File adapter for power saw tool
AssigneeFilezall, Inc.
InventorRobert R. Fontaine
Life of this patent
Estimating the term…
Abstract
A file adapter for a motor driven workpiece cutting tool comprises a power head reciprocating an elongate file coupled to a ram-rod reciprocated thereby on a forwardly projecting axis. The adapter includes a forwardly extending member carried by the power head of the tool and positioning a resistance means for engaging and downwardly pressing the top face of the file forwardly of its coupled engagement to the ramrod. The file is a second class lever with its fulcrum coupled to the ram-rod and its resistance pressured at said resistance means when its cutting means forcibly engage a workpiece. The resistance means preferably comprises a roller on a transverse axis spaced above said forwardly projecting axis and with a periphery thereof engaging and downwardly pressuring the file.
Claims9
A file for coupled engagement to a ram-rod of a motor driven workpiece cutting tool with a power head reciprocating said ram-rod on a forwardly projecting axis, the file including:
- an elongate body with top and bottom faces with cutting means at least on said bottom face and having a vertically disposed mounting plate perpendicular to its top and bottom faces, the cutting means spaced from the mounting plate, the fastening means opening through the mounting plate for receiving a coupling fastener to the ram rod, and stops projecting from opposite sides of the file adjacent the mounting plate for use in retaining the file inside an adapter bracket coupled to the cutting tool for applying a resistance force to the file forward of its engagement to the ram-rod and behind the cutting means for converting the file into a second class lever.
A file adapter for a motor driven workpiece cutting tool with a power head reciprocating an elongate file coupled to a ram-rod reciprocated thereby on a forwardly projecting axis, the file having top and bottom faces with cutting means on said bottom face spaced from the ram-rod, the file adapter including:
- a forwardly extending member carried by the power head of the tool and positioning a resistance means for engaging and downwardly pressing on the top face of the file forwardly of its coupled engagement to the ram-rod and behind the cutting means, when the ram-rod causes the file to travel on a forward stroke along said axis,
- the file being a second class lever with its fulcrum coupled to the ram-rod and its resistance pressured at said resistance means when its cutting means forcibly engage a workpiece forward of the resistance means,
- the file adapter causing the resistance means to release downward pressure on the face of the file when the ram-rod causes the file to travel in a reverse direction, wherein the file adapter includes a shoe for fixed attachment to the cutting tool, a bracket pivotally secured to a remote end of the shoe spaced from its attachment to the cutting tool, a pivot between the bracket and shoe, the resistance means coupled to the bracket remote from the pivot, wherein the resistance means releases said contact with the file when the bracket pivots the resistance means away from the file on the reverse stroke of the ram-rod.
A motor driven workpiece cutting tool with a power head reciprocating a ram-rod on a forwardly projecting axis, and including:
- an elongate file coupled to the ram-rod to be reciprocated thereby, and having top and bottom faces with cutting means at least on said bottom face spaced from the ram-rod, and
- a file adapter extending forwardly from the power head of the tool and positioning a resistance means for engaging and downwardly pressing the top face of the file forwardly of its coupled engagement to the ram-rod and behind the cutting means, when the ram-rod causes the file to travel forward on said axis, the file adapter causing the resistance means to release downward pressure on the top face of the file when the ram-rod causes the file to travel in a reverse direction,
- the file being a second class lever with its fulcrum coupled to the ram-rod, its resistance pressing at said resistance means forwardly of the ram-rod and behind said cutting means, when its cutting means forcibly engage a workpiece,
- the file adapter having a narrowed region aligned generally on said axis and a widened region spaced from said axis, so that a stop device carried on the file can pass through the widened region but engage the narrowed region to retain the file inside the file adapter in the event the file becomes dislodged from the ram-rod during use.
A file for coupled engagement to a ram-rod of a motor-driven workpiece cutting tool with a power head reciprocating the ram-rod on a forwardly projecting axis, the file including an elongated body having top and bottom faces with a cutting surface on at least the bottom face, a vertically disposed mounting plate integral with the body and extending generally perpendicularly to the top and bottom faces, the cutting means spaced from the mounting plate, and a fastening adapter opening through the mounting plate for coupling a fastener to the ram-rod, including safety ears projecting outwardly from opposite sides of the file body immediately in front of the mounting plate.
Dependencies are inferred from the claim text.