[0001] This application claims priority to co-pending Application Ser. No. 16/953,998 filed Nov. 20, 2020 and entitled “Hydrostatically Adjustable Valve and Associated System,” which itself is a continuation-in-part of, and claims priority to, Application Ser. No. 15/973,855 filed May 8, 2018, and entitled “Externally Adjustable Flow Management Valve Assembly and System,” which itself is a continuation-in-part of, and claims priority to Application Ser. No. 15/496,212 filed on April 25, 2017 and entitled “Externally Adjustable Flow Management Valve Assembly and System,” now U.S. Pat. No. 10,544,569 issued Jan. 28, 2020, the contents of which are incorporated herein for all purposes.

TECHNICAL FIELD

[0002] This disclosure relates to a valve. More particularly, the present disclosure relates to a hydrostatically adjustable valve that can be used to regulate the flow of a fluid. The disclosure further relates to a system incorporating such a valve.

BACKGROUND OF THE INVENTION

[0003] Flow regulating valves are known in the art and have varied uses. Flow regulating vales, for example, can be used to drive out entrained air and increase fluid densities. U.S. Pat. App. 2009/0289207 to Barreda discloses a flow regulating valve that is disposed within a water supply line. The valve is structured to reduce or significantly eliminate entrained air present within the water. By driving out air, the density of the water is increased. The valve body of Barreda includes a sealing structure that is biased under a predetermined force into sealing relation with an inlet. The predetermined force is sufficient to prevent displacement of the sealing structure out of the sealing relation with the inlet, but insufficient to prevent displacement of the sealing structure when force from a normal water flow is exerted thereon. As a result, any air flow within the water supply line will be compressed or otherwise disbursed. This increases the efficiency of associated water meters and reduces the charges to a metered facility.

[0004] Although the device of Barreda is sufficient to achieve its stated objective, it is lacking in many respects. The valve assembly of Barreda is needlessly complex with an excess number of moving parts. Moreover, the number of interconnected moving parts requires the device to be lubricated. This lubrication can result in the contamination of the associated drinking water. The valve of Barreda is also problematic in that the predetermined force is not adjustable. As such, the threshold water pressure required to open the valve cannot be adjusted. This is a drawback as a user may wish to increase or decrease this threshold pressure depending upon the application.

[0005] Yet another flow regulating valve is disclosed in U.S. Pat. 8,707,981 to Edgeworth. Edgeworth is likewise concerned with increasing the efficiency of an associated water meter by driving out entrained air. The valve of Edgeworth includes a plunger that is biased into a sealing orientation by way of a spring. A backing plate is used to secure the spring in place. The backing plate includes two opposing shoulders with different heights. The initial tension of the spring can be adjusted by removing the backing plate and selecting which of the two shoulders are in contact with the spring. This, in turn, determines the threshold water pressure that is necessary to unseat the plunger and allow the flow of the fluid. As such, Edgeworth is an advance over Barreda as it allows the threshold pressure to be adjusted.

[0006] The device of Edgeworth, however, also suffers from drawbacks. For example, the spring tension can only be changed by disassembling the valve and removing the backing plate. Doing so requires the flow of water to be interrupted, which can be problematic in the event the fluid is water being supplied to a residence or business. Furthermore, the Edgeworth valve has only two pre-set threshold pressures. Depending upon the particular application, a user may wish to select a threshold pressure that is different that the two pre-sets offered by Edgeworth.

[0007] Still yet another flow controlling valve is disclosed in U.S. Pat. 10,544,569 to Chalfin. Chalfin discloses a flow regulating valve that is externally adjustable. The Chalfin device includes inner and outer housings that contain a spring biased valve disc. The spring biased valve disc can be used to open to close the valve as needed. The tension of the spring can be adjusted from outside of the outer housing via an adjustment tool. Chalfin is an advance over Edgeworth because it allows the threshold pressure to be adjusted without the need to disassemble the valve. It also allows the user to select from more than just two pre-set threshold pressures. [0008] The Chalfin, therefore, overcomes many of the drawbacks associated with the Edgeworth and Barreda. Nonetheless, Chalfin still suffers from some drawbacks. The threshold pressure can only be adjusted via the external tool. If the external tool becomes lost or damaged, the threshold pressure cannot be adjusted. Also, depending upon the desired threshold pressure, the user may have to use the tool to repeatedly rotate the inner housing with respect to the outer. This repetitive motion may be time consuming and strenuous. It also does not allow for fine adjustments to the threshold pressure. Furthermore, the Chalfin device uses a spring as the main resistance, which limits both its effectiveness and variability. It also affects the overall size of the device.

