Hand air pumps

Details Hand air pumps Hand air pumps

1996-05-24

1998-09-15

Izaguirre, Ismael

Pumps

Successive stages

Reciprocating rigid stages

F04B 300

Patent

active

058070788

ABSTRACT:
A hand air pump includes a cylinder having a relatively small chamber and a relatively large chamber defined therein. A relatively small piston is slidably received in the relatively small chamber, and a relatively large piston is slidably received in the relatively large chamber. The two pistons are connected to an operative handle outside the cylinder. Air inside the relatively large chamber is accumulated in the relatively small chamber and is then outputted by the relatively small piston.

REFERENCES:
patent: 816520 (1906-03-01), Wray
patent: 848629 (1907-04-01), Burkholder
patent: 855026 (1907-05-01), Stapley
patent: 1306382 (1919-06-01), Koltz

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