Fluid handling – Inflatable article – With gauge or indicator
Reexamination Certificate
1999-12-21
2001-08-28
Buiz, Michael Powell (Department: 3753)
Fluid handling
Inflatable article
With gauge or indicator
C137S231000, C152S415000, C251S336000
Reexamination Certificate
active
06279599
ABSTRACT:
BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to an air hose assembly for a portable tire pump and having the dual function of air inflation and pressure release.
(b) Description of the Prior Art
In a conventional medium- or small-sized portable air pump for use in vehicles, the air hose assembly connected therewith works in a single direction, i.e., permitting air inflation only. With reference to
FIGS. 1 and 2
, an air hose assembly A
10
is shown to include an abutting rubber ring A
1
, a hollow core A
2
, an air nozzle screw sleeve A
3
, a tightening ring A
4
, and an air hose A
5
.
During inflation, an air nozzle cap on the tire is removed, and the air nozzle screw sleeve A
3
is screwably coupled to an outer screw sleeve of the air nozzle of the tire. At this time, insertion of the air nozzle screw sleeve A
3
will simultaneously pushed the hollow core A
2
to displace fowardly to directly press against an air core in the air nozzle of the tire. By means of the abutting rubber ring A
1
at the front end of the assembly to abut against the air core, the latter is caused to open, so that compressed air generated as a result of operation of a piston of the air pump is pumped into the tire via the air hose A
5
to inflate the tire.
During the process of inflation, the tire may be over-inflated inadvertently; the conventional air pump is generally provided with a pressure gage to indicate the pressure of the tire. In order to restore the pressure in the tire to a normal level, deflation to reduce tire pressure is required. To reduce the tire pressure, the user has to use a pointed object or his finger to press the air nozzle air core so that the pressure in the tire is released.
However, once the air hose assembly A
10
is removed from the tire, it is no longer possible to read the tire pressure. Therefore, it is not known whether a suitable tire pressure has been released. That is, the tire pressure may be below normal or still be above normal. If the pressure released is excessive, the tire will need to be inflated again. It the pressure released is too little, the tire pressure remains high, which will endanger road safety. Furthermore, the conventional method of releasing the fire pressure is very slow and inconvenient, and the use may hurt his fingers or damage the air nozzle of the tire during release of tire pressure.
SUMMARY OF THE INVENTION
A primary object of the present invention is to provide an air hose assembly for a portable tire pump and having the dual function of air inflation and pressure release, in which the same air hose structure is used to perform both air inflation and pressure release without the need to remove the air hose, and pressure can be released quickly to arrive at a normal level.
The foregoing objects and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.
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A & J
Buiz Michael Powell
Schoenfield Meredith H.
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