US 11,890,734 B2 · Lift mechanism for framing nailer

Abstract

A fastener driving tool that includes a lift mechanism for moving the driver from a driven position to a ready position. In one embodiment, the lift mechanism is mounted to a movable pivot arm, and the pivot arm is slightly rotated to allow the driver to drive a fastener; when the driver is to be lifted in a return stroke, the lifter subassembly is moved back into engagement with the driver, and multiple lifter pins contact protrusions in the driver to lift the driver from the driven position to the ready position. In another embodiment, the pivotable lifter floats along the driver, and “releases” from contact only to prevent a jam or otherwise undesirable operating condition involving the driver; otherwise, the lifter remains nested in the tool's guide body during all operating states. A solenoid-operated latch also is provided to prevent the driver from moving downward (for driving a fastener).

A lifting machine for use in a fastener driving tool, said lifting machine comprising:

(a) a movable piston;
(b) a guide body that includes a driver track;
(c) an elongated driver that is in mechanical communication with said movable piston at a first end of said driver, said driver having a second, opposite end that is sized and shaped to push a fastener, said driver having a direction of movement along the driver track that is substantially along a longitudinal axis that extends at least between the first end and the second end, said driver including a first face that extends along a length direction parallel to the longitudinal axis at least partially between the first end and the second end, a second face that extends along a length direction parallel to the longitudinal axis at least partially between the first end and the second end, a third face that extends along a length direction parallel to the longitudinal axis at least partially between the first end and the second end, and a fourth face that extends along a length direction parallel to the longitudinal axis at least partially between the first end and the second end, said first face having a first common edge with said second face, said second face having a second common edge with said third face, said third face having a third common edge with said fourth face, and said fourth face having a fourth common edge with said first face, said first face being substantially wider than said second face, said first face being substantially wider than said fourth face, and said first face being about the same width as said third face, in which the outer surfaces of said first, second, third, and fourth faces substantially create an overall rectangular shape in cross-section, with said first and third faces being on opposite sides of the driver from one another, and with the second and fourth faces being on opposite sides of the driver from one another;
(i) a first plurality of spaced-apart protrusions that extend from said second face in a direction that is substantially parallel to the first face;
and
(ii) a second plurality of spaced-apart protrusions that extend from said fourth face in a direction that is substantially parallel to the first face;
(d) a rotatable lifter subassembly comprising a first rotatable disk and a second rotatable disk, said first and second rotatable disks rotate together, said first rotatable disk having a first plurality of spaced-apart lifter pins extending from a surface of the first rotatable disk, and said second rotatable disk having a second plurality of spaced-apart lifter pins extending from a surface of the second rotatable disk;
(e) wherein, during a lifting stroke that lifts said driver toward the movable piston:
(i) said first and second rotatable disks both rotate in a first direction;
and
(ii) a rotational movement of both said first plurality of lifter pins and said second plurality of lifter pins engage, respectively, with said first plurality of spaced-apart protrusions of the driver and with said second plurality of spaced-apart protrusions of the driver.

8 more elements

Facts

Application

17/957,467Filed 30 Sep 2022 · continuation

Priority

30 Mar 2015

Published

US 2023/0024447 A126 Jan 2023

Granted

6 Feb 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

B25C 1/047
Operated by fluid pressure , e.g. by air pressure: mechanical details
B25C 1/06
Hand-held nailing tools ; Nail feeding devices: operated by electric power
B25C
Hand-held nailing or stapling tools

Family

Application62/140,177Us provisional application · filed 30 Mar 2015

Application15/082,584Parent of this continuation · filed 28 Mar 2016

Application16/726,488Parent of this continuation · filed 24 Dec 2019

US 10,549,412 B2Parent of this continuation · filed 4 Feb 2020

US 11,491,624 B2Parent of this continuation · filed 8 Nov 2022

US 2023/0024447 A1Pre-grant publication · published 26 Jan 2023

US 2016/0288305 A1Published application

US 2020/0156228 A1Published application

US 11,890,734 B2This patent

From the US filing history. Foreign family members aren’t listed.

Lift mechanism for framing nailer

Life of this patent

Lift mechanism for framing nailer

Life of this patent

Abstract

Claims14