초록 ▼

In the braking systems of many vehicles, a parking brake is utilized that is spring applied and fluid pressure released. In the event of a mechanical breakdown, a mechanical device or other specialized tools must be used to bring about the disengagement of the parking brake so that the vehicle may b

In the braking systems of many vehicles, a parking brake is utilized that is spring applied and fluid pressure released. In the event of a mechanical breakdown, a mechanical device or other specialized tools must be used to bring about the disengagement of the parking brake so that the vehicle may be towed. The present invention overcomes this problem by providing an auxiliary actuating mechanism for a spring applied, fluid pressure released parking brake that includes an auxiliary accumulator that will maintain a preselected amount of pressure upon the loss of the primary source of pressure. An auxiliary actuating valve is positioned between the accumulator and the parking brake to selectively communicate fluid therebetween. The auxiliary actuating mechanism is provided with two remotely located actuators that may be utilized to selectively position the valve to permit the communication of the pressurized fluid within the accumulator with the parking brake assembly to achieve the disengagement thereof.

대표청구항 ▼

In a vehicle having a brake system that includes a brake assembly of the type that is spring applied and fluid pressure released, and a primary means for actuating said brake assembly under normal operating conditions, including a fluid reservoir, a source of pressurized fluid, and a valve means tha

In a vehicle having a brake system that includes a brake assembly of the type that is spring applied and fluid pressure released, and a primary means for actuating said brake assembly under normal operating conditions, including a fluid reservoir, a source of pressurized fluid, and a valve means that selectively directs the pressurized fluid between the brake assembly and the fluid reservoir, an auxiliary actuation mechanism adapted to be mounted to said vehicle, comprising: an accumulator; a valve means having a first position wherein fluid is communicated between the accumulator and the brake assembly to cause the disengagement thereof and a second position wherein fluid is communicated between the brake assembly and the fluid reservoir to allow engagement of the brake assembly; an actuating lever pivotally mounted to the vehicle and being positioned adjacent the valve means and connected thereto; a pair of bellcranks pivotally mounted to the vehicle on opposite sides of the actuating lever, each bellcrank having a first arm connected with a distal end portion of the actuating lever and a second arm; and means for actuating said valve means connected to the second arms of the respective bellcranks, said actuating means being separate from the primary actuating means having at least two remote locations from which said valve means may be actuated between said first and second positions.