B - Operations – Transporting – 28 – C
Patent
B - Operations, Transporting
28
C
B28C 7/16 (2006.01) B28B 13/02 (2006.01)
Patent
CA 2253247
An apparatus to feed a constant flow of concrete comprises two hydraulic cylinder-piston units (2, 3), acting alternately so as to operate two corresponding pistons (22, 23) feeding the concrete to a concrete delivery pipe (17) through a commutating valve (6), and a proportioning device to feed the additives having to be added to the concrete. The device proportioning the additives consists of a pump (5), which is operated by a hydraulic motor (4) driven by a hydraulic circuit derived from the main hydraulic circuit operating said cylinder-piston units (2, 3). Said derived hydraulic circuit consists of a circuit which connects said hydraulic motor (4) to the exhaust chambers of the cylinders of said cylinder-piston units (2, 3) through a valve system (20) apt to "rectify" the hydraulic flow.
Appareil destiné à délivrer un flux constant de béton, qui comprend deux unités hydrauliques (2, 3) cylindre-piston agissant en alternance de manière à faire fonctionner deux pistons correspondants (22, 23) qui acheminent le béton dans un conduit (17) d'apport de béton par une vanne de commutation (6), et un dispositif doseur destiné à délivrer les additifs devant être ajoutés au béton. Le dispositif destiné à doser les additifs est constitué d'une pompe (5) actionnée par un moteur hydraulique (4) entraîné par un circuit hydraulique dérivé du circuit hydraulique principal faisant fonctionner lesdites unités (2, 3) cylindre-piston. Ce circuit hydraulique dérivé comporte un circuit qui relie le moteur hydraulique (4) aux chambre d'échappement des cylindres des unités (2, 3) cylindre-piston par l'intermédiaire d'un système (20) de valves capable de "rectifier" le flux hydraulique.
Arpini Roberto
Fraccapani Ivano
Moretti Giorgio
Cifa S.p.a.
Robic
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