Pumps – Expansible chamber type – Valved piston
Reexamination Certificate
2002-07-08
2004-05-18
Yu, Justine R. (Department: 3746)
Pumps
Expansible chamber type
Valved piston
C092S058100
Reexamination Certificate
active
06736618
ABSTRACT:
BACKGROUND OF INVENTION
1. Field of Invention
The present invention is related to a pump for easy attachment to a bicycle.
2. Related Prior Art
Cycling is a very popular activity for traveling and/or exercising. A lot of riders like to carry pumps with them for use in case of emergency. Pumps are classified into large, medium and small sizes. Pumps of the large size are capable of pumping in a time-economic manner; however, they are often too bulky and heavy for bicycle riders to carry. Pumps of the small size can be easily carried by bicycle riders; however, can are not capable of pumping in a time-economic manner. It has been found that pumps of the medium size provide a balance between time economics and easiness of carrying for bicycle riders.
SUMMARY OF INVENTION
It is the primary objective of the present invention to provide a pump for easy attachment to a bicycle.
According to the present invention, a pump includes a cylinder, a tube, a hollow piston, a nozzle, a hollow handle and an elastic element. The tube is partially and movably inserted in the cylinder. The hollow piston is in fluid communication with the tube and movably received in the cylinder for pumping. The nozzle is in fluid communication with the tube, and includes an end face in compliance with a first external structure. The hollow handle is mounted on the cylinder between a first mode preventing their relative movement and a second mode allowing their relative movement. The hollow handle includes an open end through which the tube is inserted and a closed end with an internal face and an external face in compliance with a second external structure. The elastic element is compressed between an end of the cylinder and the closed end of the hollow handle.
At least one block is formed on an external face of the cylinder or an internal face of the hollow handle. At least one L-shaped groove is defined in the internal face of the hollow handle or the external face of the cylinder. The at least one L-shaped groove includes a transverse section and a longitudinal section. In the first mode, the at least one block is received in the transverse section of the at least one L-shaped groove. In the second mode, the at least one block is received in the longitudinal section of the at least one L-shaped groove
The pump includes a collar mounted on the cylinder and connected with the hollow handle for abutment against the at least one block, thus retaining the hollow handle on the cylinder.
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the attached drawings.
REFERENCES:
patent: 4120614 (1978-10-01), Bouder
patent: 4569275 (1986-02-01), Brunet
patent: 5782621 (1998-07-01), Harris
patent: 6506026 (2003-01-01), Wu
patent: 6615704 (2003-09-01), Chuang
Baxley Charles E.
Rodriguez William H.
Yu Justine R.
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