming shoulders, are screwed. The shoulders, however, may be stationary, if desired. Below the shoulders are placed ilexible disks G, ofleather or other material,forming iaps, to cut ofic the downfiow of water, and beneath these disks metallic skeleton frames H are placed over the rod and stein. These frames are of annular form, and have eyes J, which receive the rod and stein, (presently to to be deseribed,) and around which depend hubs J', adapted to enter eyes in the seats. They also have a number of water-passages, K, divided by spokes L. The lower faces of the frames are provided with annular ledges or beads having receding faces N, into which project the upwardly-extend ing ann nlar ledges or beads O of the skeleton seats l?. These seats have screw-threaded eyes, which screw `on the rod and stem, and whose upper parts are enlarged to receive the hubs J', by which the frames and seats are kept from moving to one side of each other to prevent the packing from vcoming loose. They are also provided with a number of waterpassagesQ, divided by spokes It, similar to or like those of the frames H, save that the spokes It are preferably formed with recesses or depressions S, which serve to preserve thc proper size of the water-passages in case the spokes of the respective frames and seats do not happen to come one under the other, as suggested by the dotted lines in Fig. 4, the recesses allowing more water to pass round their spokes, by reducing the size of the spokes, than if the recesses were filled in, thus making the size of the passages, even when smallest, as in Fig. 4, still amplylarge enough for the full capacity of the pump. As seen in Fig. 2, the leather or rubber or other cupshaped packing T is formed with an inwardlyturned liauge, U, which lits between the annular bead M of the frame and the annular bead of the seat, the latter impinging the inner edge of the flange and forcing it around the bead M and somewhat up into the receding face N of the frame H, thereby securely holding thc packing. The eyes ot' the seats are threaded and fit-the threads of the rod and stem, as already observed, and thereby enable them to secure the parts without use of nuts for this purpose, the latter merely acting as jam-nuts rather than as holding-nuts. Thisisan advantage in practice, because if the nuts are screwed ou tightly enough to prevent working off and loss (which requires the parts to be removed from the pump-cylinder, and often proves quite troublesome, as when they slip entirely from the rod and stem) the pressure injures and cuts through the disks G. The above coustruction avoids these annoyances.

The letter V refers to the jam-nuts.

Again, in manufacturing the device the eyes in the frames are cast sufficiently larger than the rod or stem to allow the same to be easily and quickly placed over the rod or stem, but this, while cheapening the article, renders the eye so large that the frame will constantly work from side to side and loosen the hold on the packing and in a short time necessitate withdrawing and repairing the device. v 3y means, however, ofthe depending hubs J and the enlarged endof the eyes inthe seats, both of which are preferably tapering, the frames are effectually held in place and the working loose of the packing entirely avoided, as I have eertained by constant and severe use.

This piston or plunger and cheek-valve (for the device is the same in both instances, the function and position merely eausinga change iu the name) I have found very effective in use, is easily and quickly pnt together, and the parts subjected to wear readily removed and renewed.

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

The combination, with the rod or stem, of the exterior shoulder, the fixed disk thereon below the shoulder, the annular' frame on the rod or stem and next to the disk and having waterpassages, an annular downwardly-extending bead on the said frame anda depending hub, an annular skeleton seat having a screw-threaded eye screwed on the rod or stem and enlarged in the upper part to receive said hub and having water-passages and an upwardly-projecting bead which extends within said downwardly-extendingbead,a cup-shaped packing having an inwardly-extending ange lying between the bead of the frame and the seat and turned upwardly by the body ot' the seat, and ajam-nut.

In testimony whereof I affix my signature in presence of two witnesses.

JOSEPH M. NORMAND.

Vitnesses:

WlLnna CoLvIN, A. A. YEMMAN.

ICO

Images