US 12,134,314 B2
Fill-up restriction valve
Takuma Kon, Kanagawa (JP); and Kenta Mihara, Kanagawa (JP)
Assigned to PIOLAX, INC., Kanagawa (JP)
Filed by PIOLAX, INC., Kanagawa (JP)
Filed on Nov. 8, 2022, as Appl. No. 17/982,852.
Claims priority of application No. 2021-182253 (JP), filed on Nov. 9, 2021.
Prior Publication US 2023/0144508 A1, May 11, 2023
Int. Cl. B60K 15/03 (2006.01)
CPC B60K 15/03006 (2013.01) [B60K 2015/03019 (2013.01); B60K 2015/03026 (2013.01); B60K 2015/03289 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A fill-up restriction valve comprising:
a housing, in which a valve chamber configured to communicate with inside of a fuel tank is provided on a lower side by a partition wall, a ventilation chamber configured to communicate with outside of the fuel tank is provided on an upper side by the partition wall, and an opening configured to communicate the valve chamber with the ventilation chamber is formed in the partition wall; and
a float valve accommodated in the valve chamber in a manner of being movable up and down, the float valve configured to close the opening when a fuel liquid level rises to a predetermined height during refueling into the fuel tank,
wherein the housing includes
a housing body including a body-side peripheral wall, and
a lower cap including a cap-side peripheral wall, the lower cap
being installed to a lower side of the housing body by a joint portion, wherein the joint portion includes
an annular groove provided in one of an upper end portion of the cap-side peripheral wall and a lower end portion of the body-side peripheral wall,
an insertion wall portion provided on an other one of the upper end portion of the cap-side peripheral wall and the lower end portion of the body-side peripheral wall, the insertion wall portion configured to be inserted into the annular groove, and
an annular protrusion formed on one of the insertion wall portion and the annular groove, or an annular seal member disposed between the insertion wall portion and the annular groove, and
wherein the annular protrusion or the annular seal member is configured to be in pressure-contact with the annular groove and the insertion wall portion and a gap is defined between an outer side surface of the insertion wall portion and the annular groove at a position above the annular protrusion or the annular seal member, in a state where the insertion wall portion is inserted into the annular groove.