Dispenser for flowable media
AssigneeIng. Erich Pfeiffer GmbH
InventorsLothar Graf, Karl-Heinz Fuchs
Life of this patent
Estimating the term…
Abstract
A dispenser or delivery apparatus for flowable media, particularly very viscous or gel-like media, has a dosing chamber body (38) located within the stored medium and the body (38) moves backwards and forwards over part of the pump stroke of the pump piston (10) of a thrust piston pump (8). Body (38) defines the piston bath (53) for pump piston (10) surrounding pump chamber (59) and the valve body (48) of an intake valve (47) for pump chamber (59). Accompanied by reliable filling of pump chamber (59) and small piston paths, this leads to a very accurate dosing of the medium quantity discharged per piston stroke.
Claims27
A dispenser for flowable media comprising:
- a thrust piston pump (8) having a casing (3);
- a pump piston (10) having a means to be displaceably guided on a piston path (53) of a pump cylinder over a pump stroke and a return stroke between a starting position and a pump stroke end position;
- a pump chamber (59) formed by the pump cylinder, the pump chamber being connected to a discharge opening (20) of said dispenser, so that the flowable media flows within the pump chamber and a discharge duct during discharge of the flowable media;
- a media inlet (39) issuing into said pump chamber (59) and being closed during the pump stroke and open in at least one position of the return stroke of said pump piston (10),
- wherein the means to be displaceably guided on a piston path (53) is defined by a dosing chamber body (38) surrounding said pump chamber (59), said dosing chamber body (38) being movable commonly with said pump piston (10) with respect to said casing (3), in driving directions between two end positions, said dosing chamber body closing the media inlet (39) during relative movement of the pump piston (10) in the dosing chamber body during the pump stroke.
Dependencies are inferred from the claim text.