Patent ID: 11920578
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A valve comprising:
a first plate having a first vent hole;
a second plate defining a valve chamber between the second plate and the first plate, the valve chamber communicating with the first vent hole, and the second plate having a second vent hole communicating with the valve chamber and not facing the first vent hole; and
a movable plate having a third vent hole facing the second vent hole, the movable plate being disposed in the valve chamber such that the movable plate is movable between the first plate and the second plate,
wherein the second plate has an auxiliary hole not facing the third vent hole of the movable plate,
wherein the second plate includes
a first principal surface facing the valve chamber,
a second principal surface at a side opposite to the first principal surface, and
an inner side surface connecting the first principal surface and the second principal surface so as to provide the auxiliary hole, said inner side surface having a substantially convex rounded shape in a front view of the first principal surface of the second plate at a side facing the valve chamber,

wherein an angle between the inner side surface and the first principal surface is an obtuse angle, and
wherein the substantially convex rounded shape has a radius of greater than or equal to about 0.005 mm and less than or equal to about 0.25 mm.