Title: Muffler for portable pneumatic tool

Abstract: The invention relates to a muffler for portable pneumatic tools wherein the exhaust of the pneumatic motor is passed into an expansion chamber having a perforated outlet baffle biased to the direction of the flow in the chamber. The flow from the expansion chamber enters a muffler chamber having an outlet baffle also biased to the direction of fluid flow. Both the first and second baffle are formed in an end cap for the handle of the pneumatic tool and form a removable extension thereof.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Auerbach, Edward I. (Belle Mead, NJ, US)
Pritchard, Lewis C. (San Jose, CA, US)
Clapp, John M. (Sayre, PA, US)

Application Number: 018143
Filing Date: 1979-03-07
Publication_date: 1980-06-03
Assignee: Ingersoll-Rand Company (Woodcliffe Lake, NJ)
Primary Class(es): 181/230 181/258, 181/275
Other Classes:
US Patent Ref:

1575657	Mar, 1926	Straussler	181/258.
1666257	Apr, 1928	Furnivall et al.	181/258.
2950775	Aug, 1960	Zwayer	181/230.
3384200	May, 1968	Baker et al.	181/230.
3880245	Apr, 1975	Anderso, Jr.	181/230.
3993159	Nov, 1976	Amador	181/230.

Other Refs: 2355203291875

Jan, 1975	DE
Jun, 1928	GB

Primary Examiner: Hix, L. T.
Assistant Examiner: Fuller, Benjamin R.
Attorney: Vliet; Walter C.