Patent ID: 7954674
Filing Date: 2011-06-07
Classification: B05B

Abstract:
1. A pump for delivering a fluid product comprising: a tubular body extending along a central axis between a first end and a second end, delimiting internally a metering chamber and comprising an inlet orifice for the fluid product in the metering chamber in the vicinity of said first end, an inlet valve suitable for selectively closing off the inlet orifice, a stem mounted so as to be able to move axially inside the tubular body between a far position and a near position relative to the inlet orifice, said stem being returned elastically to the far position, said stem comprising an elongated axial actuation tube delimiting an outlet duct, an elongated insert assembled to the actuation tube and comprising a base placed inside the metering chamber and facing the inlet orifice, and an orifice for discharging the fluid product to the outlet duct, the insert comprising a rod which extends from the base, substantially perpendicularly to said base, said rod being placed in an open end of the actuation tube situated near to the inlet orifice, an annular piston mounted so as to slide axially inside the tubular body and on the stem, the piston and the base comprising annular surfaces suitable for coming into mutual contact and forming a discharge valve selectively closing off the discharge orifice, wherein the insert is movably attached to the actuation tube through a ball-and-socket joint arranged between the insert and the actuation tube, the insert being moveable with respect to the actuation tube in rotations about three orthogonal axes including the central axis, the rod of the insert comprising a free end attached in an articulated manner to the inside of the actuation tube, the insert comprising evenly distributed centering members which extend from the rod in the direction of an internal surface of the actuation tube with a transverse clearance arranged between each centering member and the internal surface of the actuation tube, an axial clearance being arranged between the insert and the actuation tube, the transverse and axial clearances being arranged to form the ball-and-socket joint.