US 12,459,092 B2
Pneumatic nail gun
Weiming Yang, Jinhua (CN)
Assigned to ZHEJIANG PRULDE ELECTRIC APPLIANCE CO., LTD., Jinhua (CN)
Filed by ZHEJIANG PRULDE ELECTRIC APPLIANCE CO., LTD., Zhejiang (CN)
Filed on Feb. 5, 2024, as Appl. No. 18/432,537.
Claims priority of application No. 202310110657.2 (CN), filed on Feb. 9, 2023.
Prior Publication US 2024/0269812 A1, Aug. 15, 2024
Int. Cl. B25C 1/04 (2006.01)
CPC B25C 1/047 (2013.01) 14 Claims
OG exemplary drawing
 
1. A pneumatic nail gun, comprising:
a body and a nail feeding device,
the body comprising a cylinder assembly and a drive assembly,
the cylinder assembly comprising a first cylinder, a second cylinder, a striker, and an interlocking structure,
the first cylinder comprising a cylinder housing, a first piston driven by the drive assembly, and a first chamber formed by fitting between the first cylinder and the cylinder housing, the first piston having a front limit position and a rear limit position relative to the cylinder housing,
the second cylinder comprising a barrel, a second piston disposed in the barrel, and a second chamber formed by fitting between the second piston and the barrel, the striker being connected to the second piston, the striker and the second piston each having an initial position and a nail-striking position, the initial position and the nail-striking position of the striker being synchronous to the initial position and the nail-striking position of the second piston,
the inter-locking structure limiting the second piston to the initial position while the first piston is moving from the front limit position towards the rear limit position, wherein:
an intake gap is formed between the cylinder housing and the first piston located at the front limit position, the intake gap allowing for external air to flow into the first chamber of the first cylinder,
the second cylinder is disposed in the first cylinder,
the barrel passes through the first piston,
the interlocking structure is disposed in a rear end of the cylinder housing,
the barrel is provided with a vent hole communicating the first chamber and the second chamber, and
the vent hole is at least partially disposed rear to the second piston at the initial position so that compressed air in the first chamber flows into the second chamber via the vent hole to act on the second piston, driving the second piston to bring the striker to move forward from the initial position to the nail-striking position.