US 11,679,478 B2
Cylinder assembly for gas spring fastener driver
Edward Pomeroy, Piedmont, SC (US); Zachary Scott, Easley, SC (US); John Schnell, Anderson, SC (US); and Essam Namouz, Greenville, SC (US)
Assigned to TECHTRONIC POWER TOOLS TECHNOLOGY LIMITED, Tortola (VG)
Filed by TECHTRONIC CORDLESS GP, Anderson, SC (US)
Filed on Mar. 19, 2020, as Appl. No. 16/824,131.
Application 16/824,131 is a continuation of application No. 15/807,727, filed on Nov. 9, 2017, granted, now 10,632,600.
Claims priority of provisional application 62/419,801, filed on Nov. 9, 2016.
Prior Publication US 2020/0215672 A1, Jul. 9, 2020
Int. Cl. B25C 1/04 (2006.01); B25C 1/00 (2006.01); B25C 1/06 (2006.01)
CPC B25C 1/008 (2013.01) [B25C 1/04 (2013.01); B25C 1/047 (2013.01); B25C 1/06 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A fastener driver comprising:
a housing; and
a cylinder assembly including
an inner cylinder containing a compressed gas,
a moveable piston positioned within the inner cylinder,
a driver blade attached to the piston and moveable therewith from a retracted position to a driven position to drive a fastener into a workpiece,
a bumper positioned within the inner cylinder to retain the moveable piston within the inner cylinder,
a mounting plate affixed to the housing,
a first bore in the mounting plate and a second bore in the inner cylinder aligned with the first bore, and
a fastener received within the first and second bores to secure the inner cylinder to the mounting plate, wherein the second bore in the inner cylinder is in fluid communication with a gas storage chamber, and wherein the fastener, when threaded to the second bore in the inner cylinder, seals the second bore in the inner cylinder;
wherein the cylinder assembly is removably coupled to the housing.