Vertical metering pump having piston biasing elastomeric gasket

Details Vertical metering pump having piston biasing elastomeric gasket Vertical metering pump having piston biasing elastomeric gasket

1995-08-10

1996-05-21

Koczo, Michael

Pumps

Expansible chamber type

Having means for holding pressure responsive distributor open

417480, 417550, 92130B, 2223213, 2223219, 222341, F04B 700, F04B 5316, F04B 914

Patent

active

055183778

ABSTRACT:
A miniature metering pump of the type possessing a body provided with an inlet 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 the 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 inside 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.

REFERENCES:
patent: 3359917 (1967-12-01), Cooprider
patent: 3406909 (1968-10-01), Pfeiffer
patent: 4347953 (1982-09-01), Bauer
patent: 4452379 (1984-06-01), Bundschuh
patent: 4991747 (1991-02-01), Van Brocklin
patent: 5238156 (1993-08-01), Andris

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