Patent ID: 11892095
Assignee: DENSO CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 5:
6. A valve device through which a fluid flows, comprising:
a driving source making a rotational motion;
a rotated part provided rotatably around a predetermined axis;
a fluid passage portion having a flow hole for passing the fluid;
a gear mechanism having a plurality of gears to transmit the rotational motion of the driving source to the rotated part by engagement between the plurality of gears to rotate the rotated part; and
a biasing part biasing the rotated part toward one side in a circumferential direction about the predetermined axis, wherein
the rotated part includes a rotor increasing or reducing an opening of the flow hole in conjunction with rotation of the rotated part and is rotated according to the rotational motion of the driving source while being biased toward the one side in the circumferential direction by the biasing part,
the biasing part has an elastic member that produces energization force biasing the rotated part toward the one side in the circumferential direction by elastic deformation of the biasing part,
a movable range of the rotated part in the circumferential direction includes
an opening limiting range within which an opening of the flow hole is smaller than a fully opened opening and is larger than a fully closed opening, and
a rotational position where the biasing part does not bias the rotated part in the circumferential direction, and

when the rotated part is positioned within the opening limiting range, the biasing part biases the rotated part toward the one side in the circumferential direction.