US 12,372,127 B2
Brake system for mine trucks
Chris Davis, Hinckley, OH (US); Kyle Hummel, Hudson, OH (US); and Edwin Zak, Grafton, OH (US)
Assigned to CMBF Products, Inc., Waukesha, WI (US)
Filed by CMBF Products, Inc., Waukesha, WI (US)
Filed on Sep. 3, 2021, as Appl. No. 17/466,483.
Application 17/466,483 is a continuation in part of application No. 17/102,799, filed on Nov. 24, 2020, abandoned.
Application 17/102,799 is a continuation of application No. 16/034,666, filed on Jul. 13, 2018, granted, now 10,851,859, issued on Dec. 1, 2020.
Claims priority of provisional application 62/537,153, filed on Jul. 26, 2017.
Prior Publication US 2021/0396286 A1, Dec. 23, 2021
Int. Cl. F16D 65/097 (2006.01); B60T 13/22 (2006.01); F16D 55/24 (2006.01); F16D 55/00 (2006.01); F16D 57/00 (2006.01)
CPC F16D 65/0971 (2013.01) [B60T 13/22 (2013.01); F16D 55/24 (2013.01); F16D 65/0972 (2013.01); B60Y 2200/417 (2013.01); F16D 2055/0091 (2013.01); F16D 2055/0095 (2013.01); F16D 57/007 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A brake system for a piece of equipment having a frame and a shaft rotatable relative to the frame, the brake system comprising:
a series of rotors and stators, including a plurality of rotors configured to be operatively coupled to the shaft and configured to rotate with the shaft relative to the frame, and a plurality of stators configured to be operatively coupled to the frame and configured to be fixed against rotation relative to the frame;
a service brake system including an annular service piston positioned to extend continuously around the series of rotors and stators such that pressurization of fluid in the service brake system acts on the service piston opposite the series of rotors and stators and drives the service piston to continuously engage around the series of rotors and stators such that the rotors and stators are compressed together and thereby create braking torque; and
a parking brake system including an annular parking piston positioned to extend continuously around the series of rotors and stators, at least one parking piston spring creating a parking piston spring bias acting on the parking piston to drive the parking piston to continuously engage around the series of rotors and stators such that the rotors and stators are compressed together and thereby create braking torque,
wherein the service piston is configured for nesting with the parking piston such that the service piston is positioned between the parking piston and the series of rotors and stators,
wherein the parking piston and the service piston are configured to continuously engage together around the series of rotors and stators to thereby create the braking torque,
wherein the brake system is configured such that the series of rotors and stators is free from oil flow,
wherein the service piston is positioned between the parking piston and the series of rotors and stators such that when a braking force is applied to the parking piston, the braking force is applied by the parking piston to the service piston and by the service piston to the series of rotors and stators, and
wherein at least one service piston spring creating a service piston spring bias on the service piston is positioned coaxially with the at least one parking piston spring creating the parking piston spring bias acting on the parking piston.