Patent ID: 6651505
Filing Date: 2003-11-25
Classification: G01L

Abstract:
A pressure detecting apparatus comprising:a housing forming a fluid chamber into which external fluid pressure is imported; a pressure-receiving member slidably provided in said housing so that said pressure-receiving member moves when said pressure-receiving member receives said fluid pressure in said fluid chamber; an elastic member supported by said housing and engaged with said pressure-receiving member so that said elastic member is elastically deformed due to a slide displacement of said pressure-receiving member from a predetermined position; a displacement detecting device which detects said displacement of said pressure-receiving member from said predetermined position; and said elastic member including a base portion supported by said housing, an engagement portion engaged with said pressure-receiving member, and a plurality of flexible arms, each of the plurality of flexible arms extending from said base portion toward said engagement portion along a plane approximately perpendicular to a direction of sliding of said pressure-receiving member, each flexible arm forming a portion of the elastic member intersectable by a straight line connecting a center of the engagement portion to a junction between the base portion, each flexible arm extending for substantially one turn about the center of the engagement portion from the base portion to the engagement portion and each flexible arm extending in the same direction and extending from respective different parts of said base portion to said engagement portion in an overlapping arrangement.