Roll-over valve for motor vehicles

Claim 1

A valve device comprising a valve body adapted for mounting in a substantially upright position in a motor vehicle, the valve body defining a valve chamber and including: an upper outlet communicating with the valve chamber; an inlet communicating with the valve chamber; a raised seat disposed in the valve chamber below the outlet and including an upper concave conical surface portion and at least one slot extending across a portion of the raised seat and downwardly into it; a freely movable ball resting on the conical surface, the ball being normally positioned at the center of the conical surface when the valve is upright and rolling up the conical surface when the valve is inclined, and a cage for the ball, the cage being arranged for vertical reciprocable movement in the chamber by the ball as it rolls on the conical seat, the cage including a cage top member disposed below the upper outlet and above the ball and adapted to close the outlet upon being moved toward the outlet, at least one bottom cage cross member disposed below the ball and in the seat slot for vertical reciprocal movement therein when the ball rolls up and down the conical surface, and side members extending between the top and bottom cage members for maintaining them in a fixed space relationship at least on the order of the diameter of the ball whereby the ball fits between the top and bottom cage members and urges the cage upwardly by contacting the top member upon inclination of the valve and downwardly by contacting the bottom member upon returning the valve to the upright position to provide both positive closing and positive opening of the valve outlet by the ball.