[0009] The flow regulating valve of the present disclosure is designed to overcome these and other shortcomings present in the art.

SUMMARY OF THE INVENTION

[0010] This disclosure provides a flow control valve that is hydrostatically adjustable and that allows the threshold pressures to be adjusted via a variable orifice.

[0011] The disclosed system has several important advantages. For example, the hydrostatic control requires fewer moving parts and tools are not required to make the adjustments.

[0012] A further possible advantage is that the hydrostatic adjustment allows for an infinite number of adjustments to be made to the threshold pressure.

[0013] Still yet another possible advantage is that adjustments to the threshold pressure can be made without disassembling the valve.

[0014] Other advantages are realized by utilizing hydrostatic resistance, which allows for greater ranges of minimum and maximum threshold pressures and which further provides a device with a compact size.

[0015] Another advantage of the present system is to provide a valve that allows the threshold pressure to be automatically adjusted in response to changing water pressures. [0016] Various embodiments of the invention may have none, some, or all of these advantages. Other technical advantages of the present invention will be readily apparent to one skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following descriptions, taken in conjunction with the accompanying drawings, in which:

[0018] FIG. 1 is a perspective view of the flow valve of the present disclosure.

[0019] FIG. 2 is a perspective, sectional view of the flow valve in the closed state.

[0020] FIG. 3 is a perspective, sectional view of the flow valve in the opened state.

[0021] FIG. 4 is a diagram of the system of the present disclosure.

[0022] Similar reference numerals refer to similar components throughout the several views of the drawings. DETAILED DESCRIPTION OF THE DRAWINGS

[0023] The present disclosure relates to a hydrostatically adjustable flow control valve. The valve can be used to, for example, compress any entrained air within a water supply. However, it has beneficial uses in connection with a variety of other fluids. In one embodiment, the valve includes a fixed sleeve that slidably receives a spool. A spring biases the spool relative to the fixed sleeve. A primary orifice is used to deliver fluid to the interior area of the fixed sleeve and spool. A control device is used to selectively vary the rate at which fluid drains from the interior area. Draining the fluid results in the spool being received within the interior of the fixed sleeve. The movement of the spool opens flow ports within the sleeve. This, in turn, allows fluid to exit the valve. Conversely, the control device can be set to prevent fluid drainage. This results in the spool extending from interior of the fixed sleeve, the closure of the flow ports, and the sealing of the valve. [0024] The hydrostatically adjustable flow valve (20) of the present disclosure is illustrated in Figures 1 -3. As illustrated, valve (20) includes a cylindrical outer housing (22) that is defined by an inlet (24), an outlet (26), a bottom portion (28), and an interior area (32). One or more flanges (34) are positioned about both the inlet and outlet (24 and 26). These flanges (34) can be sealed by O-rings. As is known, flanges (34) allow valve (20) to be mechanically coupled to inlet and outlet flow lines. With reference to Figures 2-3, a first outlet port (36) is formed through the bottom portion (28) of the outer housing (22). The purpose of this outlet port (36) is described in greater detail hereinafter.

[0025] A cylindrical fixed sleeve (42) is positioned within the interior area (32) of the outer housing (22). The space between the fixed sleeve (42) and the outer housing (22) allows for the passage of the fluid to the valve outlet (26). This fixed sleeve (42) includes an outer wall (44) and a bottom portion (46). A first opened end (48) of sleeve (42) is positioned adjacent the valve inlet (24) while a second closed end (52) is positioned adjacent the valve outlet (26). As noted in Figures 2-3, a series of flow ports (54) are formed through the outer wall (44) at a location proximate the first end (48). As noted in Figure 3, flow port (54) take the form of rectangular cut outs formed within outer wall (44). The number and size of the ports (54) can be selected depending upon the intended flow rate. The flow ports (54) are fluidly interconnected to the outlet (26). Namely, when ports (54) are opened, fluid flows continuously into inlet (24), out through ports (54), between the outer housing (22) and sleeve (42), and finally exiting through valve outlet (26). A second outlet port (56) is formed through the bottom portion (46) of the fixed sleeve (42) and is in fluid communication with an interior area (58) of fixed sleeve (42).

