Title: Muffler for intermittent blasts of air from pneumatic tools, valves and the like

Abstract: A muffler for pneumatic tools in which the lubricating oil from mist lubrication and the like is separated from the used air by means of the air first being led through a porous filler and thereafter allowed to pass through a labyrinth path so as to alter the direction of flow and so as to expand. The oil is separated by means of the air striking against guide means, said oil being allowed to trickle down to the bottom of the muffler where it is drained through a tap or faucet. The air is then led through porous filters so as to remove the last traces of oil so as to be able to be discharged freely into the atmosphere.

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Inventors: Wennerstrom, Karl Filip (Stockholm, SW)

Application Number: 639050
Filing Date: 1975-12-09
Publication_date: 1977-07-05
Assignee: Ab Fi-Wes Maskinservice (Stockholm, SW)
Primary Class(es): 181/230 96/385, 181/231
Other Classes:
US Patent Ref:

992344	May, 1911	Donohue	55/276.
2325905	Aug, 1943	Caulfield	55/276.
2419664	Apr, 1947	Tabbert	181/36.
3016108	Jan, 1962	Myddelton	181/36.
3130812	Apr, 1964	Hubrich	55/276.
3687225	Aug, 1972	Nelson	181/36.

Other Refs:
Primary Examiner: Tomsky, Stephen J.
Assistant Examiner:
Attorney: Finnegan, Henderson, Farabow & Garrett