Patent ID: 9573574
Date: 2017-02-21
CPC Classifications: B60T,F16H

Claim:
1. A brake modulator for a parking brake system of a work vehicle, the brake modulator comprising: a housing extending between a first end and a second end, the housing defining a fluid chamber, an auxiliary chamber, a fluid inlet channel in fluid communication with the fluid chamber, and a fluid outlet channel in fluid communication with the fluid chamber; a piston disposed within the housing between the fluid chamber and the auxiliary chamber, the piston movable between a first position wherein the fluid chamber has a first volume and a second position wherein the fluid chamber has a second volume greater than the first volume; a first biasing element providing a biasing force on the piston towards the first position; a rod extending between a first end disposed within the housing and a second end disposed exterior to the housing; a handle connected to the second end of the rod, wherein the rod is manually actuatable to move the piston between the first position and the second position; and a secondary biasing element which connects the rod and piston, wherein the secondary biasing element is disposed within the fluid chamber.