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1. (WO2017035115) PULL-TYPE DOUBLE DIAPHRAGM SPRING BRAKE ACTUATOR

Pub. No.:    WO/2017/035115    International Application No.:    PCT/US2016/048131
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Wed Aug 24 01:59:59 CEST 2016
IPC: F16D 65/28
B60T 17/08
Applicants: BENDIX SPICER FOUNDATION BRAKE LLC
Inventors: SCHWARTZ, Matthew James
ROBERTS, Will E.
Title: PULL-TYPE DOUBLE DIAPHRAGM SPRING BRAKE ACTUATOR
Abstract:
A spring-type brake actuator for a vehicle brake such as a pneumatically-actuated brake is provided, in which the actuator's operating rod is pulled toward the actuator to apply the brake. The actuator's parking brake release piston is located closer to the brake than the service brake piston, and the parking brake power spring is positioned between the mounting end of the actuator and the parking brake piston such that when parking brake release pressure is removed from the parking brake release chamber the parking brake piston biases the operating rod in the brake application direction, drawing the operating rod further into the actuator. The operating rod may penetrate the parking brake piston and an intermediate flange between the parking brake piston and the service brake piston, and be connected to the service brake piston such that the service brake piston may control brake application.