Dispensing – With material treatment or conditioning means
Patent
1997-07-16
1999-05-25
Douglas, Steven O.
Dispensing
With material treatment or conditioning means
2223217, 2221813, B65B 104
Patent
active
059062991
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a soap foam dispenser having a storage container for a soap solution, a metering pump for the soap solution, an air pump for the feed of foaming air, and a movable actuating lever for simultaneous actuation of both pumps.
A soap foam dispenser of that kind is to be found for example in EP-A-19 582. A hand lever which is arranged beneath the dispenser and which is to be pulled towards the user is pivotably connected to the pistons of the two pumps, the piston of the metering pump being displaced horizontally and the piston of the air pump being displaced vertically.
Now the object of the present invention is to improve the actuating mechanism of the two pumps and for that purpose the invention proposes that the two pumps have pistons which are arranged in mutually parallel relationship and the actuating lever is movable in the direction of displacement of the two pistons. That arrangement therefore eliminates the actual hand lever and the coupling elements connecting it to the two pump pistons and the overall structure is simplified.
SUMMARY OF THE INVENTION
In a preferred embodiment, touching the device with the hands when they have not yet been cleaned can be avoided by the actuating lever being formed by a movable housing cover. The housing cover represents a sufficiently large operating element which can be actuated not only by hand but also with the back of the hand, the forearm, the elbow etc.
Preferably the housing cover is suspended pivotably about a horizontal axis and the two pistons are displaceable horizontally. The two pumps are preferably arranged in mutually superposed relationship, while the length of the travel of at least one piston can be adjustable.
Preferably the air pump is arranged between the storage container and the metering pump. That requires a communication between the storage container disposed above the air pump and the metering pump disposed beneath the air pump. A particularly advantageous arrangement is afforded in that respect if a communicating tube between the storage container and the metering pump forms an abutment for the piston of the air pump. If the piston of the air pump is subjected to the force of a return spring, the communicating tube limits in particular the return travel. Irrespective of a return spring the communicating tube can also serve as an abutment for both piston travels if the piston has a piston plate and, at a spacing relative thereto, an actuating head, and the communicating tube is passed through between the piston plate and the actuating head.
Use of the communicating tube between the storage container and the metering pump as an abutment for the piston travel of the air pump is moreover not limited to use of the housing cover as a common actuating element but could also be employed in relation to other actuating elements, for example by way of a hand lever.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in greater detail hereinafter with reference to the Figures of the accompanying drawing in which:
FIG. 1 is a view in vertical section through a soap foam dispenser, and
FIG. 2 is a view in horizontal section through the air pump.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The soap foam dispenser has a housing 1 which can be fixed for example to a wall and on which a cover 2 is arranged pivotably about an upper horizontal axis 3. Soap foam issues from a lower outlet 20 provided on a foaming chamber 7 in which air is added to the liquid soap and the air and the soap are mixed. The liquid soap flows from an in particular interchangeable storage container 15 arranged in the upper part of the housing 1 by way of a communicating tube 12 into a collecting space 6 and is introduced from same by means of a metering pump 4, in the respectively desired amount, into the foaming chamber 7. The air required for foam production purposes is produced by means of an air pump 8 from which an air conduit 14 communicates with the foaming chamber 7 which includes a non-return
REFERENCES:
patent: 3580863 (1971-05-01), Campbell et al.
patent: 4349131 (1982-09-01), Arabian
patent: 5169029 (1992-12-01), Behar et al.
patent: 5445288 (1995-08-01), Banks
patent: 5570819 (1996-11-01), Uehira et al.
Douglas Steven O.
Hagleitner Betriebshygiene GES.M.B.H. & Co. KG
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