Abstract: A two-stage air compressor unit having an intercooler and aftercooler placed in side by side relationship to form an integral unit which is cooled by forced air blown by a motor driven fan and which has the inlet and outlet parts located in such a manner that little, if any, heat transfer occurs between the intercooler and the aftercooler so that greater cooling efficiency is realized.

Abstract: A spring brake assembly having a body portion in which a piston is mounted for reciprocal movement. A piston guide means engages a stem portion of the piston and an end of the body portion. A brake spring is caged between an inner surface of a face portion of the piston and an end of the body portion. Engageable at one end thereof with the stem portion of the piston is a pushrod which also extends coaxially out of the end of the body portion. A clutch including control and operating devices is provided.

Abstract: A system for removing moisture from compressed air in pneumatic brake equipment including an air compressor having an outlet pneumatically connected to an inlet of a cooler. The cooler having an outlet pneumatically connected to a pair of electromagnetic multi-way valves. Each of the valves includes a supply section and an exhaust section. A pair of drying cylinders have inlets selectively pneumatically connectable to the supply and exhaust sections of the respective pair of electromagnetic multi-way valves. An air reservoir has its inlet pneumatically connected to the outlets of the drying cylinders via a respective check valve. A governor is pneumatically connected to the air reservoir for sensing the pressure level in the air reservoir.

Abstract: A sensing means is provided to indicate an operating condition of a spring brake cylinder assembly in which such operating condition may be one of a brake applied and a brake release position. The sensing means engages a clutch control mechanism which includes means to engage the sensing means at different locations to make a determination of such operating condition.

Abstract: A spring brake cylinder assembly in which a pushrod connectable to a brake assembly is extendable from an end of such cylinder housing the piston member. The spring brake cylinder further includes a clutch release mechanism for manually releasing the brake force being applied.

Abstract: The invention taught herein is for an electrically-operated air compressor unit in which the motor and the air compressor are hung under the floor of the railroad car perpendicular to the floor in series, so that the required space under the floor of the railroad car is only the space occupied by the motor, and the space of the air compressor can be eliminated.

Abstract: A spring brake cylinder assembly having a spring-biased piston positioned therein. A pushrod is engaged with the piston through a clutch, which clutch includes both a clutch control device and a clutch operating mechanism that can manually release a brake application being applied by the assembly.

Abstract: This invention provides a pneumatic system moisture-removal apparatus wherein an end surface of an absorbent body is formed as a conical shape. The apparatus includes an end plate approximately perpendicular to the axial direction of the absorbent body fixed on the top portion of the end surface of the cone. A narrow space is located between the end plate and the conical-shaped end surface which serves as a passageway for compressed air. Compressed air is supplied to the apparatus from an outside circumference of the absorbent body to the center in a radial direction. The moisture-removal apparatus includes a honeycomb-type cylindrical absorbent body having a plurality of apertures. Compressed air is communicated into one end surface of the absorbent body in an axial direction. Moisture is extracted as the air passes through the apertures and is discharged from the opposite end surface of the absorbent body.

Abstract: An air compressor pressure adjustment device designed such that any values between two set points are determined and used as first and second standard values. When the air pressure in the reservoir decreases to the first standard value the air compressor is driven at a low speed. When the air pressure increases in the reservoir and reaches an upper limit set point the compressor is turned off. When this air pressure decreases to less than the lower limit set point, the air compressor is started once more.

Abstract: This invention relates to a novel electronic system for controlling a twin-type of air dryer arrangement. Normally, the adsorption elements (DR1) and (DR2) change over their adsorptive and regenerative cycles alternately by an "ON" signal produced by a governor (GO). In addition, in case that the compressor works continuously for a long period of time, the adsorptive and regenerative cycles are changed over whenever a predeterined time elapses. Thus, it is possible to make the entire air dryer more compact, to have less changeover operation and to use the relevant devices for much longer time.

Abstract: A compact, balanced and lightweight air compressor unit for a railroad vehicle which includes a motor-driven compressor, a suction strainer and suction silencer. The compressor and motor are interconnected by an intermediate hollow flanged mounting member which has a cross-sectional dimension that is smaller than the cross-sectional dimension of the motor and compressor. The suction strainer is located in a space between the motor and compressor and is attached to one side of the intermediate hollow mounting member while the suction silencer is located in a space between the motor and compressor and is attached to the other side of the intermediate hollow mounting member to form a substantially balanced structure which is suspended to the underside of the floor of the railroad vehicle by a plurality of resilient bumper connectors.

Abstract: A dehumidifier for use in a compressed air system between an air compressor and a storage reservoir for removing moisture from the compressed air supplied to the storage reservoir. The dehumidifier is provided with a moisture-collecting chamber connected to a conventional drain valve which operates automatically periodically for draining the moisture from the moisture-collecting chamber. A high speed fan is installed adjacent the moisture-collecting chamber for subjecting the compressed air passing therethrough to centrifugal force, thereby removing moisture and other foreign particles contained in the compressed air, such moisture being forced by gravity to the bottom of the collecting chamber.

Abstract: A brake pressure control device for use on vehicles equipped with air springs for proportioning the braking pressure delivered to the brake cylinders at a preselected ratio relative to the vehicle load as reflected by the prevailing air spring pressure, and including adjustable spring and lever mechanism for varying the proportioning ratio of the control device in accordance with the respective varying weights and load capacities of various vehicles, so that the control device may be used on a wide range of vehicles and adjusted to provide the desired pressure ratio.