Two stage manual air pump

Pumps – Ambulant – body supported – or with carrying handle

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Details

417238, 417265, F04B 2104, F04B 2502

Patent

active

045084904

ABSTRACT:
A hand pump that is operable selectively as a large volume low pressure air ump or a smaller volume higher pressure pump has a small diameter cylinder reciprocable in a large diameter cylinder and carrying a large diameter plunger and a small diameter plunger reciprocable in the small diameter cylinder. Wire bail type latches are operable to select the mode of pump operation upon reciprocation of the pump handle.

REFERENCES:
patent: 1149324 (1915-08-01), Baldwin
patent: 1424928 (1922-08-01), McClelland
patent: 2175947 (1939-10-01), Teeple
patent: 2185264 (1940-01-01), Mistral

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