Spring loaded cylinder

Abstract

A spring storage cylinder, for the generation of braking forces for the auxiliary and parking brake effect, comprises a piston, arranged in a housing, which may be displaced for the operation of a brake lever. The piston is pretensioned against the brake lever by a spring. A release spindle is provided, by which the piston may be moved from an extended position, operating the brake lever, in the braking position, against the force of a spring into a withdrawn position, releasing the brake. A primary chamber is provided in the housing, pressurized to a certain pressure, in which, when an operating pressure is exceeded, the piston is moved into the withdrawn position against the pressure of the spring. At least one contact switch is provided to determine the position of the piston in the housing. The operating status of the spring storage cylinder may be monitored by the contact switch(es), the storage function and the release function controlled and any damage to the storage spring determined.

Dependencies are inferred from the claim text.