Patent ID: 6887174
Filing Date: 2005-05-03
Classification: F16H

Abstract:
1. A hydraulic pressure control apparatus comprising: hydraulic pressure control member which adjusts or switches hydraulic pressure of fluid applied to an object to be controlled; an upper case and a lower case that receive the hydraulic pressure control member and have an inside wall for forming a passage for the fluid; and a plate member interposed between the upper case and the lower case, the plate member being made of non-porous material and having a plurality of through holes to define a filter that filters the fluid flowing through the passage, the upper case and the lower case cooperating with the plate member in forming the passage for the fluid, wherein the plate member includes at least one communication hole for forming the passage for the fluid in cooperation with the upper case and the lower case, and wherein said communication hole has a diameter greater than a diameter of a said through hole.