Dispensing – Outlet element operated by pressure of contents – Spring form – resilient or compressible flow controller or...
Patent
1994-04-04
1995-09-05
Kashnikow, Andres
Dispensing
Outlet element operated by pressure of contents
Spring form, resilient or compressible flow controller or...
222341, 222507, 222527, 23953313, 239DIG12, B65D 572
Patent
active
054472580
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a spout for a liquid pump. More particularly, this invention relates to a spout in which an outlet is closed to prevent contents from getting dry when the spout is not in use.
One spout, which is mounted onto an outlet of a liquid pump and closed to prevent its contents from getting dry when the spout is not in use, is described in Japanese Utility Model Publication No. 21367/1976.
As shown in FIG. 2, such a conventional spout is formed with a pipe 132 extending from a base 131 that provides a passage 130 inside and an end of the pipe 132 that is closed by a tap 133. A hole 134 is provided on a side surface near the end of the pipe 132, which enables the passage 130 to communicate with the outside. A cap 135 is provided on the end of the pipe 132 so as to close the hole 134. Further, a spout 136 is provided in an end of the cap 135. When the contents are supplied through the passage 130 by a pump not shown, the inside of the cap 135 is pressurized through the hole 134 and is expanded. Thereby, the content of the pipe are sent through the hole 134 between the pipe 132 and the cap 135 and ejected outwardly from the spout 136. When it is not in use, because the cap 135 and the pipe 132 are closely fitted, the contents are isolated from the open air.
FIG. 3 shows a fixed ring 137 provided circumferentially on a cap 135 so as to strengthen the fixation of the cap 135 to the pipe 132, and FIG. 4 shows its motion (i.e., during dispensing).
FIG. 5 shows a passage 230 within a pipe 232 forming a trigonal pyramid at an end, accordingly, a hole 234 is aslant.
In the conventional spout described above, however, because a cap 135 and a pipe (132 and 232) are closely fitted when the pump is not in use, the contents tend to work as glue, which prevents easy operation of the spout.
In the conventional spout shown in FIGS. 3 and 5, in addition to the foregoing problems, the spout tends to be complicated and troublesome to manufacture because a fixed ring 137 and 237 must be provided.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a spout for a liquid pump, of which assembly is easy and the closing motion is smooth and accurate.
To achieve the object described above, the present invention provides a spout for a liquid pump, comprising: a first valve constitutive body mounted onto an outlet of a liquid pump, providing a bottom part which has a flowing hole with a cylinder body, and being formed with a shaft extended from the bottom; an engaging part being formed to be engaged to the cylinder body of the first valve constitutive body; and a second valve constitutive body, which is extended from the engaging part, providing a cylindrical body having a smaller diameter at an end so as to form an end opening part of the cylindrical body to fit onto the shaft.
In the above spout, the second valve constitutive body may be formed out of flexible synthetic resin to provide resiliency to the cylindrical body. In the above spout, it is easy to assemble the spout closed constantly because it can be constituted by fitting the second valve constitutive body into the first valve constitutive body. In addition, in the inventive spout, the end opening part of the cylindrical body may be fitted outwardly to the shaft when it is not in use, that is, the inside of the liquid pump is airtight when not in use. On the other hand, pressing an outlet of the liquid pump makes the end opening part of the cylindrical body slightly open, which discharge the contents. In the above spout, at this time, a contact area of the shaft and the end opening part of the cylindrical body is limited to nearly a circular line, which prevents the jamming of the content and makes the opening and closing motion easy and accurate in comparison with conventional spouts which have problems because the shaft and the opening of the end of the cylindrical body are closely fitted with a large area.
Other features and advantages of the present invention will become apparent
REFERENCES:
patent: 5033647 (1991-07-01), Smith et al.
patent: 5163588 (1992-11-01), Cater
patent: 5192006 (1993-03-01), van Brocklin et al.
Kashnikow Andres
Kaufman Joseph A.
Yoshino Kogyosho Co. Ltd.
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