Sway control means for a trailer
First Claim
1. In a tow vehicle-trailer braking system having a first brake applying servomotor responsive to an operator input for establishing a first braking signal which will actuate the wheel brakes in the tow vehicle and a second brake applying servomotor responsive to said first braking signal for establishing a second braking signal which will actuate the wheel brakes in the trailer, sway control means for supplying said second brake applying servomotor with an independent actuation signal to momentarily activate the wheels brakes in the trailer, said sway control means comprising:
- a housing having a chamber therein with an entrance port, an exit port and an atmospheric port, said entrance port being adapted to receive said first braking signal from said first brake applying servomotor, said exit port being connected to the second brake applying servomotor;
distribution valve means located in said chamber for controlling a first flow path between the entrance port and the exit port;
poppet valve means located in said chamber for controlling a second flow path between the exit port and the atmospheric port;
resilient means connected to said housing for holding said distribution valve means away from said poppet valve means to permit the first braking signal to be communicated through said first flow path without interruption; and
mass means responsive to sway for activating said distribution valve means to interrupt communication in the first flow path by overcoming said resilient means to actuate said poppet valve means and allow air to flow through the atmospheric port into the second flow path to establish said independent actuation signal.
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Accused Products
Abstract
A sway control apparatus for use in a tow vehicle trailer braking system that provides a brake applying servomotor in the trailer with an independent actuation signal to attenuate oscillary forces which may develop between the trailer and the tow vehicle.
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Citations
7 Claims
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1. In a tow vehicle-trailer braking system having a first brake applying servomotor responsive to an operator input for establishing a first braking signal which will actuate the wheel brakes in the tow vehicle and a second brake applying servomotor responsive to said first braking signal for establishing a second braking signal which will actuate the wheel brakes in the trailer, sway control means for supplying said second brake applying servomotor with an independent actuation signal to momentarily activate the wheels brakes in the trailer, said sway control means comprising:
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a housing having a chamber therein with an entrance port, an exit port and an atmospheric port, said entrance port being adapted to receive said first braking signal from said first brake applying servomotor, said exit port being connected to the second brake applying servomotor; distribution valve means located in said chamber for controlling a first flow path between the entrance port and the exit port; poppet valve means located in said chamber for controlling a second flow path between the exit port and the atmospheric port; resilient means connected to said housing for holding said distribution valve means away from said poppet valve means to permit the first braking signal to be communicated through said first flow path without interruption; and mass means responsive to sway for activating said distribution valve means to interrupt communication in the first flow path by overcoming said resilient means to actuate said poppet valve means and allow air to flow through the atmospheric port into the second flow path to establish said independent actuation signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification