Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improved Retractable Bollard
This invention relates to a retractable bollard including an embedded outer housing having an open end and a closed end; a ram slideably mounted within the outer housing; and means for injecting fluid into, and means for removing fluid from, a chamber within the retractable bollard to move the ram relative to the outer housing between a retracted position and an extended position. The chamber is bounded by one or more sliding surfaces and one or more seals configured to move in sealing relationship relative to the sliding surfaces and the ram is able to be completely removed from the outer housing without separating the seals from the sliding surfaces.
Improved Retractable Bollard
This invention relates to a retractable bollard including an embedded outer housing having an open end and a closed end; a ram slideably mounted within the outer housing; and means for injecting fluid into, and means for removing fluid from, a chamber within the retractable bollard to move the ram relative to the outer housing between a retracted position and an extended position. The chamber is bounded by one or more sliding surfaces and one or more seals configured to move in sealing relationship relative to the sliding surfaces and the ram is able to be completely removed from the outer housing without separating the seals from the sliding surfaces.
Improved Retractable Bollard
BROADHURST ROBERT CHARLES (Autor:in)
28.07.2016
Patent
Elektronische Ressource
Englisch
IPC:
E01F
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
,
Zusätzliche Baumaßnahmen, wie die Ausstattung von Straßen oder die bauliche Ausbildung von Bahnsteigen, Landeplätzen für Hubschrauber, Wegweisern, Schneezäunen oder dgl.