US338609A - Valve-seat - Google Patents

Description

(No Model.)

D. J. NYSEWANDEE.

VALVE SEAT.

No. 338,609. Patented Mar. 23. 1886.

l l I .dttorneyy;

UNITED STATES PATENT OFFICE.

DAVID J. NYSEWVANDER, OF NElV OARLISLE, OHIO.

VALVE-SEAT.

EJPEGIEJIQATIQN forming part of Letters Patent No. 338,609, dated March 23, 1886.

Application filed July 22, 1885. Serial No.1'72, 313. (No model.)

To all whom it may concern.-

Be it known that I, DAVID J. NYSEW'ANDER, a citizen of the United States, and a resident of New Oarlisle, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Valve-Seats; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention has for its object the production of an elasticvalve-seat especially designed to be used in lift-pumps, which shall possess advantages in the points of simplicity, durability, and general efficiency; and to these ends my invention consists in the improved construction, arrangement, and combination of parts, which will be hereinafter fully described, and pointed out in the claims.

Referring to the annexed drawings, Figure 1 is a vertical sectional view of the lower end of a lifiJ-pump cylinder with its cap in which my invention is embodied, and Figs. 2, 8, and 4 are similar views showing modifications of my invention which it may be desirable to employ under certain circumstances in place of the peculiar construction shown in Fig. 1.

The same letters of reference indicate corresponding parts in all the figures.

Referring to the several parts by letter, A represents the cylinder of the pump, the lower portion of which only is shown, the lower extremity of the said cylinder being provided with the usual external screw-thread, a, to adapt the cap B to be secured thereon in its operative position; or the cap and cylindermay have suitable flanges to adapt them to be bolted together.

B represents the cap,which is provided with the usual central vertical opening or inlet-port, B, and is further east with the upwardly-extending annular flange B encircling the upper end of the said central vertical opening, as shown, for the purpose which will be hereinafter set forth.

0 indicates an annular rubber cushion, of a suflicientdegree of softness, which forms the valve seat, the said rubber cushion resting upon the flat upper surface of the cap B, with the central upwardly-extending flange, B extending up within the central aperture of the said cushion for a sufficient height, thereby serving to hold the said cushion in its operative position, and more particularly to prevent its inner circular edge, I), from being forced over or beyond the edges of the central aperture or inlet-port, B, when the cap 13 is screwed up tightly upon the lower end of the cylinder A, for the purpose of securing the valve D and the valve-seat securely in position. The annular rubber cushion C is provided at a point sufficiently near its central aperture with the annular groove C,which forms the usual sandchamber.

D represents the valve, which is of ordinary construction. lhis valve may, if desired, be placed immediatcl y upon the rubber cushion G, and secured in its operative position by screwing the cap B up upon the screw-threaded lower end of the cylinder A until the lower circular edge of the said cylinder bears firmly upon the flange of the leather valve, thereby securing the same tightly upon the rubber cushion, and also holding the cushion itself firmly in position. It will be seen that by this arrangement, if the valve or cushion becomes loosened from any cause, they may be readily tightened in their operative positions by screwing the cap B a little farther up upon the end of the cylinder, so as to cause the lower end of the cylinder A to bear more firmly down upon the valve and cushion,as will be readily understood.

An annular metallic plate, E, of brass, copper,or other suitable metahmay be placed upon the upper side of the rubber cushion, if desired, between the said cushion and the-valve, the central opening of the said plate being considerably larger than the central aperture of the rubber cushion, so that the inner circular edge of the said plate rests within the annular groove 0 of the cushion, as shown, so as to leave the seat 0, formed by the inner portion of the cushion, free for the reception of the valve proper.

The circular annular rubber cushion O is made of such a diameter that when placed in operative position in the cap B its outer circular edge will extend beneath the lower edge of the cylinder A, as shown in the drawings, so that when the cap B has been screwed up tightly upon the lower screw-threaded end of the said cylinder the pressure of the lower edge of the said cylinder will render it impossible for the valve D, under the pressure of the water on each downstroke of the pumppiston, to force the seat (3 of the said rubber cushion down or outward away from the central flange, B ,-unti1 the valve would come in contact with the upper end of the metal flange B, which would be liable to occur if a rubber ring merely surrounding the flange 13 without extending beneath the lower end or edge of the cylinder A were employed in place of my improved rubber cushion hereinshown and described. The metallic annular plateE also serves, when the cap B has been screwed up tightly upon the end of the cylinder A, to exert an even pressure upon the main portion of the upper side of the rubber cushion G, and thereby force the inner circular edge of the said cushioninto firmer contact with the flange B, thereby facilitating the before-mentioned object and holding the cushion firmly in its operative position.

