Air pump for bicycle

Details Air pump for bicycle Air pump for bicycle

1991-04-04

1992-08-11

Bertsch, Richard A.

Pumps

Operated by art device

Vehicle mounted or attached

417236, 4175551, 280201, F04B 1706, F04B 4100, F04B 2102, C10G 1906

Patent

active

051374307

ABSTRACT:
An air pump which can be stored in the frame of the bicycle and can also serve as the seat post of the bicycle. The air pump has an outer, tubular post having an upper end to which a bicycle seat can be secured. A rigid tube extends partially into the post and carries a diaphragm on its inner end. The diaphragm is engageable with the inner surface of the post and compresses air in an air chamber in advance of the diaphragm when the diaphragm moves toward a closed end of the post. A flexible tube of relatively small diameter extends through a part of the rigid tube. The flexible tube has one end communicating with the air chamber and the other end is outside the rigid tube and is adapted to be coupled to a tire valve for inflating the tire. The flexible tube is of such small diameter and flexibility that no check valve is needed.

REFERENCES:
patent: 526175 (1894-09-01), Barbour
patent: 674829 (1901-05-01), Furbow
patent: 702976 (1902-06-01), Lymburner
patent: 730074 (1903-06-01), Allen
patent: 4712592 (1987-12-01), Brown

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