Structure for connecting a head to a non-circular cylinder of a

Details Structure for connecting a head to a non-circular cylinder of a Structure for connecting a head to a non-circular cylinder of a

1998-07-30

2000-04-18

Freay, Charles G.

Pumps

Expansible chamber type

Plural pumping chambers

417531, 417440, F04B 2300, F04B 3910

Patent

active

060507918

ABSTRACT:
A bicycle tire pump includes a cylinder having two passages defined therethrough which are separated by a board, two openings respectively defined in a top of the cylinder and communicating with the two passages into which two pistons are respectively and movably received. A head is mounted to the top of the cylinder and has two ways defined therein which respectively communicate with the two passages in the cylinder and an outlet of the head. A bolt extends through one of the two passages and is threadedly connected to the head. The bolt has a longitudinal passage defined therethrough which communicates with one of the two ways.

REFERENCES:
patent: 872043 (1907-11-01), Beck et al.
patent: 1390559 (1921-09-01), Huntley
patent: 2383181 (1945-08-01), Enslin et al.
patent: 3907461 (1975-09-01), Bouder
patent: 5683234 (1997-11-01), Chuang et al.
patent: 5715554 (1998-02-01), Downs et al.
patent: 5779457 (1998-07-01), Chuang et al.
patent: 5902097 (1999-05-01), Wu

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