Patent attributes
A seat reclining apparatus for a vehicle includes a first plate held at one of a seat cushion frame and a seatback frame, a second plate held at the other one of the seat cushion frame and the seatback frame, a pole having an external tooth facing the internal tooth, a first protrusion provided at the pole, a restricting portion provided at the second plate so as to face the first, the restricting portion coming in contact with the first protrusion so that the internal tooth and the external tooth are prohibited from being engaged, a second protrusion provided at the pole, and a stopper portion provided at the second plate for keeping a rotational angle of the second plate relative to the first plate at a predetermined angle upon a contact with the second protrusion.