Dispensing – Nozzles – spouts and pouring devices – With separable attaching means
Reexamination Certificate
2003-04-10
2004-08-31
Jacyna, J. Casimer (Department: 3751)
Dispensing
Nozzles, spouts and pouring devices
With separable attaching means
C222S402100, C222S566000, C239S337000
Reexamination Certificate
active
06783037
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to the field of aerosol spray cans. More specifically, the invention comprises a revised extension tube that locks to the spray cap when in use.
2. Description of the Related Art
Aerosol spray cans tend to deliver a diffused spray. In some applications, such as the precise deposition of lubricants, this diffused pattern is undesirable. Where precise application is needed, an extension tube has customarily been used.
FIG. 1
shows a prior art aerosol can
10
. To dispense its contents, the user pressed down on spray cap
12
. A diffused spray pattern then issues from orifice
16
. Extension tube
18
, which is simply a long hollow piece of plastic, can be inserted into orifice
16
. In some prior art devices, orifice
16
is contained within nozzle insert
14
. Gripping features, such as small ribs or pliable materials, can be included within nozzle insert
14
. These help frictionally retain the portion of extension tube
18
that is thrust into orifice
16
. However, those skilled in the art will know that this frictional retention approach is only marginally effective. The contents of aerosol can
10
issue forth under considerable pressure. They may also have significant lubricating value. These two factors degrade the prior art devices' ability to retain extension tube
18
in position. In fact, it is not uncommon for an extension tube
18
to be launched out of spray cap
12
like a projectile.
BRIEF SUMMARY OF THE INVENTION
The present invention comprises a modified spray cap and extension tube. Positive mechanical interlocking features are added which lock the extension tube to the cap. The extension tube therefore does not fly out of the cap when in use. The modified spray cap is configured so that a conventional diffused spray pattern is still achieved when the modified extension tube is removed.
REFERENCES:
patent: 2908446 (1959-10-01), Strouse
patent: 3116856 (1964-01-01), Prussin et al.
patent: 3186645 (1965-06-01), Eberlein
patent: 3472457 (1969-10-01), McAvoy
patent: 4991750 (1991-02-01), Moral
patent: 5065909 (1991-11-01), Pino et al.
patent: 5242079 (1993-09-01), Stephens et al.
patent: 5297704 (1994-03-01), Stollmeyer
patent: 5307964 (1994-05-01), Toth
patent: 5423458 (1995-06-01), Tourigny
patent: 5788129 (1998-08-01), Markos
patent: 5873497 (1999-02-01), Broadus
patent: 5921446 (1999-07-01), Stern
patent: 6253971 (2001-07-01), Cobb
Horton John Wiley
Jacyna J. Casimer
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