# US 10,766,128 B2 · Power tool drive mechanism

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- Number: US 10,766,128 B2
- Document ID: US10766128B2
- Status: Granted
- Kind: B2
- Application number: 16/009,844
- Filed: 2018-06-15
- Published: 2018-10-11
- Granted: 2020-09-08
- Earliest claimed: 2014-07-28
- Assignees: Black & Decker Inc.
- Applicants: Black & Decker Inc.
- Inventors: Paul Gerard Gross; Marco Alessandro Mattucci
- Web page: https://patentgrep.com/patent/US10766128B2

## CPC

- B25C 1/06: operated by electric power
- B25F 5/00: Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25C: HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS (for shoemaking A43D)
- B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)}

## Abstract

A cantilevered flywheel for a motor having an inner rotor. A power tool having an electric motor which drives a cantilevered flywheel. A fastening device having a driver blade and/or driver profile which has a driving action energized by a transfer of energy from contact with a cantilevered flywheel. Methods of using a cantilevered flywheel in power tools and appliances.

## Claims

### Claim 1

A nailer, comprising:
a housing;
a motor disposed in the housing, the motor having a stator and a rotor;
a magazine which holds nails to be driven by the nailer;
a driver configured to drive the nails;
a flywheel which is driven by the motor, the flywheel having a cantilevered portion which radially surrounds at least a portion of the stator;
wherein the flywheel has a flywheel ring with at least one groove;
wherein the at least one groove is on the cantilevered portion; and
wherein the rotor is located radially inwardly compared to the stator.

### Claim 2 (depends on 1)

The nailer of claim 1, wherein the at least one groove radially surrounds at least a portion of the stator.

### Claim 3 (depends on 2)

The nailer of claim 2, wherein the at least one groove radially surrounds at least a portion of the rotor.

### Claim 4 (depends on 2)

The nailer of claim 2, wherein the motor further comprises a motor housing which surrounds the stator and the rotor; and
wherein the at least one groove radially surrounds at least a portion of the motor housing.

### Claim 5 (depends on 1)

The nailer of claim 1, wherein the driver includes a driver profile and a driver blade.

### Claim 6 (depends on 5)

The nailer of claim 5, wherein the driver profile engages the at least one groove so that the driver receives energy from the flywheel.

### Claim 7 (depends on 1)

The nailer of claim 1, wherein the motor further includes a rotor shaft; and
wherein the flywheel is attached to the rotor shaft.

### Claim 8 (depends on 7)

The nailer of claim 7, wherein the rotor shaft is located along a longitudinal axis of the motor.

### Claim 9

A nailer, comprising:
a housing;
a motor disposed in the housing, the motor having a stator and a rotor;
a magazine which holds nails to be driven by the nailer;
a flywheel which is driven by the motor, the flywheel having a flywheel ring;
a driver configured to drive the nails, the driver including a driver profile configured to selectively engage the flywheel ring to receive energy from the flywheel;
wherein the flywheel has a cantilevered portion which radially surrounds at least a portion of the stator;
wherein the flywheel ring is on the cantilevered portion; and
wherein the rotor is located radially inwardly compared to the stator.

### Claim 10 (depends on 9)

The nailer of claim 9, wherein the flywheel ring includes at least one groove.

### Claim 11 (depends on 10)

The nailer of claim 10, wherein the at least one groove radially surrounds at least a portion of the stator.

### Claim 12 (depends on 11)

The nailer of claim 11, wherein the at least one groove radially surrounds at least a portion of the rotor.

### Claim 13 (depends on 9)

The nailer of claim 9, wherein the motor further comprises a motor housing which surrounds the stator and the rotor; and
wherein the at least one groove radially surrounds at least a portion of the motor housing.