US1265153A - Valve. - Google Patents

Description

P. WINSOR.

VALVE.

APPLICATION FILED AUGJ. ms.

Patented Ihy 7,1918.

172 ventor A Z'Zarnqy for its object to provide a light weight, in-.

PAUL wmson, or wns'ron, massacnusnr'rs.

VALVE.

Specification of Letters Patent.

Patented May 7, 1918.

Application filed August 1, 1916. Serial No. 112,594.

To all whom it may concern:

Be it known that I, PAUL WINSOR, a citizen of the United States, and a resident of Weston, in the county, of Middlesex and State of Massachusetts, have invented an Improvement in Valves, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to a valve and has expensive and highly eflicient valve, which is bodily movable and capable of contracting and expanding and coiiperates with its seat to be normally held in operative relation therewith by the spring action of the valve itself, and without the necessity of employing othermechanical means or devices for retaining it in its closed position or for imparting to it a spring action.

To this end, the valve is made curved in form and of suitable material, preferably steel or phosphor bronze, and said valve cooperates with a curved seat, with which it is normally held substantially in engagement by the resiliency of the valve itself. The curved valve is made of a circumferential length greater than a semicircle and may be made of any desired or axial length within limits, and is capable of cotiperating either externally or internally with acasin or shellof minimum size and provided with a port area of maximum amount, which enables the improved valve to be substituted in the heads of compressors and other pumps now on the market for the usual puppet valves therein, with an increase in efliciency in said pumps or compressors and without the necessity of changing said heads.

These and other features of this invention will be pointed out in the claims at the end of this specification.

Figure 1 is a vertical central section of a suflicient portion of a cylinder provided with valves embodying this invention.

Fig. 2, a section on the line 22, Fig. 1, showing a portion of the cylinder and valves, the inlet valve being shown closed and the outlet valve open.

Figs. 3 and 4, enlarged sections of the valves and their shells or casings shown in Fig. 1, the section being taken on the line 22, Fig. 1, and the inlet valve being open and the outlet valve closed, and

Fig. 5, a detail of one of the valves removed.

Referring to the drawing, a represents the cylinder and b the piston of a pump of any known or usual construction, andv in the present instance the cylinder a has detachably secured to it a cap or head 0, which cooperates with a partition. wall 0? extended from the cylinder head e to form chambers f, g, which contain valves 71., z, embodyin this invention. The chamber f is provide with an inlet pipe 10 and the chamber 9 with an outlet pipe 12 in the removable head or cap a. The chamber f is designed to communicate with the cylinder a through the valve h, and the chamber 9 through the valve z. The valve 1: is provided with a valve proper, which in accordance with this invention is made curved in form and of suitable material, such as steel or phosphor bronze, the said valve also being made thin and light and capable of expanding and contracting and of being moved bodily, and in the present instance the valve proper is made as a split ring 12 (see Fig. 5), which is located within a casing or shell, which is preferably made as herein shown and consists of a cylinder 14 provided at its opposite ends with heads 15, 16, and in its body portion with a plurality of openings or ports 17, with which the valve 12 cooperates to close and open the same.

The head 16 of the valve cylinder or casing 14 is detachably secured to the head e of the piston cylinder a, as by screw-threads 18, and is provided with a port 19 which connects the interior of the valve casing with the cylinder a.

In the. resent instance, the cylindricalbody 14 of the valve casing is provided on its interior with annular flan es o'r ribs 20, 21, at the top and bottom 0 the ports 17 in said casing, and said annular flanges are in the same circle as the inner surface of one section or web of the casing 14, marked 22, which separates two adjacent ports 17, while the other sections or webs of the casare -marked 23 are thinner and have their inner surfaces in a different circle from that in which the flanges 20, 21, are located, for a purpose as will be described.

The thicker web 22 cooperates with the annular flanges 20, 21, to form a seat for .the curved valve 12, which has its free ends located on opposite sides of a pin or jection 24 extended radially inward rom substantially the center of the thicker'web 22, and said pin or projection acts as a stop or centering device to limit bodily movement of the valve annularly, and thereby prevent displacement of the valve annularly with relation to the ports 17.

Provision is also made for limiting axial movement of the valve in opposite directions, and to this end, lugs 01' projections 25, 26, are arranged at the opposite ends of the casing 14 so as to be above and below the valve 12, as clearly shown in Fig. 1.

The lugs 25 located at one end of the cylindrical casing 14 are separated from the lugs 26 located at the opposite end of the casing 14 by a distance, which is slightly greater than the axial length of the valve 12, but not sufliciently great to permit axial movement, which would enable the ports to be uncovered by such axial movement.

