# US 9,434,246 B2 · Fuel valve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,434,246 B2 - Document ID: US9434246B2 - Status: Granted - Kind: B2 - Application number: 13/985,304 - Filed: 2012-03-13 - Published: 2013-11-28 - Granted: 2016-09-06 - Earliest claimed: 2011-03-14 - Assignees: Raval A.C.S. Ltd. - Applicants: Omer Vulkan; Vladimir Olshanetsky; Alexander Khiliminsky - Inventors: Omer Vulkan; Vladimir Olshanetsky; Alexander Khiliminsky - Web page: https://patentgrep.com/patent/US9434246B2 ## CPC - B60K 15/03519: {Valve arrangements in the vent line} - F16K 24/042: {actuated by a float} - Y10T 137/0874: Vent opening or closing on tipping container - Y10T 137/3099: Float responsive - Y10T 137/7436: Float rigid with valve - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - 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)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Provided is a fuel valve including a uniform valve housing accommodating a roll-over valve (ROV), an over-pressure relief valve (OPR) and a pressure retention valve (PRV), wherein a pressure retention disc is substantially axially displaceable within a top chamber of the valve housing, between a normally closed portion in which it sealingly bears over an outlet port of the flow path and an open position; the pressure retention disc is configured with a cutout portion at least partially enveloping a pressure relief port of the valve. ## Claims ### Claim 1 A fuel valve, comprising: a valve housing accommodating a roll-over valve (ROV); an over-pressure relief valve (OPR); and a pressure retention valve (PRV), the PRV comprising a pressure retention disc that is substantially axially displaceable within a top chamber of the valve housing, between a normally closed position in which the pressure retention disc sealingly bears over an outlet port of a fluid flow path and an open position, the pressure retention disc having a center of gravity thereof coaxial with said outlet port and being configured with a cutout portion at least partially enveloping a wall portion of a pressure relief port of the valve. ### Claim 2 (depends on 1) The fuel valve according to claim 1, wherein the housing is configured with a partition wall defining the fluid flow path extending between a bottom chamber configured with an inlet port and the top chamber configured with the outlet port; the bottom chamber accommodates a spring loaded float member axially displaceable between a closed position wherein a sealing head of the float member sealingly engages the inlet port of the fluid flow path, and a normally open position wherein the sealing head is disengaged from the inlet port; a pressure relief port extending between the bottom chamber and a valve outlet and being normally sealed by a sealing plunger biased into sealing engagement within the top chamber. ### Claim 3 (depends on 2) The fuel valve according to claim 2, wherein the cutout portion of the pressure retention disc has a crescent-like or U-like or kidney-like shape. ### Claim 4 (depends on 2) The fuel valve according to claim 2, wherein the outlet port of the fluid flow path has an annular rim elevated from a top face of the partition wall, the annular rim configured for sealingly bearing the pressure retention disc when at the closed position. ### Claim 5 (depends on 2) The fuel valve according to claim 2, wherein the partition wall is configured with at least one disc support upwardly extending from the top face, the at least one disc support extending slightly below the annular rim of the fluid flow path. ### Claim 6 (depends on 5) The fuel valve according to claim 5, wherein the at least one disc support is configured as an annular or a segmented support, or as a plurality of projections. ### Claim 7 (depends on 2) The fuel valve according to claim 2, wherein a top cap of the valve is configured with at least one projection extending into the top chamber, restricting displacement of the pressure retention disc in the open position thereof. ### Claim 8 (depends on 7) The fuel valve according to claim 7, wherein the at least one projection extends from a bottom surface of the top cap. ### Claim 9 (depends on 2) The fuel valve according to claim 2, wherein the shape, thickness and weight of the pressure retention disc define the retention pressure at which the pressure retention disc will displace from its normally closed position to its open position, during filling a fuel tank. ### Claim 10 (depends on 2) The fuel valve according to claim 2, wherein the sealing plunger is spherical. ### Claim 11 (depends on 2) The fuel valve according to claim 2, wherein biasing force applied to the sealing plunger, defines a pressure threshold for displacing the over-pressure relief valve (OPR) into the open position. ### Claim 12 (depends on 2) The fuel valve according to claim 2, wherein a center of gravity of the pressure retention disc coextends substantially above the fluid flow path. ### Claim 13 (depends on 2) The fuel valve according to claim 2, wherein the float member is axially displaceable within the housing along a longitudinal axis offset from a longitudinal axis of the housing. ### Claim 14 A fuel valve, comprising: a valve housing accommodating a roll-over valve (ROV); an over-pressure relief valve (OPR); and a pressure retention valve (PRV), the PRV comprising a pressure retention disc that is substantially axially displaceable within a top chamber of the valve housing, between a normally closed position in which the pressure retention disc sealingly bears over an outlet port of a fluid flow path and an open position, the pressure retention disc is configured with a cutout portion at least partially enveloping a wall portion of pressure relief port of the valve, wherein the housing is configured with a partition wall defining the fluid flow path extending between a bottom chamber configured with an inlet port and the top chamber configured with the outlet port, the bottom chamber accommodates a spring loaded float member axially displaceable between a closed position wherein a sealing head of the float member sealingly engages said inlet port of the fluid flow path, and a normally open position wherein the sealing head is disengaged from the inlet port, a pressure relief port extending between the bottom chamber and a valve outlet and being normally sealed by a sealing plunger biased into sealing engagement within the top chamber, wherein the pressure retention disc has a circle segment removed, substantially opposite the cutout portion, to thereby facilitate fast pressure relief. ### Claim 15 A fuel valve, comprising: a valve housing accommodating a roll-over valve (ROV), an over-pressure relief valve (OPR), and a pressure retention valve (PRV), the PRV comprising a pressure retention disc that is substantially axially displaceable within a top chamber of the valve housing, between a normally closed position in which the pressure retention disc sealingly bears over an outlet port of a fluid flow path and an open position, the pressure retention disc is configured with a cutout portion at least partially enveloping a wall portion of pressure relief port of the valve, wherein the housing is configured with a partition wall defining the fluid flow path extending between a bottom chamber configured with an inlet port and the top chamber configured with the outlet port; the bottom chamber accommodates a spring loaded float member axially displaceable between a closed position wherein a sealing head of the float member sealingly engages said inlet port of the fluid flow path, and a normally open position wherein the sealing head is disengaged from the inlet port, a pressure relief port extending between the bottom chamber and a valve outlet and being normally sealed by a sealing plunger biased into sealing engagement within the top chamber, wherein a valve outlet of the over-pressure relief valve (OPR) and an outlet of the top chamber are discrete.