A BUFFER

摘要

A buffer (10) comprises a casing (11) defining a hollow container for hydraulic fluid; a hollow, hydraulic fluid reservoir adjacent to the container; a displacement member (18) extending between the exterior of the buffer and the interior of the reservoir via a first aperture (19) in the reservoir; and a spring (16) acting between the displacement member and the remainder of the buffer (10). The displacement member (18) is moveable inside the reservoir between a first position in which the displacement member (18) is relatively extended on the exterior of the casing (11); and a second position in which the displacement member (19) is relatively retracted, inside the reservoir, the spring (16) urging the displacement member (18) towards the first position. The reservoir includes one or more further apertures (28) via which on movement of the displacement member (18) from the first position to the second position hydraulic fluid flows from the reservoir to the container in a manner damping movement of the displacement member (18).