Patent ID: 6343916
Filing Date: 2002-02-05
Classification: B05B,F04B,Y10T

Abstract:
A pump of the type comprising a substantially cylindrical body (1) in one piece provided, in its lower part, with a port (11) for admission of the product and with a valve constituted by a cavity (10) containing an element (2) capable of moving between a lower stop position (12b) corresponding to the obturation of said admission port (11) and an upper stop position (12a) corresponding to the opening of said port (11) and that is defined by at least one discontinuous internal projection (120) whose lowerface (120b) partly closes said cavity and whose upperface (120a) is topped, outside said cavity, with an at least partly cylindrical cut-out (13) whose generatrices are parallel to the axis of the body (1), and wherein said projection (120) defines an inner edge (120c) the generatrices of which are substantially parallel to the axis of the body (1) and which defines, at the junction of the lower face (120b)with the mobile element (2) a line contact in the upper stop position enabling avoidance of any jamming or sliding of said element outside the cavity (10).