[0026] The opening and closing of ports (54) is controlled by a spool (62) that is slidably received within the first opened end (48) of the fixed sleeve (42). As illustrated, an 0-ring (64) is preferably positioned between the fixed sleeve (42) and the spool (62) to maintain a fluid tight seal. Spool (62) has a first generally closed end (66), an opened second end (68), and an interior area (72). A primary orifice (74) is formed within the first generally closed end (66) and allows fluid to be delivered to the interior of fixed sleeve and spool (58 and 72).

[0027] Spool (62) thus has a first orientation wherein the first end (66) of the spool (62) is generally flush with both the first end (48) of the cylindrical fixed sleeve (42) and inlet (24). In this orientation, spool (62) blocks flow ports (54) to preclude the flow of fluid. Furthermore, the generally closed end (66) prevent the ingress of fluid. Nonetheless, in this orientation, fluid is still permitted to flow through primary orifice (74). This fluid can be permitted to accumulate within the interior of the valve or can be selectively drained as described below. Spool (62) also has a second orientation wherein the first end (66) of the spool (62) is positioned at a location inward of the first end (48). The exact position of the spool (62) relative to fixed sleeve (42) will depend upon the volume (and pressure) of fluid contained within the interior areas (58 and 72) of fixed sleeve (42) and spool (62). In the second orientation, the position of spool (62) allows fluid to flow through flow ports (54).

[0028] A coil spring (82) is positioned within the interior of valve (20). More specifically, a first end (84) of the spring (82) is positioned within the interior area (72) of the spool (62) and a second end (86) of spring (82) is positioned within the interior area (58) of the cylindrical fixed sleeve (42). The spring (82) is used to bias the spool (62) to the first orientation. However, when the fluid pressure within the interior areas (58 and 72) drops below a defined threshold pressure, spring (82) is allowed to retract, thereby allowing spool (62) to move inwardly with respect to fixed sleeve (42), thereby opening the flow ports (54). [0029] The rate at which fluid drains from the interior of valve (20) can be adjusted via control device (92). The rate of fluid drainage also controls the threshold pressure for opening valve (20). A control device (92) is fluidly interconnected to the first and second outlet ports (36 and 56). The control device (92) preferably includes a dial (94) for selectively varying the rate at which fluid drains from the interior areas (58 and 72) of the cylindrical fixed sleeve and spool (42 and 62). The draining of this fluid results in the spool (62) attaining the second orientation and allowing the fluid to flow through the flow ports (54) and the outlet (26). In the preferred embodiment, control device (92) is a helix shaped closure member that can selectively limit flow from the outlet ports (36 and 56). However, control device (92) can employ any of a variety of closure means, such as, a needle valve. Control device (92) can optionally be electronically controlled.

[0030] The system (102) of the present disclosure is illustrated in Figure 4. As illustrated, valve (108) (which may be the hydrostatically controlled valve described above) is located downstream of a fluid supply (104) and a fluid meter (106). Valve (108) is used to compress entrained air within the upstream fluid supply, which in turn maintains the upstream pressure (or PSI) to increase the efficiency of meter (106). This ensures that any entrained air is not allowed to expand and also that any entrained air has the lowest possible volume when measured. The threshold pressure of valve (108) is determined by the flow rate of an associated secondary outlet (114). This drainage may be delivered to a reservoir or may be used in connection with the intended fluid usage (116).

[0031] Although this disclosure has been described in terms of certain embodiments and generally associated methods, alterations and permutations of these embodiments and methods will be apparent to those skilled in the art. Accordingly, the above description of example embodiments does not define or constrain this disclosure. Other changes, substitutions, and alterations are also possible without departing from the spirit and scope of this disclosure.