Air pump having minimum number of parts

Details Air pump having minimum number of parts Air pump having minimum number of parts

2000-01-27

2004-04-20

Basinger, Sherman (Department: 3617)

Ships

Boats, boat component, or attachment

Inflatable

C005S708000, C441S040000

Reexamination Certificate

active

06722306

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates in general to an air pump having a minimum number of parts.
2. Description of the Related Art
Referring to
FIG. 1
, an air mattress
12
has an inflation valve
16
. The user uses an electric dryer
14
to inflate the air mattress
12
through the inflation valve
16
. However, the user cannot fill up the air mattress very completely by using the electric dryer, because electric dryers available in the market for inflating an inflatable toy generally are cheap and the air pressure generated by the electric dryer is not high. Using the electric dryer to inflate the air mattress is acceptable. However, using the electric dryer to inflate an inflatable boat is not.
The user uses an air pump instead of an electric dryer to inflate an inflatable boat. Referring to
FIGS. 2A and 2B
, an inflatable boat
20
has a built-in air pump
25
. The air pump
25
has a pump body
250
, a band
251
and a heavy weight
256
, wherein the heavy weight
256
is firmly attached to the bottom of the pump body
250
. When the user pulls up the band
251
, the heavy weight
256
resists the pull so that the pump body
250
is extended and outside air
200
is sucked into the pump body
250
through a check valve
253
. Then, the user depresses the air pump, forcing the air
100
from the pump body
250
into the inflatable boat
20
through another check valve
254
. The inflatable boat
20
can be filled with air by repeating such operations.
The present invention provides a modified air pump for filling up an inflatable product like an inflatable boat. The air pump has a minimum number of parts to reduce the material and production cost thereof.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a simplified, low-cost air pump. The air pump of the present invention is built in the inflatable body of an inflatable product. The air pump consists essentially of a pump body, an air inlet provided on the pump body for introducing air outside the inflatable body into the pump body, and an air outlet also provided on the pump body for introducing the air from the pump body into the inflatable body.
It is noted that the pulling band of the prior art for the user to restore the air pump shape is not used in the present invention. The air pump of the present invention only has three parts—the pump body, the air inlet and the air outlet.


REFERENCES:
patent: 388037 (1888-08-01), Hargin
patent: 2866834 (1958-12-01), Gilbertson
patent: 3068494 (1962-12-01), Pinkwater
patent: 3133696 (1964-05-01), Mirando
patent: 3155991 (1964-11-01), Dunham
patent: 3179963 (1965-04-01), Peterson
patent: 6004116 (1999-12-01), Wang
patent: 6287095 (2001-09-01), Saputo et al.
patent: 807010 (1951-06-01), None
patent: 708759 (1954-05-01), None
patent: WO 96/02168 (1996-02-01), None

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