Bicycle seat post housed tire pump with two check valves

B - Operations – Transporting – 65 – B

Patent

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Details

280/42, 230/53

B65B 3/04 (2006.01) B62J 11/02 (2006.01) F04B 33/00 (2006.01) F04B 39/00 (2006.01)

Patent

CA 1329577

PUMP ABSTRACT OF THE INVENTION An air pump particularly suitable for use with bicycles includes a first elongated tube forming a pump chamber and housing, a second elongated tube coupled with a piston through a connecting rod to reciprocate the piston within the pump chamber, and a flexible hose pneumatically coupled at one end with an air passage extending through the piston and having at its opposing end an air valve coupling. The first and second elon- gated tubes have outer diameters of a size permitting them to be received in and clamped by a seat tube collar of a bicycle frame and the seat post collar of a seat of the bicycle respectively. The piston includes an annular sliding valve member used with a tapered annular valve seat which permits air compression to pressures of about 200 psi while preventing blowby. A second valve pneumatically coupled with the air passage prevents back flow. The elongated tubes are fixedly secured together in a releasable fashion to prevent relative axial motion or rotation, permitting the use of the pump as a bicycle seat post.

615485

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