Patent ID: 11865683
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
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.