US 5,429,275 AGranted

Dispenser of doses of liquids and paste-like masses

OwnerOtto Katzinventor

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Abstract

A dispenser for the metered discharge of liquids and in particular pasty masses, having a delivery pump actuatable by finger pressure. The pump has a vacuum-type action and a restoring spring and pressure and suction valves. The container to which the pump is to be attached preferably is a container having resilient walls. The pump has a discharge bore with a closure element, to open and close the discharge bore. The pump has a pump chamber that is open and closed at its top end by a pressure valve. The pressure valve is connected to a plunger. A suction valve is axially spaced from the pressure valve and the suction valve is positioned to open and close the bottom end of the pump chamber. Contact zones are provided between the suction valve and the pressure valve. The plunger is displaceable in the delivery direction, and a restoring spring is located outside of the pump chamber. The restoring spring is clamped between a shoulder surrounding the pump chamber and a plunger flange. A sliding guidance is connected with a metering head. The guidance has a circumferential edge that acts as a stop and there is a closure element movable in the discharge bore by a lever key connected thereto.

Claims31

Dependent claims

A finger actuatable dispenser for the metered discharge of liquids and pasty masses from a container comprising:

connecting means to connect said dispenser to said container,
a dispenser housing,
a delivery pump connected to said housing and axially movable within said housing,
said delivery pump having a discharge bore, a pump chamber (12), a pressure valve (17) to open and close one end said pump chamber, a plunger (13), a seal (14) connected to one end of said plunger, a suction valve (6) connected to the other end of said pump chamber to open and close another end of said pump chamber, said suction valve (6) and pressure valve (17) being axially spaced from each other, said suction valve having means for limiting axial movement within said pressure chamber,
open and close means (40, 52) in said dispenser to open and close said discharge bore,
a restoring spring (35) connected to said plunger and supported on a shoulder within said dispenser to urge said plunger to a non-delivery position,
said delivery pump having a stop (31) on its outer surface to cooperate with a dispenser housing stop (32) to limit the relative axial movement of said delivery pump and said plunger,
said pressure valve contacting said suction valve to reduce said pump chamber to a minimum volume, said pressure valve cooperating with said seal to close said pump chamber one end when the plunger is moved to increase the volume of said pump chamber.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/167,995Filed 21 Dec 1993
Priority: DE 41 21 834.52 Jul 1991
Granted: 4 Jul 1995
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

B05B 11/0072
Outlet valves actuated by the pressure of the fluid to be sprayed: a valve member forming part of an outlet opening
B05B 11/0005
Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use: components or…
B05B 11/0064
Outlet valves actuated by the pressure of the fluid to be sprayed: lift valves
B05B 11/0075
Outlet valves actuated by the pressure of the fluid to be sprayed: two outlet valves being placed in a delivery conduit, one downstream the other