Electro-pneumatic emergency brake control system for a vehicle train
OwnerEduard Cermakinventor
Life of this patent
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Abstract
There is provided a brake system for a vehicle train which includes a tractor and a trailer, a source of high pressure air connected through an air control line to a pneumatic brake with the air control line in the tractor being connected to a fast-acting pressure switch which is activated by a higher pressure and a slow-acting pressure switch which is activated by a lower pressure, and with the fast-acting pressure switch operatively connected to open a valve to supply high pressure air directly to the trailer brake, and with said low pressure switch operatively connected to open the circuit which includes the fast-acting pressure switch.
Claims4
A brake system for a vehicle train including a tractor and a trailer which comprises:
- a. a source of high pressure connected through a control line to operate a pneumatic brake system in a tractor vehicle and in a trailer vehicle,
- b. an electric circuit which, when closed, electrically opens a valve to supply high pressure air directly to the brake system in said trailer vehicle,
- c. a fast-acting pressure switch on said tractor vehicle and in said electric circuit, said fast-acting switch acting responsive to a particular pressure in said control line to close said electric circuit,
- d. a slow-acting pressure switch on said tractor vehicle and in said electric circuit, said slow-acting pressure switch acting responsive to a pressure in said control line that is lower than said particular pressure to open said electric circuit, and
- e. means actuated when both said fast-acting switch and said slow-acting switch are closed to by pass said slow-acting switch.
Dependencies are inferred from the claim text.