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The oil buffer has been developed and built according to the state of the art and recognized technical safety regulations.

The exclusive intended and proper use of the oil buffers is to brake the elevator cabin / counterweight to a standstill after it has passed the last stopping point.

Functional principle: The oil buffer consists of a hollow cylinder filled with hydraulic oil and a ram moving up and down in this cylinder. A spring has been provided for keeping the ram in ready position when the car travels without load. When the damper is burdened the mass hitting on the ram presses the oil of the cylinder through the drilled holes in the cylinder wall into the enclosing external cylinder. The ram speed and consequently the deceleration are determined by the velocity of the oil flowing out of the internal cylinder. The number of drilled holes, their diameters and arrangement are coordinated in such a way that the average deceleration of the decelerated mass does not exceed the value „g“ (9.81m/s²) during braking. Consequently the car or the counterweight is stopped within the ram stroke and the required values are complied with.

Electrical monitoring: as soon as the buffer is compressed a mechanically operated monitoring switch is operated . It interrupts the safety circuit and thus disconnects normal operation. As soon as the buffer is relieved it is re-set into working position by the spring . The monitoring switch closes the safety circuit at the same time

The sliding friction buffer stop is designed to dissipate the impact energy in a controlled manner via the sliding action of the friction shoes fitted between the frame and rail profile. This can be used in conjunction with HTEGPL hydraulic energy absorption systems to provide a recoverable stroke for impacts up to 25 km/h and controlled sliding distances for high speeds