公开(公告)号：WO2018109692A1

公开(公告)日：2018-06-21

申请号：PCT/IB2017/057902

申请日：2017-12-13

Applicant: TFM ENGINEERING S.R.L.

Inventor： MARCHIONNI, Mauro ,  BONIFAZI, Raffaele ,  BASILE, Fabio ,  MARCOLIN, Stefano ,  TRANI, Antonio ,  DEMITRI, Luigi

IPC: F04B1/047 ,  F04B1/06 ,  F04B1/34 ,  F04B49/03 ,  F04B49/22 ,  F04B49/06 ,  F02M59/06

Abstract: Pump (1) comprising a first hollow cylindrical body (2) therein containing: a second hollow body (11) with a cylindrical outer profile and internally shaped in a cam-like manner, the second hollow body (11) being associated to drive means for the rotation thereof around a rotation axis (X); a plurality of pumping elements (10a, 10b, 10c) obtained inside a central fixed body (31). Each of the pumping elements (10a, 10b, 10c) has: a first cylinder (4) defining a chamber within which there is slidably coupled a piston (5) moving with reciprocating motion inside the first cylinder (4), the piston (5) having a housing for a plunger (6) coupled to the piston (5) and such to follow the reciprocating motions of the piston (5) within a second cylinder (7) which suctioningly receives the fluid coming from an external tank through a first duct (8), the plunger (6) causing the delivery outflow of the compressed fluid through the first duct (8) according to a direction opposite to the suctioning direction; a second duct (9) which places the first duct (8) of each pumping element (10a, 10b, 10c) in communication with an external point of delivery; a pressurisation check valve (13) present in the second duct (9). The pump has, connected to the second duct (9) upstream of the pressurisation valve (13), at least one valve for adjusting the fluid flow rate actuatable to at least partly discharge the fluid coming from the pumping elements (10a, 10b, 10c).