Dosing lever for fastener driving tool

Patent metadata

Field	Value
Publication number	US-12251809-B2
Application number	US-202218056119-A
Country	US
Kind code	B2
Filing date	Nov 16, 2022
Priority date	Nov 23, 2021
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

A combustion powered fastener driving tool including a dosing lever that reduces the likelihood of causing inconsistent amounts of fuel to be dispensed by the fuel supply assembly of the tool.

First claim

The invention claimed is:

1. A fastener driving tool comprising:
a housing;
a fastener driving assembly at least partially positioned in the housing, the fastener driving assembly including:
a cylinder head connected to the housing,
a combustion chamber connected to the cylinder head,
a cylinder connected to the combustion chamber, and
a combustion chamber ring between the combustion chamber and the cylinder head, the combustion chamber ring movable from an actuated position to a non-actuated position;

a workpiece contact assembly connected to the housing; and
a fuel supply assembly at least partially in the housing, the fuel supply assembly including:
a fuel cell receiving assembly in the housing, the fuel cell receiving assembly configured to receive a fuel cell and a fuel cell adapter connectible to the fuel cell;
a fuel cell receiving block shaped and sized to receive the fuel cell adapter, and
a dosing lever pivotally supported by the housing and pivotable from a non-actuated position to an actuated position to cause a dose of fuel to be dispensed from the fuel cell, the dosing lever including a first contact surface engagable with the cylinder head when the dosing lever is in the non-actuated position and a second contact surface that is slidably engageable by a ring finger of the combustion chamber ring when the dosing lever is moved from the non-actuated position to the actuated position,
wherein the dosing lever includes a body including a leg connection section, a fuel cell door facing section, and a fuel block contact section,
wherein the dosing lever includes a dosing lever leg connected to the connection section at a first end of the dosing lever leg,
wherein the dosing lever leg includes a foot connected connected to a second end of the dosing lever leg, and
wherein the fuel cell door facing section of the body of the dosing lever includes a first beveled portion, a second beveled portion connected to a first end of the first beveled portion, and a third beveled portion connected to a second end of the first beveled portion opposite the first end.

2. The fastener driving tool of claim 1 , wherein the foot defines an angle of approximately 32 degrees between the first contact surface and the second contact surface.

3. The fastener driving tool of claim 1 , wherein the first beveled portion defines a downward sloping rectangular surface, the second beveled portion defines a downward sloping first trapezoidal surface, and the third beveled portion defines a downward sloping second trapezoidal surface.

4. The fastener driving tool of claim 3 , wherein the downward sloping rectangular surface, the downward sloping first trapezoidal surface, and downward sloping second trapezoidal surface have a reduced thickness of the fuel cell door facing section that the body of the dosing lever does not engage a fuel cell door of the fuel supply assembly during actuation of the dosing lever.

5. A fastener driving tool comprising:
a housing;
a fastener driving assembly at least partially positioned in the housing, the fastener driving assembly including:
a cylinder head connected to the housing,
a combustion chamber connected to the cylinder head,
a cylinder connected to the combustion chamber, and
a combustion chamber ring between the combustion chamber and the cylinder head, the combustion chamber ring movable from an actuated position to a non-actuated position;

a workpiece contact assembly connected to the housing; and
a fuel supply assembly at least partially in the housing, the fuel supply assembly including:
a fuel cell receiving assembly in the housing, the fuel cell receiving assembly configured to receive a fuel cell and a fuel cell adapter connectible to the fuel cell;
a fuel cell receiving block shaped and sized to receive the fuel cell adapter, and
a dosing lever pivotally supported by the housing and pivotable from a non-actuated position to an actuated position to cause a dose of fuel to be dispensed from the fuel cell, the dosing lever including a first contact surface engagable with the cylinder head when the dosing lever is in the non-actuated position and a second contact surface that is slidably engageable by a ring finger of the combustion chamber ring when the dosing lever is moved from the non-actuated position to the actuated position,
wherein the dosing lever includes a body including a leg connection section, a fuel cell door facing section, and a fuel block contact section, and
wherein the fuel cell door facing section of the body of the dosing lever includes a first beveled portion, a second beveled portion connected to a first end of the first beveled portion, and a third beveled portion connected to a second end of the first beveled portion opposite the first end.

6. The fastener driving tool of claim 5 , wherein the first contact surface extends at an angle of approximately 32 degrees relative to the second contact surface.

7. The fastener driving tool of claim 5 , wherein the first beveled portion defines a downward sloping rectangular surface, the second beveled portion defines a downward sloping first trapezoidal surface, and the third beveled portion defines a downward sloping second trapezoidal surface.

8. The fastener driving tool of claim 7 , wherein the downward sloping rectangular surface, the downward sloping first trapezoidal surface, and downward sloping second trapezoidal surface have a reduced thickness of the fuel cell door facing section that the body of the dosing lever does not engage a fuel cell door of the fuel supply assembly during actuation of the dosing lever.

Assignees

• Illinois Tool Works

Inventors

• Frank Adam J
• Maniar Ninad C

Classifications

• B25C1/08 Primary

  operated by combustion pressure · CPC title

• B25C5/10

  Driving means · CPC title

• B25C1/18 Primary

  Details and accessories, e.g. splinter guards, spall minimisers · CPC title