An adjustable exhaust assembly for a pneumatic fastening tool having body and a handle extending from the body, the handle defining an inlet channel for receiving input of pressurized gas and an outlet channel for outputting exhaust. The adjustable exhaust assembly includes a base non-rotatably attachable to an end of the handle opposite the body. The base has a plate and a boss extending from the plate. The boss is configured to receive an air hose and defining an inlet opening configured to direct compressed air to the inlet channel. The plate has an outlet opening in communication with the outlet channel. A substantially annular and cap is rotatably received about the boss. The cap defines a substantially annular channel in communication with the outlet opening of the base and an outlet port defined in a portion of a circumferential wall of the annular cap and in communication with the annular channel. Rotation of the cap about the boss moves the outlet opening among a plurality of radial positions relative to the boss.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation of U.S. patent application Ser. No. 11/064,423, filed Feb. 22, 2005, titled "Adjustable Exhaust Assembly for Pneumatic Fasteners." now pending, which claims priority, under 35 U.S.C. .sctn. 119(e), to U.S. Provisional Application No. 60/546,685, entitled "Oil Free Head Valve for Pneumatic Nailers and Staplers," filed Feb. 20, 2004, each of which is herein incorporated by reference in its entirety.