Pump having a membrane

Details Pump having a membrane Pump having a membrane

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 43/02 (2006.01) B05B 11/00 (2006.01)

Patent

CA 2154732

A miniature metering pump of the type possessing a body provided with an inlet of opening out into a metering chamber, associated with an inlet valve having a valve member, and with a piston having a plunger provided with an axial nozzle and flared at its bottom end to form a hood receiving a sealing gasket, its internal channel being associated with an outlet valve having a valve member, wherein said outlet valve member forms a portion of a single elastically deformable part that constitutes said gasket, shaped to have a bottom U-shaped ring assembled round the hood of tree plunger, and connected at the top: on the outside to a substantially cylindrical skirt for sealing and for returning the piston to its rest position, which skirt runs on from an annular flange for providing sealed connection with the body; and on the outside by a folded valve member that is generally conical or mitral-valve shaped, with a narrow top end carrying a cutout surrounded by a lip that opens to provide an outlet orifice.

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