The upwardly-extending central flange, B which is cast integral with the cap B, may be entirely dispensed with, if desired, as shown in Fig. 2 of the drawings, by making the cushion of vulcanized rubber of a sufficient degree of hardness to prevent its inner edge from being forced over so as to partly obstruct the upper end of the inlet-port B, the cushion in this case being also made of such a diameter that its outer circular edge will extend beneath the lower edge of the cylinder A, as shown; or the cap may be cast with an inwardlycurved flange, F, and an annular recess, F, in its upper face, as shown in Fig. 3 of the drawings, so as to leave the annular shoulder F", between which and the curved flange F the lower portion of the rubber cushion is tightly wedged, the cushion being in this case cut away at its rear lower portion annularly at G, this arrangement effecting a considerable saving in material, as will be readily seen. The cap may also be constructed with the two concentric annular grooves H and H, leaving the annular bead or projection H over which the inner portion of the cushion I, which in this case may be of leather, extends, a metallic thimble, J, having the flange J at its upper end, being screwed down within the upper end of the inlet-port of the cap, so as to firmly secure the inner annular edge of the leathercushion I, while an annular metallic plate, K, .is placed between the valve and the said cushion in the position shown, so as to leave that portion of the leather which passes'over the,

I annular bead H clear for the reception of the the construction of my invention will be readily understood without requiring further ex-' planation. It will be seen that the valve comes in direct contact with the annular rubber valve-seat, and that therefore the corrosion which infallibly ensues when a leather valve is brought in contact with metal of any kind is entirely avoided, while by' constructing the rubber cushion on which the valveseat isformed of such a diameter that its outer circular edge will extend beneath the lower edge of the cylinder A the rubber valve-seat is held firmly in its operative position when the cap B is screwed up tightly upon the lower end of the said cylinder, as

before described.

The upwardly projecting annular flange prevents the sand from working under the rubber cushion, which it would otherwise be liable to do.

The cap may be tightened'upon the lower end of the, cylinder to take up wear at any time.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is v 1. The combination, with the cap formed with the central upwardly-extending annular flange, of the annular -rubber cushion forming an elastic valve-seat, and constructed ofsuch a diameter that-when placed in operative position within the said cap its outer circular edge will extend beneath the lower edge of the pump-cylinder, upon the lower end ofwhich the said cap is adjustably secured, as and for the purpose set forth.

2. The combination of the cap formed with the central upwardly extending annular flange, the annular rubber cushion forming an elastic "alve-seat, and constructed of such a diameter that when placed in operative po-' sition within the said cap its outer circular edge will extend beneath the lower edge of thepump-cylinder upon the lower end of which the said cap isadjustably secured and the valve arranged above the said cushion, as described.

3. The combination, with the cap having its upper end provided with the interior screw-thread to adapt it to be secured adjustably upon the lower end of the pump-cylinder, and formed with the central upwardlyextending'annular flange, of the annular rubber cushion forming an elastic valve-seat,

and constructed of such a diameter that when placed in operative position within the said cap its outer circular edge will extend beneath the lower edge of the pump-cylinder, upon the lower end of which the said cap is adjustably secured, substantially as and for the purpose shown and described.

edge will extend beneath the lower edge of the pump-cylinder, upon the lower end of which the said cap is adj ustably secured, and

the annular metallic plate arranged, as described, above the said cushion.

5. The combination, with the cap having its upper end provided with an interior screwthread to adapt it to be secured adjustably upon the lower end of the pump-cylinder, and formed with the central upwardly-extending annular flange, of the annular rubber cushion forming an elastic valve-seat, and constructed of such a diameter that when placed in operative position within the said cap its outer circular edge will extend beneath the lower edge of the pump-cylinder, upon the lower

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