Patent ID: 7757547
Filing Date: 2010-07-20
Classification: F15B

Abstract:
1. A cylinder stroke position measurement device for measuring a stroke position of a cylinder, comprising: a rotary roller being in contact with a surface of a rod of the cylinder and rotating in accordance with displacement of the rod; a pressing member pressing the rotary roller against the surface of the rod; a rotation sensor section detecting an amount of rotation of the rotary roller; a coupling member electrically coupling the rotation sensor section with an external signal line; a base member attached to a head portion of the cylinder and having an opening accommodating at least the rotary roller and the rotation sensor section; a sensor holding member holding the pressing member, the rotary roller, and the rotation sensor section on its one side, and attached to the base member such that the rotary roller and the rotation sensor section are accommodated in the opening of the base member; the coupling member being arranged on an opposite side of the sensor holding member; and a lid member attached to the sensor holding member so as to cover the coupling member.