Pusher mechanism for powered fastener driver

Patent metadata

Field	Value
Publication number	US-11865683-B2
Application number	US-202117313096-A
Country	US
Kind code	B2
Filing date	May 6, 2021
Priority date	May 6, 2020
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

A powered fastener driver comprising a housing, a nosepiece coupled to the housing and extending therefrom, a driver blade movable within the nosepiece between a ready position and a driven position, and a pusher mechanism coupled to the nosepiece for individually transferring collated fasteners in a canister magazine to a driver channel in the nosepiece in which the driver blade is movable. The pusher mechanism includes a feeder arm and a linkage positioned between the feeder arm and the driver blade. The feeder arm is engageable with individual fasteners in the nosepiece for sequentially pushing each of the fasteners into the driver channel in response to movement of the feeder arm toward the driver channel. The linkage is movable to advance the feeder arm toward the driver channel in response to contact with the driver blade as the driver blade moves from the driven position toward the ready position.

First claim

What is claimed is:

1. A powered fastener driver comprising:
a housing;
a nosepiece coupled to the housing and extending therefrom;
a driver blade movable within the nosepiece between a ready position and a driven position;
a canister magazine coupled to the nosepiece in which collated fasteners are receivable; and
a pusher mechanism coupled to the nosepiece for individually transferring collated fasteners in the canister magazine to a driver channel in the nosepiece in which the driver blade is movable, wherein the pusher mechanism includes:
a feeder arm that is engageable with individual fasteners in the nosepiece for sequentially pushing each of the fasteners into the driver channel in response to movement of the feeder arm toward the driver channel, and
a linkage assembly positioned between the feeder arm and the driver blade, the linkage assembly including:
a pivot arm operatively coupled to the feeder arm, and a lever pivotably coupled to the pivot arm by a first pivot point, and wherein movement of the driver blade from the driven position toward the ready position causes each of the pivot arm and the lever to pivot about the first pivot point in a first rotational direction;
a first spring disposed between the pivot arm and the lever, wherein the first spring is configured to bias the lever into alignment with the pivot arm, and wherein the lever is configured to selectively move relative to the pivot arm about the first pivot point against the bias of the first spring in the first rotational direction as the driver blade moves from the driven position toward the ready position;
a support arm pivotably coupled to the housing by a second pivot point, wherein the lever is positioned between the pivot arm and the support arm, wherein each of the first pivot point and the second pivot point are fixed relative to the housing, wherein the support arm is pivotably coupled to the lever by a floating pivot point, and wherein the movement of the driver blade from the driven position toward the ready position causes the floating pivot point to move relative to the housing; and
a finger pivotably coupled to the support arm by a third pivot point, and wherein the finger is selectively engageable with the driver blade;
wherein the linkage assembly is movable to advance the feeder arm toward the driver channel in response to contact with the driver blade as the driver blade moves from the driven position toward the ready position.

2. The powered fastener driver of claim 1 , wherein the driver blade includes a rear surface and a fin extending therefrom, and wherein the finger is selectively engageable with the fin of the driver blade to move the linkage assembly.

3. The powered fastener driver of claim 2 , wherein the linkage assembly further includes a second spring configured to bias the finger toward a first position, and wherein the engagement between the finger and the fin during movement of the driver blade from the ready position toward the driven position causes the finger to move toward a second position against the bias of the second spring.

4. The powered fastener driver of claim 2 , wherein the fin includes a first surface inclined at an oblique angle relative to the rear surface of the driver blade and a second surface extending perpendicular from the rear surface of the driver blade, and wherein the finger is selectively engageable with each of the first surface and the second surface during movement of the driver blade between the driven position and the ready position.

5. The powered fastener driver of claim 1 , wherein the linkage assembly further includes a third spring exerting a biasing force on the lever in a second rotational direction opposite the first rotational direction.

6. The powered fastener driver of claim 1 , wherein the pivot arm is selectively movable in the first rotational direction about the first pivot point to move the feeder arm away from the driver channel.

7. The powered fastener driver of claim 6 , wherein the pusher mechanism further includes a fourth spring exerting a biasing force on the pivot arm in a second rotational direction opposite the first rotational direction to move the feeder arm toward the driver channel.

8. The powered fastener driver of claim 6 , wherein the pusher mechanism includes a body, wherein the feeder arm is coupled for movement with the body, and wherein the pivot arm is a fork configured to receive a protruding pin of the body for converting pivoting movement of the pivot arm into linear motion of the body and the feeder arm.

9. A powered fastener driver comprising:
a housing;
a nosepiece coupled to the housing and extending therefrom;
a driver blade movable within the nosepiece between a ready position and a driven position, the driver blade including a rear surface and a fin extending from the rear surface;
a canister magazine coupled to the nosepiece in which collated fasteners are receivable; and
a pusher mechanism coupled to the nosepiece for individually transferring collated fasteners in the canister magazine to a driver channel in the nosepiece in which the driver blade is movable, wherein the pusher mechanism includes:
a feeder arm that is engageable with individual fasteners in the nosepiece for sequentially pushing each of the fasteners into the driver channel in response to movement of the feeder arm toward the driver channel, and
a linkage assembly positioned between the feeder arm and the driver blade, the linkage assembly including;
a first member;
a second member pivotably coupled to the first member by a floating pivot point;
a third member operatively coupled between the first member and the feeder arm, wherein the third member is pivotably coupled to the first member by a first pivot point, and wherein movement of the driver blade from the driven position toward the ready position causes each of the first member and the third member to pivot about the first pivot point in a first rotational direction;
a first spring disposed between the first member and the third member, wherein the first spring is configured to bias the first member into alignment with the third member, and wherein the first member is configured to selectively move relative to the third member about the first pivot point against the bias of the first spring in the first rotational direction as the driver blade moves from the driven position toward the ready position; and
a second spring exerting a biasing force on the first member in a second rotational direction opposite the first rotational direction;

wherein the second member is pivotably coupled to the housing by a second pivot point, wherein each of the first pivot point and the second pivot point are fixed relative to the housing, and wherein the floating pivot point is positioned between the first pivot point and the second pivot point,
wherein the linkage assembly is movable to advance the feeder arm toward the driver channel in response to contact with the driver blade as the driver blade moves from the driven position toward the ready position, and
wherein the floating pivot point is selectively movable relative to the housing by engagement between the fin and the linkage assembly as the driver blade moves from the driven position toward the ready portion thereby causing movement of the linkage assembly.

10. The powered fastener driver of claim 9 , wherein the linkage assembly includes a finger operatively coupled to second member, and wherein the finger is selectively engageable with the fin of the driver blade.

11. The powered fastener driver of claim 10 , wherein the linkage assembly further includes a third spring configured to bias the finger toward a first

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Leathrum Travis W
• Thorson Troy C

Classifications

• B25C5/0228

  power-operated · CPC title

• B25C5/1617

  employing a spring-loaded pusher · CPC title

• B25C5/06

  without provision for bending the ends of the staples on to the work · CPC title

• B25C5/1675

  unjamming by movement of the feeding device · CPC title

• B25C5/1627

  of incremental type · CPC title