Fluent material handling – with receiver or receiver coacting mea – Fluent charge impelled or fluid current conveyed into receiver
Reexamination Certificate
2001-02-28
2002-05-07
Douglas, Steven O. (Department: 3751)
Fluent material handling, with receiver or receiver coacting mea
Fluent charge impelled or fluid current conveyed into receiver
C141S038000, C137S231000, 15
Reexamination Certificate
active
06382268
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an inflation device that has a first section air-tightly connected to the valve of an object to be inflated, and a second section independently accessing the seal pin in the valve.
BACKGROUND OF THE INVENTION
A conventional inflation device is shown in FIG.
1
and generally includes a head
11
having a tube extending from a rear end thereof and a passage
14
defined through the tube which is connected to a hose
10
of a pressurized air source. A threaded recess
15
is defined in a front end of the head
11
and a protrusion
13
extends from an inner side of the threaded recess
15
. A tiny path is defined through the protrusion
13
and communicates with the passage
14
. A seal
12
is mounted to the protrusion
13
. A valve
16
of an object to be inflated has a threaded portion which is engaged with the threaded recess
15
of the head
11
and a seal pin
160
in the center of the valve
16
is pushed by the protrusion
13
and opens the path in the valve
16
. The pressurized air enters into the valve
16
via the path opened by the seal pin
160
. When the pressure in the object reaches a desired level, the head
11
is unscrewed and separated from the valve
16
. The seal pin
160
then seals the path in the valve
16
again. However, during the separation of the head
11
and the valve
16
, because the seal pin
160
moves not yet to the close position, and the distal end of the valve
16
does not contact the seal
12
, the high pressure in the object will escape into the atmosphere via the path in the valve
16
. This generates an unsatisfied result, especially for the objects which require precise inflation such as the two cylinders of a bicycle or motorbike suspension system, the pressure of the cylinders is required to be precisely the same.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided an inflation device and comprises a first section having a threaded recess defined in a first end thereof and a flange extends radially inward from an inner periphery of the first section. A tunnel is defined through the flange and communicates with the threaded recess. A seal is received in the threaded recess and contacts an end of the flange. A second section has an insertion which extends through a second end of the first section and is movably engaged with the tunnel. An end member is connected to the insertion and a path is defined through the end member. A passage is defined through the second section and communicates with the path. The end member is movably inserted in the threaded recess.
The primary object of the present invention is to provide an inflation device that avoid leakage from the valve of an object to be inflated when removing the inflation device from the valve.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
REFERENCES:
patent: 4165760 (1979-08-01), Guenther
patent: 5016668 (1991-05-01), Nicolino et al.
patent: 6279599 (2001-08-01), Chen
Baxley Charles E.
Douglas Steven O.
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