US 11,052,886 B2
Hydraulic brake system with make-up line
Brandon J. Schwoerer, Washington, IL (US); and Lance M. Cowper, Metamora, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Sep. 20, 2019, as Appl. No. 16/577,720.
Prior Publication US 2021/0086738 A1, Mar. 25, 2021
Int. Cl. B60T 8/48 (2006.01); B60T 8/34 (2006.01); B60T 8/40 (2006.01); B60T 17/04 (2006.01); B60T 13/16 (2006.01)
CPC B60T 8/341 (2013.01) [B60T 8/40 (2013.01); B60T 8/4827 (2013.01); B60T 13/16 (2013.01); B60T 17/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydraulic brake system comprising:
a supply pump having a pressurized supply pump outlet, the outlet connected to a brake control system via a brake control supply line;
a pressure-released brake connected to the brake control system via a brake line;
a pressure relief valve having an inlet and an outlet,
the inlet connected to the brake control supply line, and
the outlet connected to a relief valve discharge line;
a make-up line connecting the brake line and the relief valve discharge line; and
a check valve on the make-up line allowing one-way flow from the relief valve discharge line to the brake line.