(under subclass 561) Systems comprising a liquid flow passage between the master cylinder and the brake or slave cylinder, including means in the line to control the flow of fluid between said cylinders.
(1) Note. This is essentially a residual subclass for systems not provided for in Class 303, Fluid-Pressure and Analogous Brake Systems, and Class 60, Power Plants, subclasses 54.5+, and consists principally of flow control means, generally termed "hill holders", which trap a column of liquid in the brake line to maintain the brake cylinder in its expanded position with the brakes engaged, together with means to permit an increase in the volume of the trapped liquid to intensify the braking effort.
SEE OR SEARCH CLASS
303, Fluid-Pressure and Analogous Brake Systems, appropriate subclasses for braking systems of the fluid pressure type. See (1) Note.
