Fluent material handling – with receiver or receiver coacting mea – Filling means with receiver or receiver coacting means – With puncturing connecting means
Reexamination Certificate
2000-02-09
2001-03-20
Douglas, Steven O. (Department: 3751)
Fluent material handling, with receiver or receiver coacting mea
Filling means with receiver or receiver coacting means
With puncturing connecting means
C141S038000, C141S067000, C141S301000, C222S386000
Reexamination Certificate
active
06202714
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to an air pump, and more particularly to an air pump provided with a space for containing an air bottle.
BACKGROUND OF THE INVENTION
The conventional air pump is generally defective in design in that the air in the high pressure air bottle is not effectively pumped into the object being inflated. In addition, when the air bottle is exhausted of the high pressure air, no additional air bottle is immediately available.
SUMMARY OF THE INVENTION
The present invention is intended to overcome the shortcomings of the conventional air pump described above.
The air pump of the present invention comprises a head member, an inner tube, a check valve, and a one-way air valve. The head member is provided therein with a control valve which is provided at one end thereof with an air nozzle and at other end thereof with a press rod for controlling the control valve. The head member is provided in one side thereof with a connection portion which is in turn provided with a channel and a guide cell. The inner tube is connected with the connection portion and is provided therein with a receiving space in communication with the channel and the guide cell. The receiving space is also in communication with the atmospheric air via a duct in which the check valve is disposed. The inner tube is fitted into an outer tube such that a compressible space is formed between the inner tube and the outer tube, and that the outer tube is movable in relation to the inner tube. The one-way air valve is disposed between the inner tube and the outer tube to enable air to enter the compressible space, thereby enabling the outer tube to compress the air contained in the compressible space. The compressed air is let out to inflate an object via the check valve, the control valve, and the air nozzle.
REFERENCES:
patent: 4969493 (1990-11-01), Lee
patent: 5967204 (1999-10-01), Ferris et al.
Browdy and Neimark
Douglas Steven O.
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