Fuel cap
AssigneeToyoda Gosei Co., Ltd.
InventorTomohiro SUGIZAKI
Life of this patent
Estimating the term…
Abstract
For transmission of rotative operation on a lid body to a cap body, a transmission mechanism for mechanically coupling the lid body and the cap body transmits the rotative operation on the lid body to the cap body. If a pressure difference determined across a seal plate between a pressure in an inlet and a pressure outside the inlet becomes a predetermined pressure or more, the seal plate makes irreversible shape change. The irreversible shape change of the seal plate releases the transmission mechanism from the mechanical coupling to at least one of the lid body and the cap body, thereby cutting transmission of the rotative operation on the lid body to the cap body. Thus, a fuel cap to be provided is capable of notifying the occurrence of abnormality in a fuel system as physical feeling during operation on the fuel cap.
Claims20
A fuel cap comprising:
- an annular cap body fitted to an inlet for fuel to be supplied to a fuel tank and fitted in an airtight state to the inlet;
- a lid body to receive rotative operation by a user for attachment and removal of the cap body to and from the inlet;
- a transmission mechanism mechanically coupled to the lid body and the cap body to transmit the rotative operation on the lid body to the cap body;
- and
- a seal plate provided in the cap body, the seal plate making irreversible shape change when a pressure difference between an internal pressure in the inlet in the airtight state and an external pressure outside the inlet exceeds a predetermined pressure difference to establish communication between the inlet and the atmosphere, wherein
- the irreversible shape change of the seal plate releases the transmission mechanism from the mechanical coupling to at least one of the lid body and the cap body.
Dependencies are inferred from the claim text.