# US 7,410,146 B2 · Drain valve with flow control > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,410,146 B2 - Document ID: US7410146B2 - Status: Granted - Kind: B2 - Application number: 10/874,625 - Filed: 2004-06-23 - Published: 2005-12-29 - Granted: 2008-08-12 - Earliest claimed: 2004-06-23 - Assignees: Bestway Inflatables & Materials Corp. - Inventors: ChaoYang Huang - Web page: https://patentgrep.com/patent/US7410146B2 ## CPC - F16K 3/265: {with a sleeve sliding in the direction of the flow line} - F16K 31/445: {with exterior sleeve} - F16K 31/5286: {comprising a sliding valve} - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} ## Abstract A drain valve allows liquid to flow into or out of a liquid-container product by use of a restriction cap having a control ring that twists in and out of a base ring in order to control the flow. The restriction cap has a flow valve, having a top, apertures, and a base, and a control ring, having a top, base, center aperture, and protrusions. The control ring is sealed against the flow valve top by an O-ring when the drain valve is closed and is also sealed against the side of the flow valve. As the control ring is twisted into the base ring, control ring protrusions twist within channels inside the base ring and a piston valve is depressed, allowing liquid to flow. As the control ring is twisted out of the base ring, the control ring base blocks the flow apertures, preventing liquid from flowing. ## Claims ### Claim 1 A drain valve, comprising: a restrictor cap, comprising: a flow valve having a flow valve top mated with a flow valve base that contains at least one flow valve aperture just below the flow valve top; and a moveable control ring having a control ring aperture slidably surrounding the flow valve, and a control ring top mated to a control ring base, the control ring top remaining at all times below the flow valve top, the control ring base having at least one control ring protrusion; and a stationary base ring for receiving the moveable control ring to control operation of the drain valve, the base ring surrounding at least the control ring protrusion, the base ring further being sealed around the bottom portion of the flow valve base and having at least one interior channel for containing the control ring protrusion, wherein the channel protrudes partially into an interior surface of the stationary base ring and an exterior surface of the stationary base ring is a continuous, unbroken surface, the channel being constructed and arranged to rotationally receive the control ring protrusion such that rotational movement of the control ring causes the protrusions to rotate within the channel to thereby open or close the drain valve. ### Claim 2 (depends on 1) The drain valve of claim 1, further comprising a hose connector releasably connected to the base ring. ### Claim 3 (depends on 1) The drain valve of claim 1, further comprising a safety cap releasably connected to the base ring. ### Claim 4 (depends on 1) The drain valve of claim 1, further comprising an O-ring surrounding the top of the flow valve base for forming a seal with the control ring base when the drain valve is closed. ### Claim 5 (depends on 1) The drain valve of claim 1, further comprising an O-ring surrounding the flow valve base for forming a seal with the control ring base to prevent liquid leakage through the base ring channel. ### Claim 6 A valve, comprising: a stationary base ring; a flow valve connected into the base ring and having a flow valve top mated with a flow valve base that contains at least one flow valve aperture just below the flow valve top; and a movable control ring having a control ring aperture slidably surrounding the flow valve, a control ring top mated to a control ring base that is moveable with respect to the base ring to control operation of the valve, and at least one control ring protrusion attached to the control ring base and movably inserted within a channel in the base ring, the control ring top remaining at all times below the flow valve top, wherein the channel protrudes partially into an interior surface of the stationary base ring and an exterior surface of the stationary base ring is a continuous, unbroken surface, the channel being constructed and arranged to rotationally receive the control ring protrusion such that rotational movement of the control ring causes the protrusions to rotate within the channel to thereby open or close the drain valve. ### Claim 7 (depends on 6) The valve of claim 6, further comprising a hose connector releasably connected to the base ring. ### Claim 8 (depends on 6) The valve of claim 6, further comprising a safety cap releasably connected to the base ring. ### Claim 9 (depends on 6) The valve of claim 6, further comprising an O-ring surrounding the top of the flow valve base for forming a seal with the control ring base when the drain valve is closed. ### Claim 10 (depends on 6) The valve of claim 6, further comprising an O-ring surrounding the flow valve base for forming a seal with the control ring base to prevent liquid leakage through the base ring channel. ### Claim 11 A liquid-container product having a container for holding liquids and a drain valve, the drain valve comprising: a stationary base ring; a flow valve connected into the base ring and having a flow valve top mated with a flow valve base that contains at least one flow valve aperture just below the flow valve top; and a movable control ring having a control ring aperture slidably surrounding the flow valve, a control ring top mated to a control ring base that is moveable with respect to the base ring to control operation of the drain valve, and at least one control ring protrusion attached to the control ring base and movably inserted within a channel in the base ring, the control ring top remaining at all times below the flow valve top, wherein the channel protrudes partially into an interior surface of the stationary base ring and an exterior surface of the stationary base ring is a continuous, unbroken surface, the channel being constructed and arranged to rotationally receive the control ring protrusion such that rotational movement of the control ring causes the protrusions to rotate within the channel to thereby open or close the drain valve. ### Claim 12 (depends on 11) The liquid-container product of claim 11, further comprising a hose connector releasably connected to the base ring of the drain valve. ### Claim 13 (depends on 11) The liquid-container product of claim 11, further comprising a safety cap releasably connected to the base ring of the drain valve. ### Claim 14 (depends on 11) The liquid-container product of claim 11, the drain valve further comprising an O-ring surrounding the top of the flow valve base for forming a seal with the control ring base when the drain valve is closed. ### Claim 15 (depends on 11) The liquid-container product of claim 11, the drain valve further comprising an O-ring surrounding the flow valve base for forming a seal with the control ring base to prevent liquid leakage through the base ring channel.