US155669A - Improvement in valves - Google Patents

Description

w. PAINTER.

Valves.

No.155,669. Patented oct.6,1874.

UNITED STATEs PATENT OEEIoE WILLIAM PAINTER, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN VALVES.

Specification forming part f Letters Patent No. 155,669,dated October 6, 1874; application tiled september 19, 1874.

CASE C.

To all whom it may concern:

Be it known that I, WILLIAM PAINTER, of the city and county of Baltimore, in the State of Maryland, have invented 'certain new and useful Improvements in Valves.

My said improvements relate to that class of valves which have their seats in a plane at right angles to the axial line of the valve-port and surrounding. the valve-opening. The object of my present invention is to produce a valve of this general character practically adapted for use in connection with pumps and other apparatus for transferring the contents of privy-vaults, cess-pools, &c., to tanks for transit.

It has been demonstrated that valve-ports of considerable area of opening are requisite for this purpose in order to` allow of the free passage of more or less solid extraneous matter, and at the samev time it is essential that the valves be of suflicient iiexibility to effect a com plete closure regardless of the temporary presence of solid extraneous matter liable to be retained in the valve when it closes.

My invention consists in constructing the iiexible disk withV its central portion radially stitfened, so that it will be rigid for resisting 'back pressure, but be capable of being readily lifted and of sufficient flexibility to adapt itself to solid matter passing through the valve or temporarily :retained therein, and in constructing the portion of the disk which surrounds the stiffened central portion wholly iiexible, in order that it may effect a practically operative closure, whether the valve contain extraneous solid matter or not; and I do hereby declare that the following specification, taken in connection with the drawings furnished and forining a part of the same, is a clear and accurate description of my invention and of the valves embodying the same.

Referring to the drawings, Figures l and 2 represent one of my valves in section and in perspective. Figs. 3 and 4 represent modifications thereof in section.

vIn Figs. l and 2, A denotes the valve-port. In this instance the valve has no-solid seat, owin g to its peculiar construction. a It is composed of two members, the lower one, B, and the upper, C. Both are in the form of concave elastic rubber disks with flat edges or rims, as at a, and they are placed one above the other with their concavities coincident. The lower disk B is secured to the neck of the valve-port bya collar, a iiange, and bolts, or by any other suitable means. l The upper disk C is held in position by a standard, as at b, which is secured to a cross-bar in the valve-port. Each disk is provided with the radial stiffeners or braces d, which in the upper one extend downward and outward from the standard cap e, on which their ends rest, to the inner edge of the flat rim a. Those on the lower disk extend outward and upward in the same manner, and the outer ends of each upper and lower brace are coincident, so that `pressure on the braces from above is borne by the standard cap and the outer ends of the lower braces. At all points at the periphery of the concaved portion the valve is free to rise, and is, in fact7 radially flexible, readily lifted, but rigid in resistance tov back pressure. The rims a are wholly iiexible, and it is by contact of their iiat coincident faces that they readily embrace any solid extraneous matter liable to be temporarily deposited between them at the moment of closure. In constructing this valve the rubber vdisks may be vulcanized in molds to give the requisite form, and the braces (l may be either embedded in the rubber at the time of molding or subsequently riveted thereto. It is obvious that the stii'eners, when riveted to the disks,

should be duplicated with one on each surface of the disk, so that the rivets may be headed on each, and so confinel the rubber securely between them. The angle of the sides of the braced portion of the disk may be largely varied, and both need not be at the same angle so long as the outer ends of the braces in the upper disk bear upon the outer ends of those on the lower one.

In Fig. 3 a valve is shown in which but one disk is employed, that being a counterpart of the disk O, already described. A large port or opening is shown with an annular flat seat, as

at f, on which the lower surface of the rim engages with valve-contact. The braces or stifi'eners d have bearing at their inner ends upon the central cap and slightly overlie the seat adjacent to the edge of the valveopening. The seat f may be clad with sheet rubber of the same character as that employed inthe disk, but good results will be attained on a more solid surface, presenting a good general bearing.

In Fig. 4 a valve is shown which embodies my invention in its simplest form. It is provided with a solid seat, as in Fig. 3, and a flat disk of rubber instead of a concave disk. It is secured centrally to a standard, as in the previously-described valves, and has the radial braces or sti'eners Which extend from the central cap to a point slightly overlying the seat. As in the case of the concave disks, the braced central portion is rigid. as against back pressure, free to be lifted, and exible at its junction with the outer, unbraced, and Wholly llexible portion, and, like them, should sticks or other similar matter be temporarily retained in the valve at the moment of closure, it will nevertheless admit of the proper closure of the valve at all other points, and by reason of the flexibility of the rim and the central or braced portion at its junction with the rim to so close around the obstacle as to form a practically tight joint, which would :not admit of the return ci any considerable portion of the Solid or uid matter already passed through the valve. v

The valves shown all embody my invention in having a disk constructed practically in two sections-viz., an interior section, which is radially braced or stiiiened, but flexible at its periphery, and an exterior section, which is Wholly iexible. In each of them the central. section guards the valve-port by resisting back pressure, and prevents the return of solid mat'- ter, and the outer section or rim, by its exten-- sive bearing-surface, prevents the return of the fluid matter.

. I do not herein claim, broadly, the combination of stiieners or braces with a flexible flapvalve, as they are shown and claimed in that combination in Letters Patent granted to me August 5, 1873, No. 141,587.

Having thus described myinvention, I claim as new, to be secured by these Letters Patent- A exible circular valve, mounted on a central standard, and composed of an interior circular flexible section, which is radially stifened by braces, and of a lexible :dat annular section or rim surrounding the stiffened section, substantially as described.

WILLIAM PAINTER. Witnesses:

WM. G. Woon, P. F. LARNER.

Images