Automatic trailer sway sensing and brake applying system

Details Automatic trailer sway sensing and brake applying system Automatic trailer sway sensing and brake applying system

1979-04-18

1981-03-24

Blix, Trygve M.

Brakes

Operators

Automatic

180282, 280446B, 303 7, 303 20, B60T 720

Patent

active

RE0305502

ABSTRACT:
An apparatus for automatically sensing trailer sway and applying trailer brakes, thereby minimizing or eliminating the sway is provided. A hydraulic device, similar to a shock absorber with the addition of a pressure operated switch at each end of the cylinder, is mounted between the trailer A frame and the hitch head assembly. A sudden sway in either direction causes one of the switches to close and apply power to the electric trailer brakes thus minimizing or eliminating the sway and causing the car and trailer to "line up". The hydraulic device has an orifice in the piston or at each end of the cylinder so that normal turns made by the car and trailer do not cause sufficient pressure build up to cause either switch to operate. Similar automatic performance can be realized by the use of a gas filled bellows device.

REFERENCES:
patent: 3277791 (1966-10-01), Williams et al.
patent: 3288240 (1966-11-01), Franzel
patent: 3398991 (1968-08-01), Compton
patent: 3736894 (1973-06-01), McKeen
patent: 3758165 (1973-09-01), Savelli
patent: 3796288 (1974-03-01), Hollnagel
patent: 3810521 (1974-05-01), Sparr
patent: 3861696 (1975-01-01), Gustaffson
patent: 3861717 (1975-01-01), Knox
patent: 3894773 (1975-07-01), Cleveland et al.
patent: 3948544 (1976-04-01), Presley et al.
patent: 3993360 (1976-11-01), Greene
patent: 3993362 (1976-11-01), Kamins et al.

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