Powered fastener driver

Patent metadata

Field	Value
Publication number	US-2026001205-A1
Application number	US-202519241156-A
Country	US
Kind code	A1
Filing date	Jun 17, 2025
Priority date	Jun 27, 2024
Publication date	Jan 1, 2026
Grant date	—

Abstract

A powered fastener driver includes a drive blade movable from a top-dead-center (TDC) position to a driven or bottom-dead-center (BDC) position for driving a fastener into a workpiece, a piston coupled to the drive blade, a drive unit for providing torque to move the drive blade, a rotary lifter configured to receive torque from the drive unit in a first rotational direction for returning the drive blade from the BDC position toward the TDC position, and a gas spring assembly having a master supply cylinder in which gas is compressed by the piston in response to being moved from the BDC position toward the TDC position, a drive cylinder having a flange against which an end of the master supply cylinder is abutted, and an end cap secured to the master supply cylinder to apply a clamping force to the flange against the end of the master supply cylinder.

First claim

1 . A powered fastener driver comprising:
a drive blade movable from a top-dead-center (TDC) position to a driven or bottom-dead-center (BDC) position for driving a fastener into a workpiece; a piston coupled to the drive blade for movement therewith between the TDC position and the BDC position; a drive unit for providing torque to move the drive blade from the BDC position toward the TDC position; a rotary lifter engageable with the drive blade, the rotary lifter configured to receive torque from the drive unit in a first rotational direction for returning the drive blade from the BDC position toward the TDC position; and a gas spring assembly including
a master supply cylinder in which gas is stored and compressed by the piston in response to the piston being moved from the BDC position toward the TDC position,
a drive cylinder at least partially positioned within the master supply cylinder and having a flange against which an end of the master supply cylinder is abutted, and
an end cap secured to the master supply cylinder to apply a clamping force to the flange against the end of the master supply cylinder, thereby axially affixing the drive cylinder to the master supply cylinder.

2 . The powered fastener driver of claim 1 , further comprising a fill valve coupled to the master supply cylinder.

3 . The powered fastener driver of claim 1 , wherein the flange extends from a first end of the drive cylinder.

4 . The powered fastener driver of claim 3 , wherein the drive cylinder includes an outer surface from which the flange extends, the outer surface having a circumferential groove in which a seal is disposed, the seal engaging the master supply cylinder.

5 . The powered fastener driver of claim 3 , wherein the end cap is threadedly coupled to the master supply cylinder and the flange is positioned between the master supply cylinder and a flange of the end cap, and wherein the clamping force is applied to the flange of the drive cylinder by the flange of the end cap in response to the end cap being threaded to the master supply cylinder.

6 . The powered fastener driver of claim 3 , wherein the master supply cylinder includes external threads to which the end cap is threaded.

7 . The powered fastener driver of claim 1 , further comprising a lifter housing rotatably supporting the rotary lifter, and wherein the drive cylinder is coupled to the lifter housing.

8 . The powered fastener driver of claim 7 , wherein the drive cylinder includes a flare portion having internal threads, and wherein the lifter housing has external threads to which the internal threads on the flare portion are engaged.

9 . A powered fastener driver comprising:
a drive blade movable from a top-dead-center (TDC) position to a driven or bottom-dead-center (BDC) position for driving a fastener into a workpiece; a piston coupled to the drive blade for movement therewith between the TDC position and the BDC position; a drive unit for providing torque to move the drive blade from the BDC position toward the TDC position; a rotary lifter engageable with the drive blade, the rotary lifter configured to receive torque from the drive unit in a first rotational direction for returning the drive blade from the BDC position toward the TDC position; and a gas spring assembly including
a master supply cylinder in which gas is stored and compressed by the piston in response to the piston being moved from the BDC position toward the TDC position,
a drive cylinder at least partially positioned within the master supply cylinder and having a flange against which an inner shoulder of the master supply cylinder is abutted, and
an end cap secured to an end of the master supply cylinder opposite the inner shoulder to apply a clamping force to the flange against the inner shoulder, thereby axially affixing the drive cylinder to the master supply cylinder.

10 . The powered fastener driver of claim 9 further comprising a seal disposed between the drive cylinder and the master supply cylinder.

11 . The powered fastener driver of claim 9 , wherein the master supply cylinder includes a bore at least partially defined by an inner shoulder at a first end, and the end cap is coupled to a second end of the master supply cylinder opposite the inner shoulder.

12 . The powered fastener driver of claim 9 , further comprising a first support ring and a second support ring disposed between the end cap and a second end of the drive cylinder, the first support ring engaging the end cap and the second support ring engaging the first support ring and the drive cylinder.

13 . The powered fastener driver of claim 12 , wherein the clamping force is transmitted through the first support ring and the second support ring.

14 . The powered fastener driver of claim 12 , wherein the first support ring includes a plurality of ridges that abut the end cap and passageways between the ridges.

15 . The powered fastener driver of claim 12 , wherein the second support ring extends at least partially along the drive cylinder.

16 . The powered fastener driver of claim 9 , further comprising a lifter housing rotatably supporting the rotary lifter, wherein the lifter housing includes a plurality of holes, wherein the master supply cylinder includes a plurality of bosses having internal threads and extending from the first end, wherein the bosses are received in the corresponding holes of the lifter housing, and wherein the master supply cylinder is secured to the lifter housing by fasteners.

17 . The powered fastener driver of claim 16 , wherein the master supply cylinder includes four bosses.

18 . The powered fastener driver of claim 9 further comprising a seal disposed between the end cap and the master supply cylinder.

19 . The powered fastener driver of claim 9 further comprising a fill valve coupled to the end cap.

20 . A powered fastener driver comprising:
a drive blade movable from a top-dead-center (TDC) position to a driven or bottom-dead-center (BDC) position for driving a fastener into a workpiece; a piston coupled to the drive blade for movement therewith between the TDC position and the BDC position; a drive unit for providing torque to move the drive blade from the BDC position toward the TDC position; a rotary lifter supported in a lifter housing, the rotary lifter engageable with the drive blade and configured to receive torque from the drive unit in a first rotational direction for returning the drive blade from the BDC position toward the TDC position; and a gas spring assembly including
a master supply cylinder in which gas is stored and compressed by the piston in response to the piston being moved from the BDC position toward the TDC position, the master supply cylinder having an inner shoulder and bosses that are fastened to the lifter housing,
a drive cylinder having an outer surface and a flange extending from the outer surface proximate a first end of the drive cylinder, the drive cylinder at least partially positioned within the master supply cylinder with the flange abutted against the inner shoulder of the master supply cylinder, and
an end cap threaded to an end of the master supply cylinder opposite the inner shoulder to apply a clamping force to an opposite, second end of the drive cylinder to abut the flange against the inner shoulder, thereby axially affixing the drive cylinder to the master supply cylinder.

21 .- 25 . (canceled)

Assignees

• Techtronic Cordless Gp

Inventors

• Sutherland Scott A
• Laugh Curt A

Classifications

• B25C1/042

  Main valve and main cylinder · CPC title

• B25C1/047 Primary

  Mechanical details · CPC title

• B25C1/06

  operated by electric power · CPC title