The valve 12 when located within the casing 14 is normally expanded by the spring action of the valve itself and makes a substantially tight fit with its seat; that is, its ends engage the web 22 and its body portion the flanges 20, 21, with the result that the ports 17 are closed. Thiscondition is represented in Figs. 1 and 2. When the valve 12 is contracted, its ends are moved away from the web 22 and its body portion away from the flanges 20, 21, which opens the ports 17 and a free passage is afforded through the space 30 (see Fig. '3), between the valve 12 and the web 22 and flanges 20, 21.

The valve thus described, may be termed an internal valve, which is represented by the valve 71. in Fig. 1, but it is not desired to limit the invention in this respect, as the invention may, equally as well, be embodied in an external valve, which is represented by the valve 2' in Fig. 1.

In this latter case, the valve 12 is located on the outside of the valve casing 14, the flanges 20, 21, are likewise located, as is the stop pin 24 and axial stops 25, 26, and the webs 23 are located within the circle of the flanges 20,21, and the exterior surface of the thicker web 22, all as clearly shown by the valve 2' in Figs. 1, 2 and 4. In the case of the external valve, the valve proper 12 is seated by its contraction as shown in Fig. 4, and opened by its expansion.

In Fig. 1, the valve 7:. may be considered the inlet valve and the valve 71 the outlet shown in Fig. 1, the valves k, z are shown in the condition they would be in, with the, piston 6 making its discharge or upward stroke in the direction indicated by the arrow 40. In this case, the valve proper 12 of the inlet valve h, is closed by the expansion of the valve itself assisted by pressure of the fluid being forced out of the cylinder a by the piston b, and the valve proper 12 of the outlet valve '2' is opened, being expanded by the pressure of the fluid acting on the inner side of said valve.

On the downstroke of the piston in the direction opposite to that indicated by the arrow 40, the valve proper 12 of the inlet valve is opened, being contracted by the pressure in the chamber f assisted by the suction in the cylinder a, and the valve proper 12 of the outlet valve 2' is closed by the contraction of the valve itself assisted by the pressure in the chamber 9 and suction in the cylinder a.

It will be observed, that the expansible and contractible valve 12 is held in its closed position by one of these inherent properties of the valve itself, which one is used depending upon whether the valve is used internally or externally. 7

Furthermore, it will be noticed that the valve itself is placed in operative relation to its seat by one of these inherent properties without the aid of extraneous mechanical means.

So also, it will be noticed that the valve proper is free to move bodily in its opening and closing movements and is not restrained in order to render it operative, but is what may be termed a full floating valve, which relies upon its inherent spring action for its operation.

While it may be preferred to make the valve proper as a split cylinder as herein represented, it is not desired to limit the invention in this respect, as the valve may be made of a circumferential length greater than a semi-circle, or in other words, of suflicient length circumferentially to enable it to operate by its inherent contraction and expansion.

Furthermore, it is not desired to limit the invention to an expansible and contractible valve of true circular shape, as it may be made of other curved shapes.

Inasmuch as the valve proper is held to its seat by its inherent expansion or contraction, it is capable of being used in a vertical position as herein shown or in any other position.

I have herein described the valve as especially adapted for use with pumps or compressors, but it is not desired-to limit the invention in this respect.

When the valve proper is located within its casing or shell, it may e placed within the same by COIItI'aCtiIIgQ-Q t sufiiciently to allow it to be passed throi llgh the port 19 or either head of the casing may be made removable.

It is preferred tofuiia'ke the webs 23 thinner than the web 2Q, so as to practically enlarge the ports 17, so that a maximum quantity of fluid may pass into or out of the valve casing when-the valve 12 is opened.

The valve proper 12 may be made from a thin metal strip, which'enables the valve to be made light and inexpensive and to be operated by a very light pressure. F urthermore the valve 12 is bodily movable and not restrained. and as a result a freer and a fuller opening of the valve is obtained, which is self-cleaning and capable of being used in a valve casing of minimum size.

Claims:

1. In a valve, in combination, a cal casing closed at one end and open at its opposite end and provided in its body portion with ports separated by webs, flanges on said bodyportion cooperating with said ports to form valve seats, one of said webs havin one surface in the same curve as the said anges to form part of the valve seats, an expansible and contractible split '0 linder cooperating with said seats and forming the valve vproper to control the opening and closing, of said ports and bodily movable cir- 'cumferentially and axially with. relation to said seats, and means for limiting circumferential and axial movements of said valve with relation to said ports.

2. In a valve, 'in combination, a curved valve seat, a curved valve bodily movable and capable of contracting and expanding and normally held in operative relation to metal strip of alength greater than a semicircle and free to move bodily and capable v of expanding and contracting and cooperatcylindriing with said valve seat to be held thereto by the spring action of the strip itself.

In testimony whereof, I have signed my name to this specification.

PAUL 'WINSOR.

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