Back to results
US 6,658,747 B2Granted
Position sensor for a hydraulic actuator and hydraulic system using the same
AssigneeYasunaga Corporation
InventorShinji Kuru
Life of this patent
Estimating the term…
Abstract
A hydraulic system includes position sensors that are provided together with solenoid valves in fluid passages extending between a working fluid source and hydraulic actuators. Each position sensor is comprised of two gears disposed in the fluid passage so as to be rotatable by the flow of working fluid, and two sensing elements each disposed to face either one of the gears. A controller determines the operating position of each actuator based on sensor outputs that are out of phase with each other and are generated by the sensing elements each time the gears rotate for a predetermined angle.
Claims15
A position sensor, comprising:
- at least one gear disposed in a fluid passage of a hydraulic actuator so as to be rotatable by a flow of working fluid in the fluid passage;
- a first sensing element, disposed to face said gear, for generating a first sensor output each time the gear rotates for a predetermined angle;
- a second sensing element, disposed to face said gear, for generating a second sensor output which is out of phase with the first sensor output each time said gear rotates for the predetermined angle;
- and
- a detecting section for determining an operating position of said hydraulic actuator based on the first and second sensor outputs supplied from said first and second sensing elements.
2 more elements
Dependencies are inferred from the claim text.