US 12,350,798 B2
Nailers with jamming-alleviating mechanisms
Ying Xiang Tan, Dongguan (CN); Hai Ling Lin, Dongguan (CN); Xi He, Dongguan (CN); and Jin Lin Zhou, Dongguan (CN)
Assigned to Techtronic Power Tools Technology Limited, Tortola (VG)
Filed by TECHTRONIC CORDLESS GP, Anderson, SC (US)
Filed on Jun. 2, 2023, as Appl. No. 18/328,426.
Application 18/328,426 is a continuation of application No. 16/981,496, granted, now 11,667,018, previously published as PCT/CN2018/097715, filed on Jul. 30, 2018.
Claims priority of application No. 201810431869.X (CN), filed on May 8, 2018.
Prior Publication US 2023/0302617 A1, Sep. 28, 2023
Int. Cl. B25C 1/04 (2006.01); B25C 1/00 (2006.01); B25C 1/06 (2006.01)
CPC B25C 1/047 (2013.01) [B25C 1/008 (2013.01); B25C 1/041 (2013.01); B25C 1/06 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A fastener tool comprising:
a motor;
a drive mechanism connected to the motor and adapted to drive a piston; and
a cylinder filled with compressed gas,
wherein the piston is accommodated in the cylinder and suitable for a reciprocating motion within the cylinder,
wherein the drive mechanism includes a blade fixed to the piston and a gear coupled to the motor, wherein the gear includes a gear body and a plurality of teeth spaced apart on the gear body adapted to engage with a plurality of lugs on the blade such that a rotation of the gear is transformed to a linear movement of the blade,
wherein the drive mechanism further includes a disengagement module which, within a period of a rotation cycle of the gear, is configured to prevent interference between a first tooth of the plurality of teeth and a misaligned one of the lugs of the blade during the rotation cycle,
wherein the gear body includes a groove defining a path in which at least part of the first tooth is movable between an extended position and a shrunken position, and
wherein the disengagement module includes a stopper element mounted on and rotatable with the gear body, into which at least part of the stopper element inhabits part of the groove and blocks the path of the first tooth to its shrunken position within the period, and is configured to engage an actuator adapted to urge the stopper element out of the groove enabling the first tooth to move into the shrunken position outside the period.