Coating implements with material supply – Supply container and independent applicator – Applicator provided with material receiver
Reexamination Certificate
2000-09-28
2001-10-02
Walczak, David J. (Department: 3751)
Coating implements with material supply
Supply container and independent applicator
Applicator provided with material receiver
C222S402130, C401S130000, C401S190000, C401S191000, C401S204000, C401S207000
Reexamination Certificate
active
06296410
ABSTRACT:
The present invention relates to a device for administering a quantity of liquid cooling agent, comprising:
a container for holding the fluid coolant;
a normally closed valve connected to the container; and
operating means for temporarily opening the valve.
Such a device is known from the patent publication EP-B-0 608 954.
In this known device use is made of a thin pipe which is connected to the valve and which is provided on its free end with a foamed porous body. The pipe debouches into the interior of the foamed body.
Such a device is applied for instance in the removal of warts. A quantity of cooling agent applied to the administering element is herein pressed onto the wart, whereafter this latter freezes and disappears. This method is generally known per se; it is performed by general practitioners using liquid nitrogen.
During use of this known device the valve is depressed and cooling agent enters the interior of the foamed body via the valve and the pipe. Inside the foamed body the cooling agent must then move toward the outside in liquid or gaseous form. This results in a reduced effectiveness; the cooling agent must after all spread inside the foamed body, so that only a part of the cooling agent reaches the location where the foamed body comes into contact with the wart.
The object of the present invention is to provide such a device wherein the above stated drawbacks are obviated.
This object is achieved by positioning means for positioning at least a part of the administering element so that cooling agent leaving the valve can reach the administering element.
By means of this measure the greater part of the cooling agent leaving the valve reaches that part of the administering element which comes into contact with the wart, so that it is used effectively.
According to a first preferred embodiment the positioning means comprise a chamber which is connected to the valve and into which the cooling agent is carried when the valve is operated, which chamber is adapted for placing of at least a part of the administering element.
It will be apparent that this embodiment results in a particularly effective administration; the cooling agent is able to spread inside the chamber and can exit to the outside only with difficulty.
An even more attractive embodiment is obtained when the operating means are only coupled to the valve when the administering element is placed in the cavity. This measure results in the operating means only being effective when an administering element is placed in the cavity. This means that the valve cannot be operated without administering element, thus preventing for instance children spraying the cooling agent, with the dangers this involves.
Another advantage is that only when an administering element is placed in the correct manner can this administering element be wetted with the cooling agent. This also improves the effectiveness.
According to yet another embodiment the operating means are integrated into the chamber and the operating means are activated when an administering element is placed in the chamber.
According to a specific embodiment hereof the chamber is placed with its shaft directly onto the valve and the direction of movement of the administering element to be moved into the chamber corresponds with the operating direction of the valve.
REFERENCES:
patent: 3818911 (1974-06-01), Fournier
patent: 4969854 (1990-11-01), Katsuda et al.
patent: 5340031 (1994-08-01), Neuhaus et al.
patent: 5516505 (1996-05-01), McDow
patent: 5567073 (1996-10-01), De Laforcade et al.
patent: 5573340 (1996-11-01), Gueret
patent: 5597255 (1997-01-01), Yager et al.
patent: 5899623 (1999-05-01), De Laforcade
patent: 0608954 (1994-08-01), None
patent: 2422564 (1979-11-01), None
patent: 1008391 (1998-03-01), None
Information Leaflet Wartner “Wrattenverwijderaar” (XP-002107834) (undated).
Banner & Witcoff , Ltd.
Prunner Kathleen J.
Walczak David J.
Wartner B.V.
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