# US 11,299,387 B2 · Fuel shutoff valve

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- Number: US 11,299,387 B2
- Document ID: US11299387B2
- Status: Granted
- Kind: B2
- Application number: 16/916,641
- Filed: 2020-06-30
- Published: 2021-01-28
- Granted: 2022-04-12
- Earliest claimed: 2019-07-23
- Assignees: Toyoda Gosei Co., Ltd.
- Applicants: Toyoda Gosei Co., Ltd.
- Inventors: Takuro Iino; Yoshihiro Sakata; Hiroaki Kito
- Web page: https://patentgrep.com/patent/US11299387B2

## CPC

- B60K 15/03519: {Valve arrangements in the vent line}
- B67D 7/367: {the float acting pneumatically on a shut-off valve}
- B60K 2015/03289: {Float valves; Floats therefor}
- B60K 2015/03296: {Pressure regulating valves}
- B60K 2015/03585: {by gas pressure}
- 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
- B67D: DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR (cleaning pipes or tubes or systems of pipes or tubes B08B9/02; emptying or filling of bottles, jars, cans, casks, barrels, or similar containers, not otherwise provided for B67C; water supply E03; pipe systems F17D; domestic hot-water supply systems F24D; measuring volume, volume flow, mass flow or liquid level, metering by volume G01F; coin-freed or like apparatus G07F)

## Abstract

A casing 100 of fuel shutoff valve 10 includes a housing 120 having a partition part 122 with a communication hole 124, the partition part 122 dividing the inside of the casing into an upper space CU and a lower space CL, a check valve case 140 supporting a check valve structure 142, and a cutoff valve case 160 storing a float 162. The casing 100 includes a communication passage C10 connecting a space C16 storing the float 162 and a space C14 in the check valve case 140 and having a delivery opening 168 of the cutoff valve case, the communication hole 124, and a reception opening 146 of the check valve case. The reception opening 146 deviates relative to the delivery opening 168. The check valve case 140 includes an additional flow path part C142 allowing the circulation of fuel vapor, together with the communication hole.

## Claims

### Claim 1

A fuel shutoff valve, comprising:
a casing that allows circulation of fuel vapor in a fuel tank; and
a lid body that is attached to one end of the casing to change a direction of the circulation of fuel vapor having passed through the casing and send the fuel vapor to an outside, wherein
the casing includes
a housing that is provided with a partition part dividing an inside of the casing into an upper space and a lower space, the partition part having a communication hole allowing communication between the upper space and the lower space,
a check valve case that supports, in the upper space, a check valve structure maintaining an inner pressure of the fuel tank in a predetermined range, and
a cutoff valve case that stores, in the lower space, a float functioning as a cutoff valve preventing an outflow of liquid fuel through the casing,
the casing includes a communication passage connecting a space storing the float in the cutoff valve case and a space communicating to the outside in the check valve case, the communication passage including a delivery opening provided in the cutoff valve case, the communication hole provided in the partition part, and a reception opening provided in the check valve case, wherein
the check valve structure is configured such that the communication passage is blocked when the check valve structure is closed,
the reception opening is arranged at a position deviating to an inner side of the fuel shutoff valve relative to the delivery opening, and
the check valve case includes an additional flow path part that is a part of the communication passage, the additional flow path part allowing the circulation of fuel vapor from the delivery opening to the reception opening, together with the communication hole.

### Claim 2 (depends on 1)

The fuel shutoff valve according to claim 1, wherein the check valve case includes a projection projecting toward the cutoff valve case in the additional flow path part.