Air valve connection head of hand-held air pump

Details Air valve connection head of hand-held air pump Air valve connection head of hand-held air pump

2000-04-24

2001-12-11

Rivell, John (Department: 3753)

Fluid handling

Inflatable article

With coupling means

C137S223000, C417S511000

Reexamination Certificate

active

06328057

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates generally to a hand-held air pump, and more particularly to an air valve connection head of the hand-held air pump.
BACKGROUND OF THE INVENTION
There are a variety of hand-held air pumps for bicycle. These air pumps are provided with a single air chamber, dual (multiple) air chambers, a single stroke, a dual stroke, etc. These air pumps share one thing in common in that they are all provided with a check valve to ensure the nonreturn of the air being pumped into a bicycle tire from the air pumps. The location and the structure of the check valve are various, depending on the overall design of the air pumps. For example, the U.S. Pat. No. 5,165,876 discloses an air pump comprising a piston rod 39 which is provided at the tail end thereof with a non-return valve 37 and a non-return valve cap 38. The current market situation of the bicycle air pump is chaotic in that the air valve connection heads are often independently designed and manufactured for a specific air pump, and that the air valve connection heads are therefore incompatible with the air pumps other than the specific air pump. Such a chaotic situation as described above is wasteful and uneconomical.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a bicycle air pump with a streamlined air valve connection head which is structurally simplified so as to be compatible with various bicycle air pumps.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by the air valve connection head comprising a housing which is provided at one end with a receiving cell for receiving an air valve of the bicycle tire, and at other end thereof with an engagement hole for connecting the housing with the air pump cylinder. The housing is further provided in other end thereof with an air admission duct in communication with the engagement hole and the receiving cell. The receiving cell is provided with an air injecting mechanism. The housing is provided with a control handle pivoted thereto for controlling the air injecting mechanism to open up the air valve of the bicycle tire to be inflated. The present invention is characterized in that the housing is formed of a first housing member and a second housing member. The first housing member is provided at one end thereof with an insertion hole extending throughout the short axis of the first housing member. The engagement hole is extended from other end of the first housing member to the proximity of the insertion hole. A first air duct is extended from the bottom of the engagement hole to the insertion hole. The second housing member is lodged in the insertion hole. The receiving cell is located in the second housing such that an open end of the receiving cell is corresponding in location to one end of the insertion hole. The control handle is pivotally fastened with the second housing member. The second housing member is provided in the outer periphery thereof with a valve cell corresponding in location to the first air duct. A second air duct is extended from the bottom of the valve cell to the wall of the receiving cell such that the second air duct forms with the first air duct and the valve cell the air admission duct. The valve cell is provided with a check valve allowing air to flow in a one-way manner from the first air duct to the second air duct.


REFERENCES:
patent: 5165876 (1992-11-01), Wang
patent: 5749392 (1998-05-01), Glotin
patent: 5762095 (1998-06-01), Gapinski et al.
patent: 5819781 (1998-10-01), Wu
patent: 5975109 (1999-11-01), Wu
patent: 6105600 (2000-08-01), Wang
patent: 6105601 (2000-08-01), Wang
patent: 6164938 (2000-12-01), Chuang

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