초록 ▼

A compressed air exhaust arrangement in a pneumatic fastener driving tool. An exhaust port is formed in an upper portion of a main body, and a cover member is fixed onto the upper portion. An annular muffler member is disposed between the cover member and an upper surface of the main body to surroun

A compressed air exhaust arrangement in a pneumatic fastener driving tool. An exhaust port is formed in an upper portion of a main body, and a cover member is fixed onto the upper portion. An annular muffler member is disposed between the cover member and an upper surface of the main body to surround the exhaust port. The cover member has a lower surface formed with a plurality of cranked grooves for providing a plurality of air vent passages relative to an upper surface of the muffler member. The air vent passage allows the compressed air from the exhaust port to pass therethrough toward an atmosphere. Before freeze of the muffler member, most of the compressed air discharged through the exhaust port directly passes through the muffler member. After freeze of the muffler member, the compressed air passes through the air vent passage.

대표청구항 ▼

[ What is claimed is:] [1.] A pneumatic fastener driving tool comprising:a main body formed with an exhaust port;a cylinder disposed in the main body;a drive piston reciprocally movably disposed in the cylinder;a drive bit connected to the drive piston for driving a fastener in one direction, a comp

[ What is claimed is:] [1.] A pneumatic fastener driving tool comprising:a main body formed with an exhaust port;a cylinder disposed in the main body;a drive piston reciprocally movably disposed in the cylinder;a drive bit connected to the drive piston for driving a fastener in one direction, a compressed air being applied to the drive piston for its movement in the one direction;a cover member attached to the main body portion; anda muffler member fixed at a position by the cover member and at a position outwardly of the exhaust port for allowing the compressed air which has been passing through the exhaust port to pass through the muffler member toward an atmosphere, at least one air vent passage being formed between a peripheral surface of the muffler member and one of the cover member and the main body for permitting the compressed air which has been passing through the exhaust port to be discharged toward the atmosphere through the at least one air vent passage.