Patent ID: 8840197
Filing Date: 2014-09-23
Classification: B60T,F16K

Abstract:
1. A vehicle hand control brake valve, comprising: a piston positioned based on an engagement of a vehicle parking brake; a service brake actuation valve; a control mechanism mechanically interacting with the service brake actuation valve to set a position of the service brake actuation valve, a level of actuation of vehicle service brakes being set based on the position of the service brake actuation valve, the service brake actuation valve being set to a position to actuate the service brakes when the control mechanism is set to a latch position based on a position of the piston, and the control mechanism only being latched in the latch position when the vehicle parking brake is engaged; and a port receiving a fluid pressure signal based on the engagement of the vehicle parking brake, the fluid pressure signal positioning the piston relative to the control mechanism.