초록 ▼

A valve assembly for controlling actuation of an actuator of a track tensioning system for adjusting tension on a drive track chain includes a valve housing defining (i) a master chamber, (ii) a slave chamber, (iii) a fluid passage which fluidly couples the master chamber to the slave chamber, and (

A valve assembly for controlling actuation of an actuator of a track tensioning system for adjusting tension on a drive track chain includes a valve housing defining (i) a master chamber, (ii) a slave chamber, (iii) a fluid passage which fluidly couples the master chamber to the slave chamber, and (iv) a fluid outlet which fluidly couples the slave chamber to the actuator. The valve assembly also includes a master valve member positioned within the master chamber. The master valve member (i) isolates the master chamber from the slave chamber when the master valve member is positioned in a first master position, and (ii) places the master chamber in fluid communication with the slave chamber when the master valve member is positioned in a second master position. The valve assembly further includes a slave piston positioned within the slave chamber, the slave piston (i) isolates the fluid outlet from the slave chamber when the slave piston is positioned in a first slave position, and (ii) places the fluid outlet in fluid communication with the slave chamber when the slave piston is positioned in a second slave position. Movement of the master valve member from the first master position to the second master position causes movement of the slave piston from the first slave position to the second slave position. Movement of the slave piston from the first slave position to the second slave position causes actuation of the actuator, whereby tension on the drive track chain is adjusted by the actuator.

대표청구항 ▼

[ What is claimed is:] [1.]1. A valve assembly for controlling actuation of an actuator of a track tensioning system for adjusting tension on a drive track chain, comprising:a valve housing defining (i) a master chamber, (ii) a slave chamber, (iii) a fluid passage which fluidly couples said master c

[ What is claimed is:] [1.]1. A valve assembly for controlling actuation of an actuator of a track tensioning system for adjusting tension on a drive track chain, comprising:a valve housing defining (i) a master chamber, (ii) a slave chamber, (iii) a fluid passage which fluidly couples said master chamber to said slave chamber, and (iv) a fluid outlet which fluidly couples said slave chamber to said actuator;a master valve member positioned within said master chamber, said master valve member (i) isolates said master chamber from said slave chamber when said master valve member is positioned in a first master position, and (ii) places said master chamber in fluid communication with said slave chamber when said master valve member is positioned in a second master position; anda slave piston positioned within said slave chamber, said slave piston (i) isolates said fluid outlet from said slave chamber when said slave piston is positioned in a first slave position, and (ii) places said fluid outlet in fluid communication with said slave chamber when said slave piston is positioned in a second slave position,wherein movement of said master valve member from said first master position to said second master position causes movement of said slave piston from said first slave position to said second slave position, andwherein movement of said slave piston from said first slave position to said second slave position causes actuation of said actuator, whereby tension on said drive track chain is adjusted by said actuator.