Safety device for vehicle brakes

Claim 1

A SAFETY VEHICLE BRAKE SYSTEM COMPRISING A HYDRAULIC SERVICE BRAKE INCLUDING A MASTER CYLINDER A MECHANICAL EMERGENCY BRAKE, A SECONDARY PNEUMATIC CYLINDER, A PISTON SLIDABLY LOCATED WITHIN THE SAID PNEUMATIC CYLINDER, A PISTON ROD CONNECTED TO SAID PISTON, SAID PISTON ROD PASSING THROUGH A FIRST END OF SAID PNEUMATIC CYLINDER IN SEALABLE SLIDABLE CONTACT THEREWITH, A BRAKE PEDAL FOR SELECTIVE OPERATION OF SAID SYSTEM, A SECOND END OF SAID PISTON ROD BEING CONNECTED TO SAID BRAKE PEDAL, A SUBSTANTIALLY CENTRALLY PIVOTED LEVER HAVING A FIRST END AND A SECOND END, SAID FIRST END OF SAID LEVER BEING IN RELEASABLE ENGAGEMENT WITH A SECOND END OF SAID PNEUMATIC CYLINDER, SAID SECOND END OF SAID LEVER BEING IN OPERABLE RELATIONSHIP WITH SAID EMERGENCY BRAKE, AND EMERGENCY BRAKE HANDLE, UNI-DIRECTIONAL CONNECTION MEANS BETWEEN SAID EMERGENCY BRAKE HANDLE AND SAID EMERGENCY BRAKE, SAID MASTER CYLINDER AND SAID PNEUMATIC CYLINDER BEING INTERCONNECTED THROUGH SAID PEDAL TO PERMIT SAID MASTER CYLINDER TO ACTUATE SAID SERVICE BRAKE SYSTEM DURING NORMAL CONDITIONS WITHOUT SIAD EMERGENCY BRAKE SYSTEM BEING ACTUATED, YET TO PERMIT SAID EMERGENCY BRAKE SYSTEM TO BE ACTUATED UPON SUBSTANTAILLY FULL DEPRESSION OF SAID PEDAL UPON FAILURE OCCURING IN SAID HYDRAULIC SERVICE BRAKE; SAID PNEUMATIC CYLINDER INCLUDING A ONE-WAY VALVE NEAR SAID SECOND END THEREOF WHEREBY AIR IS PREVENTED FROM ESCAPING THEREFROM, THEREBY PROVIDING RESISTANCE TO THE OPERATION OF SAID PEDAL WHEREBY SUDDEN STOPPAGE OF SAID VEHICLE IS PREVENTED.